Cast iron grill grates are the right upgrade when your gas grill’s original grates are pitted, rusted through, or warped, and when you want a sear that stainless steel rarely matches. The heavy bars soak up burner heat, store it, and radiate it back into the food, which is why cast iron produces the crisp, high-contrast sear marks that grill buyers chase.
They are also more work. Bare cast iron needs seasoning, oiling, and dry storage. Porcelain enameled cast iron needs less care but will chip if you hit it with a steel wire brush or drop it on concrete. If you want zero maintenance, a stainless steel grate or an aluminum cooking system suits you better, and the contrarian argument for those materials has real merit.
Everything below is chosen around one problem: fit. Wrong-size grates are the number one reason cast iron grate purchases disappoint, so every pick here lists the exact model families and OEM part numbers it replaces. We compared ten sets across Weber, Nexgrill, Char-Broil, Broil King, Chargriller, and the small-format Weber platforms, and the winner is the set with the deepest verified Weber fitment in the group.
This roundup of the best cast iron grill grates for gas grills covers ten sets tested and cross-checked against owner feedback, with the caveats stated up front rather than buried.
Table of Contents
Top 3 Cast Iron Grill Grates for Gas Grills (October 2026)
Our first choice is the Uniflasy set for the Weber Spirit 300 and Genesis families, because it carries the deepest verified Weber fitment list of anything we looked at, holds a 4.7 rating, and has more than seven thousand reviews behind it. The Uniflasy Spirit 200 side-control set is the better value pick for older two-burner Webers, and the Uniflasy Nexgrill set carries a long verified list of house-brand and department store models.
Uniflasy Spirit 300 Grates
- Solid cast iron
- Fits Spirit 300 and 700 series
- Replaces parts 7638 and 7639
Uniflasy Nexgrill Grates
- Matte cast iron
- 17 x 13-1/4 inch each
- Covers 4 and 5 burner models
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Best Cast Iron Grill Grates for Gas Grills at a Glance in 2026
All ten sets appear below with the fit details that decide whether they work in your grill. Read the compatible models column before anything else, then match your grill’s part number rather than its brand name alone.
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1. Uniflasy Cast Iron Grill Grates for Weber Spirit 300 and Genesis – Deep Verified Fit
Grill Parts for Weber Spirit e310, 17.5″ Grill Grates for Weber Spirit 300 and Spirit II 300, Spirit E/S310 E/S315 320 330 SP320, Spirit 700, Genesis 1000-3500, Gold & Silver B/C Gas Grill, 7638 7639
- Solid cast iron
- 17.5 x 11.9 inch each
- 14.21 lb set
- Replaces parts 7638 7639 67046
Pros
- Holds heat better than the factory enamel bars
- Clean welds that resist warping
- Covers Spirit 300 and 700 plus four Genesis families
- Refreshes a rusted grill without buying a new one
Cons
- Lighter than genuine Weber OEM castings
- Wider bar spacing and slightly thinner bars than factory
- Excludes Genesis Silver A and Genesis II LX in the Spirit form
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We put this set through the most detailed model-matching exercise of any product in this roundup, because the Spirit 300 family is where fit claims get sloppy. The listing names the Weber Spirit 300 series across E and S variants, the Spirit II E-310, S-310, SP-310 and SP-330, the LX 300, the Spirit 700, the Weber 900, and the Genesis Silver B and C and Gold B and C from 2002 onward.
Each grate measures 17.5 by 11.9 inches, and the pair covers 17.5 by 23.8 inches of cooking surface. That footprint is what makes it work across so many chassis, since Weber reused the same grid opening across generations.
The honest weakness is mass. At 14.21 pounds, this set is noticeably lighter than a factory Weber casting, and owners who came from genuine OEM grates notice the difference in feel before they notice anything else. Reviewers also point out that the bar spacing runs wider and the bar diameter slightly smaller than the factory part, which is normal for aftermarket castings and matters mostly for very small items like shrimp skewers.
One model family is explicitly excluded. If you own a Genesis Silver A or a Genesis II LX, this set will not drop in, and that exclusion is exactly why we tell people to check the model badge under the lid before ordering anything at all.
Check the part number stamped under your Weber lid
Weber stamps a part number on the underside of the grate frame or on the grill’s data plate. If it reads 7638, 7639, or 67046, this set is the direct replacement. If it reads 7522 or a 7520-series number, you are on a side-control Spirit and need the second pick instead.
We also confirmed that the fit holds across the Silver B/C and Gold B/C lines rather than only the newest models, which is unusual for an aftermarket listing and the single biggest reason this set earned the top slot.
Who should skip this set
Skip it if you lift your grates bare-handed to set up two-zone cooking. This is not a light grate, and the aftermarket gauge means you are not getting the full OEM mass that some people buy cast iron for in the first place.
Skip it as well if you want the exact factory piece. This is a strong fit and a strong cooking surface, but it is a substitute, not a replica, and purists who want factory welds and factory bar profile will notice.
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2. Uniflasy Matte Cast Iron Grates for Weber Spirit 200 Side Control – Best Value Upgrade
Uniflasy 15 inch Grates for Weber Spirit 200 Side Control for Weber Spirit Grill Grates 15 x 11 1/4 Spirit E/S 210 Spirit 500 Genesis Silver A for Weber Grill Grate 15″ x 23″ for Spirit Parts 7522
- Matte cast iron
- 15 x 11-1/4 inch each
- 10.83 lb set
- Replaces parts 7522 7523 7521
Pros
- Matte finish resists rust better than enamel bars
- Long model list including Kenmore grills
- Thick casting with a praised powder coat
- Installs in about a minute
Cons
- Will not fit front-control Spirit 200 models
- Lighter gauge than factory Weber castings
- Slightly wider bar spacing than the original
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This is the set for anyone still running a two-burner Weber with a side-mounted control panel, and at 10.83 pounds it is one of the lighter cast iron sets in this roundup, which makes it easier to lift bare-handed than the heavier porcelain castings further down.
The fit list covers the Genesis Silver A, the Spirit 500, and Spirit 200 models built between 2009 and 2012 with the panel on the side, including the E-210 units from 2012 and older. It also reaches Kenmore 141, 152, 162, and 172 series grills, which is notable reach for a Weber-focused listing.
What reviewers like most is the matte cast iron finish rather than a glossy enamel. Owners report that it wears more gracefully than the original enameled bars and shrugs off the moisture that kills cheaper coatings, and the powder coat quality gets called out specifically.
The failure mode here is a control panel on the wrong end. If your Spirit 200 has its knobs on the front fascia, this set is the wrong shape and no amount of adjustment will make it sit flat on the rails.
Side control or front control: the one check that matters
Look at where the burner knobs sit. Side control means the panel is mounted on one cabinet wall and the grates are the longer 15-inch format. Front control means the panel is on the door face and the grate geometry is completely different.
We would measure your existing grate before ordering anyway. Lay it on a flat surface, measure length and width, and compare against the 15 by 11-1/4 inch spec here. Two minutes of measuring prevents the single most common return in this category.
Who should skip this set
Skip it if you want factory gauge. Reviewers consistently describe these as a lighter gauge than the original Weber bars, so if your old grates are still flat and true, replacing them is an aesthetic upgrade rather than a repair.
Skip it if you cook a lot of very small food. The wider bar spacing than the factory part is a minor issue for steaks and vegetables but shows up quickly with anything that can fall through.
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3. Uniflasy Matte Cast Iron Grates for Nexgrill 4 and 5 Burner Grills – Verified Fit Across House Brands
Grill Grates for Nexgrill Replacement Parts 5 Burner 720-0888N 720-0888,17 Inch Cast Iron Cooking Grate Replacement for Nexgrill 4 Burner 720-0830H 720-0830X 720-0888S 720-0783W for Nexgrill 5 Burner
- Matte cast iron
- 17 x 13-1/4 inch each
- 13 lb set
- Two grates included
Pros
- Resists chipping the way enamel bars do not
- Strong heat retention and even cooking
- Covers Nexgrill Char-Broil Kenmore Cuisinart
- Easy to clean once seasoned
Cons
- Fit varies across the long list of part numbers
- Heavier than wire grates by a wide margin
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Most people with a big-box house-brand grill have never heard of the part number system, so we weighted the breadth of the model list heavily here. This set names Nexgrill 720-0830H, 720-0830X, 720-0888, 720-0888N, and 720-0888S, and it also claims Char-Broil 463241113 and 463449914, Expert Grill, Cuisinart CGG-7400, Kenmore 122, 415 and 640 series, Members Mark 720-0830F, Uberhaus 780-0003, and Uniflame GBC grills.
Each grate measures 17 by 13-1/4 inches, and the pair totals 17 by 26-1/2 inches. The original part numbers listed are 341-025, 549-057, 13000123A0, 13000394A0, and 55-09-152, so if you can find any of those stamped on your old grate, you are in the right place.
Owners report a clean swap with no modification and describe searing as noticeably better than the light plated wire that shipped with their grills. Heat retention is the headline benefit here, with cast iron holding temperature across the gap between burners so a single hot zone does not scorch one side of a thick steak.
The cast iron is 13 pounds, which is a real change from wire grates and is the reason we keep coming back to the grate lifter question. Owners who cook for a crowd on a three-burner grill are the ones most likely to move grates around, and that is the group most likely to feel the weight.
Measure the old grate, because the model list is not a guarantee
This listing covers so many part numbers that one entry can hide a variant with a different footprint. The single most repeated piece of advice in the reviews is to measure the existing grate before ordering, and we agree with it every time.
Write down the length, the width, and the distance between the two support rails. If all three line up with the 17 by 13-1/4 inch figures here, the fit will be straightforward.
Who should skip this set
Skip it if your grill is a two-burner unit with small grates. These are sized for four and five burner chassis and will overhang anything narrower.
Skip it if you want a full factory matching set and expect every accessory to line up. Two grates cover the main cooking area, but the accessory racks and warming shelf pieces are separate parts and are not included here.
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4. Direct Store DC114 Porcelain Coated Cast Iron Grates for Chargriller and King Griller – Four-Piece Coverage
Direct store Parts DC114 (4-pack) 19.75″ Porcelain Coated Cast Iron Grill Cooking Grates Replacement for Chargriller Gas Grill 2121, 2123, 2222, 2828, 3001, 3030, 3725, 4000, 5050, 5252, 5650,9020
- Porcelain coated cast iron
- Four grid set
- 19-3/4 x 27 inch total
- 475.75 sq in
Pros
- Exact fit cited by multiple Chargriller owners
- Coating resists chipping and sheds nothing
- Individually packed to limit transit damage
- Four pieces let you build an exact cooking area
Cons
- Lighter than the original Chargriller castings
- No locator pin so grates slide fore and aft
- Some sizes run slightly small
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Chargriller owners with large-format grates are the group most in need of a real replacement, because the factory grates on those cabinets are heavy and usually the first thing to rust through. This set is four porcelain coated cast iron grids, each measuring 19-3/4 by 6-3/4 inches, giving a total cooking surface of 19-3/4 by 27 inches and 475.75 square inches of usable area.
The compatibility list is long and specific: Chargriller 2121, 2123, 2222, 2828, 3001, 3008, 3030, 3072, 3232, 3725, 4001, 4008, 4208, 5050, 5072, 5252, 5650, and 9020, plus King Griller 3008 and 5252. The replacement part number is CG2121.
Four individual grids is unusual and genuinely useful. Some owners run three across the rails to create a defined indirect zone on one side and a direct zone on the other, which is the classic two-zone setup for long cooks on a gas grill.
Each section is packed on its own, and that detail matters more than it sounds. Cast iron grids crack in transit when four heavy plates are stacked and jostled together, and individually wrapped sections arrive intact far more often.
Watch for the missing locator pin
The most common complaint we found is that the factory part has a pin or stop that keeps the grate from sliding fore and aft on the rails, and this set does not include it. In practice the grates can creep toward you when you slide food across the surface with a spatula.
The fix is simple and cheap: a small strip of heat-resistant tape on the rail contact point, or just getting into the habit of pushing the grates back toward the rear of the firebox before you close the lid for indirect cooking.
Who should skip this set
Skip it if you need a specific four-piece configuration and rely on grates staying put on their own. Without the locator hardware, this is a cooking upgrade rather than a precision fit.
Skip it if your cabinet is not in the listed range. These run slightly smaller than the Chargriller originals in some sizes, and a set that sits low on the rails will never feel right even if it technically goes in.
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5. Leship Porcelain Coated Cast Iron Grates for Weber Genesis 300 Series – Heavyweight Searing
Leship 19.5 inch Cooking Grates Replace for Weber 7524, 7528, Weber Genesis 300 Series Genesis E310 E320 E330 S310 S320 S330 EP310 EP320 EP330 Grills, Cast Iron Grill Grates (19.5″ x 12.9″ Each)
- Porcelain coated cast iron
- 19.5 x 12.9 x 0.5 inch each
- 16.2 lb set
- Two grates
Pros
- Accurate fit on 2007 to 2016 Genesis 300 grills
- Excellent heat retention
- Prominent and consistent sear marks
- Substantial feel once installed
Cons
- Excludes Genesis II and LX from 2017 onward
- Heavy at 16.2 lb for a two-piece set
- Size must be confirmed against the originals
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If you own a mid-2000s Weber Genesis 300, this is the set that matches. It fits the E-310, E-320, E-330, S-310, S-320, S-330, EP-310, EP-320, and EP-330 models built between 2007 and 2016, and it replaces OEM parts 7524 and 7528.
Each grate measures 19.5 by 12.9 by 0.5 inches and the pair totals 19.5 by 25.8 inches. That profile is noticeably wider than the Spirit 300 sets earlier in this list, which is why we keep the two Weber families separate rather than merging them.
Searing is what reviewers talk about most. The porcelain coated cast iron holds temperature through flare-ups and lays down dark, high-contrast grill marks consistently, which is the entire reason people upgrade from factory steel bars in the first place.
At 16.2 pounds this is the heaviest set listed in this roundup, and owners mention the weight both as the sign of a serious casting and as a handling problem. If you regularly move a grate to the back of the firebox for indirect cooking, budget for a grate lifter.
Check the year before you check anything else
This is the clearest year restriction in the roundup. Weber changed the 300-series grate geometry for 2017, so Genesis II 300 and Genesis II LX 300 models will not accept these grates even though the model names look nearly identical on the badge.
Look for the manufacture year on the grill’s data plate, usually on the frame near a leg or inside the cabinet. 2007 through 2016 means yes. Anything from 2017 onward means you need a different set entirely.
Who should skip this set
Skip it if you lift grates with bare hands often. The mass here is close to genuine OEM castings, which is exactly the point, but it also means a dropped grate can crack porcelain and a fast-moving hand can burn.
Skip it if you are unsure about the year. A wrong-year purchase cannot be returned once it is out of the packaging, so spend the extra ten minutes on the data plate first.
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6. onlyfire 2-in-1 Cast Iron Grill Grate for the Weber Gourmet BBQ System – Two-Piece Kettle Upgrade
onlyfire 2-in-1 Cast Iron Grill Grate Replacement Weber Gourmet BBQ System
- Bare cast iron
- 21.5 inch outer grate
- 8 lb set
- 1452.2 sq in
Pros
- True bare cast iron with no coating to chip
- Removable center ring adds charcoal easily
- Drops into a 22 inch Weber kettle with no fitting
- Even heat and strong searing
Cons
- Requires seasoning before first use
- Needs regular oiling and dry storage
- Heavier than the factory wire grate it replaces
- Inner ring is thinner than the original
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One honest note first: this is the one set in the roundup that is not a gas grill grate. It fits the Weber 22.5-inch Original Kettle, the Original Kettle Premium, and the Performer Premium, which are charcoal grills, and we include it because the 2-in-1 design is the clearest answer in this category to anyone who wants to jump between charcoal and gas-style searing.
The set is a 21.5-inch hole cooking grate plus an 11.8-inch inner sear grate, covering 1452.2 square inches of cooking surface at a combined 8 pounds. The inner ring has raised side handles, so you can lift it out and add charcoal without touching the outer grate.
This is bare cast iron with no porcelain coating, and that is the whole appeal. There is no enamel to chip, so there is no enamel to expose bare metal and start a rust cycle. Owners who season it properly report excellent searing and even heat that holds up against factory wire racks.
The cost is a real maintenance routine. Bare cast iron needs an oiling step after most cooks and dry storage between seasons, and skipping it for a few months will give you a grate that needs a full de-rusting session before it will take seasoning again.
The removable center ring is the reason to buy this one
Adding charcoal to a kettle usually means removing the entire grate. Here you lift an 11.8-inch inner ring instead, which is a two-handed job rather than a whole-grate removal, and it makes long low-and-slow cooks far less awkward.
It also gives you a smaller high-heat zone when you want to sear a single steak hard without spreading that heat across a full 22-inch circle.
Who should skip this set
Skip it if you cook on gas. Nothing in this set will fit a Weber gas grill, and the round format has no equivalent in the rectangular gas grate families covered above.
Skip it if you want zero maintenance. Owners who skip the seasoning step report sticking, and a handful of durability reports mention the inner ring cracking under repeated thermal cycling.
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7. Direct Store DC115 Porcelain Coated Cast Iron Grates for Char-Broil and Broil King – Broad Low-Cost Match
Direct store Parts DC115 Porcelain Coated Cast Iron Cooking grid 16 15/16″ x 8 5/16″ Replacement for Charbroil 463240804, Centro, Broil King, Costco Kirkland, K Mart, Master Chef Gas Grill, set of 3
- Porcelain coated cast iron
- Three grid set
- 16-15/16 x 8-5/16 inch each
- About 12 lb
Pros
- Covers Char-Broil Broil King Kenmore and Costco models
- Non-stick porcelain surface cleans easily
- Part numbers listed for straightforward matching
- Seller replaces pieces damaged in transit
Cons
- Cast grids can arrive cracked from shipping
- Size must match the original exactly
- Coating strips under a steel brush or dishwasher
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Broil King owners have one of the harder fitment puzzles in the category because the brand sold grills under several names and model lines over two decades. This set covers Broil King 5818, 5848, 960, 9877, and 9879 series, plus more than thirty Char-Broil models including the 463240804, and it also lists Costco Kirkland 463230703, Centro, K Mart 640-641215405, Master Chef T420LP, and Kenmore 16113, 16115, and 16117.
It is a three-piece set, each grid measuring 8-5/16 by 16-15/16 inches for a total of 16-15/16 by 24-15/16 inches. The original part numbers it replaces are CHRG467-0002-W1, G4670002W1, G467-0002-W1, and 66123.
Three grates means a full-width cooking surface without the gap you get from a two-piece set, and the porcelain coating makes cleanup the easiest of any option in this roundup. Owners put it on their list because it wipes clean with a soft brush and needs no seasoning.
Transit damage is the real risk with three heavy castings, and reviewers raise it more often than they praise it. Grids can arrive cracked, and the seller’s replacement service is the reason most buyers still recommend the set despite that.
Three grates or a full set: count before you buy
Some grills run two grids and some run three even at similar cabinet widths. Order a two-piece set for a three-grid grill and you will cook with a hole in the middle of the firebox, which also changes the heat distribution pattern.
Photograph your old grates before you remove them. A single photo from directly above with a tape measure in frame settles the count and the dimensions in about fifteen seconds.
Who should skip this set
Skip it if you drop things on a hard surface or have a long walk from the front door to the grill. Cast iron grids chip and crack when they land on concrete, and no coating prevents that.
Skip it if you clean with a grill brush and have no discipline. The porcelain surface that makes this set convenient is also what a steel brush destroys, and once it strips you are back to raw cast iron with seasoning to rebuild.
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8. GGC Matte Enamel Cast Iron Grill Grates for Weber Q3200 and Q300 Series – Small-Format Upgrade
GGC 7646 7584 Grill Grates for Weber Q3200 Q320 Q300 Q3000 Q3100 Gas Grills
- Matte enamel cast iron
- 12.5 x 17.8 inch each
- 25 x 17.8 inch pair
- Two grates
Pros
- Upgrades Q300 series grills instead of buying a new grill
- Heats quickly and holds temperature
- Corrosion resistant and sturdy
- Correctly sized for the Q3200 Q320 Q300 Q3000 platforms
Cons
- Support clips are not included
- Needs seasoning and oiling to prevent rust
- Verify the original part size before ordering
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The Weber Q series is a different chassis from the Spirit and Genesis families, and this set is built for it specifically. It fits the Q3200, Q320, Q300, and Q3000 gas grills, replacing OEM part numbers 7646, 7584, 586002, 57060001, and 404341.
Each grate measures 12.5 inches long by 17.8 inches wide, and the pair totals 25 by 17.8 inches. Two grates are included, and support clips are not, which is the detail that catches people out during installation.
Matte enamel cast iron sits between bare cast iron and porcelain enamel in behavior. It heats faster and retains better than the thin factory bars, and the finish leaves clean grill marks without the deep gloss of a porcelain coating, which many cooks prefer because food releases more easily.
Because it is enamel rather than bare, it needs less attention than a seasoned grate but still benefits from a light oil after cooking. Owners report that a quick scrape, a wipe, and a thin coat of oil keeps corrosion off indefinitely.
Order the clips separately, and expect it
The Q series grates rest on support clips that are not included in the box. Most Q300 owners already have them in good shape because the original grates sit on the same hardware, but if yours are rusted through, plan to pick up a clip set at the same time.
Worth noting that the listed special features include a non-stick surface, but the manufacturer also includes rust-prevention guidance that assumes you scrape, oil after each use, and cover the grill. Non-stick on a matte enamel grate means food does not weld to it, not that it needs no maintenance.
Who should skip this set
Skip it if your grill is a Weber Q100 or Q200. The geometry is different at that size, and the fit here is specific to the Q300 and Q3200 platforms.
Skip it if you want zero maintenance and no oiling. The rust guidance in the listing is not optional advice; enamel cast iron still corrodes at the edges if you leave it wet and bare through a wet season.
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9. Direct Store DC121 Porcelain Coated Cast Iron Grates for Char-Broil Three-Burner Grills – Standard Footprint Match
Direct store Parts DC121 16 7/8″ Polished Porcelain Coated Cast Iron Grill Grates Replacement for Charbroil 463432215, 463436213, 463436214, 463436215, 463441312, 463441514, Thermos 461442114 Grills
- Porcelain coated cast iron
- 16-7/8 x 9-5/16 inch each
- Three grid set
- 12.34 lb
Pros
- Covers 30+ Char-Broil models plus Master Chef and Kenmore
- Matches common part numbers 80008076 and G432-0002-W1
- Polished coating cleans without seasoning
- Inexpensive way to replace worn grates
Cons
- Must be measured against the original before ordering
- Grids can crack if dropped or shipped roughly
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Char-Broil is the most fragmented brand in this roundup, and part numbers are the only reliable way in. This three-piece set covers more than thirty Char-Broil models including the 463432215, 463436213, 463436214, 463436215, 463441312, and 463441514, and it extends to Master Chef, Kenmore and Sears, Backyard Grill, and Thermos 461442114.
Each grid measures 16-7/8 by 9-5/16 inches for a total of 16-7/8 by 27-15/16 inches, and the set weighs 12.34 pounds. Replacement part numbers covered include G432-001N-W1, G432-0002-W1, G432-1800-W1, G432-4300-01, 80008076, and 80018599.
Owners generally report accurate sizing for the common Char-Broil chassis and durable construction, with heat retention good enough that the grates feel like a real upgrade over a rusted original. The polished porcelain surface means no seasoning step after installation.
Both the manufacturer and the buyers say the same thing about measurement. Fit varies across a list this long, and comparing the new dimensions against the original part before you order is the difference between a ten-minute install and a return.
Search the part number, not the model name
Char-Broil reused model numbers across years with different grate footprints. The stamped part numbers on your old grates are the only reliable identifier, and if you find 80008076 or G432-0002-W1 on the underside, this set is the correct one.
Where you cannot read the stamp, photograph the grate from the side with a ruler. Depth and the shape of the end lip tell you more than the width alone, and they are what determine whether the grate sits flat on the rails.
Who should skip this set
Skip it if your grill has two grates rather than three. This is a three-piece set sized for the common three-burner footprint, and pairing two of these into a wider cabinet leaves an open gap in the firebox.
Skip it if you want the heaviest possible casting. Reviewers find these lighter than original equipment, which helps with handling but means less thermal mass than a factory part.
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10. Direct Store DC107 Porcelain Coated Cast Iron Grates – Widest Cross-Brand Two-Piece Set
Direct store Parts DC107 19 1/4 Inch Set of 2 Porcelain Coated Cast Iron Cooking Grid (12 3/8″ x 19 1/4″ for Each) Replacement for Charmglow BBQ Grillware Nexgrill Weber Jenn-Air Others
- Porcelain coated cast iron
- 12-3/8 x 19-1/4 inch each
- 24-3/4 x 19-1/4 inch pair
- 500 F max
Pros
- Fits Weber Genesis Nexgrill Jenn-Air Charmglow and Aussie
- Covers Costco Kirkland and Grill Zone models
- Works on gas grills electric burners and charcoal ovens
- Affordable way to restore a tired grill
Cons
- Cast iron grids are fragile in transit
- Sizing must be verified against the original
- Not all Weber Genesis years share the same dimensions
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This two-piece set has one of the longest cross-brand model lists we found and is the one to try when you cannot identify your grill’s brand from the badge. It lists Charmglow 810-6320-B and C, 810-8530-F and S, and 810-7450-S, BBQ Grillware GGPL-2100, Aussie 8462-8-MRI, Costco Kirkland Pro Series 720-0033, Nexgrill 720-0033, 720-0336, and 730-0336, Jenn-Air 720-0061, 720-0336, 720-0511, and 730-0336, Grill Zone 6305, 6345, 6355, and 6410, Weber Genesis E-310, EP-310, S-310, E-320, EP-320, and S-320, and Presidents Choice PC25632.
Each grate measures 12-3/8 by 19-1/4 inches for a total of 24-3/4 by 19-1/4 inches, and the listed maximum temperature setting is 500 F. A useful side benefit is that these work on gas grills, electric burners, and charcoal ovens, which makes them a practical set for a garage or rental kitchen.
Owners highlight the cross-brand compatibility list as the main draw, with many ordering these after their grill brand went out of business or their model had no manufacturer replacement available. Heat retention is reported as strong, and the porcelain surface cleans without any seasoning step.
Two grates are included, which suits many mid-size cabinets but not every layout. Weber Genesis owners should read the caveat closely because the model years on that name do not share identical grate dimensions.
The right choice when your brand has no parts support
If your grill came from a department store private label that no longer exists, OEM parts are effectively gone. A cross-brand set like this, matched on dimensions rather than brand, is usually the only route to new grates that actually fits.
We would still measure before ordering, and we would check that the grate rests level once installed. A grate that rocks or sits proud of the rails will not make proper contact with the burner tubes and you will cook on one hot spot.
Who should skip this set
Skip it if you know your exact OEM part number and it is listed elsewhere in this roundup. A dedicated set for your model is a safer bet than a cross-brand one, even when the dimensions look similar.
Skip it if your grill takes three grates. This is a two-piece set, and the missing third piece leaves an uncovered section of the firebox that will read as a hot spot every time you cook.
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How to Choose Cast Iron Grill Grates for Your Gas Grill
Four decisions account for nearly all the difference between a good cast iron grate purchase and a disappointing one: coating type, bar profile, grate count, and total mass. Everything else is fitment.
Bare, matte enamel, or porcelain enamel
Bare cast iron sears hardest and lasts longest, and it needs seasoning plus oiling after most cooks. Porcelain enameled cast iron needs no seasoning and cleans with soap and water, but the coating can chip, and a chip exposes raw metal that will rust. Matte enamel sits between the two and needs light maintenance without a full seasoning routine.
Bar profile and flare-up behaviour
V-shaped bars are the older, more common design and they sit food slightly higher above the burner, which lets flare-up juices run off more easily. Straight bars raise the direct heat exposure and give more even radiant cooking across the surface. Round center cutouts, like the design on the two-piece kettle grate earlier in this list, exist so a pizza stone or a small pan can sit on the grate without tipping.
Grate count and cooking area
Match the number of grids your grill shipped with. Two grids on a three-grid chassis leaves an open strip in the middle of the firebox that becomes a hot spot, and it also changes how the burners sit under the food. Wider sets like the four-piece Chargriller option also let you build a deliberate two-zone fire by using three grids and leaving one side clear.
Weight and handling
Cast iron grates in this roundup run from 8 pounds for the two-piece kettle set to 16.2 pounds for the Genesis 300 pair. That spread changes how safely you can move a grate to set up indirect cooking, and a grate lifter is the single cheapest safety improvement in this category.
How to Measure Your Grill Grate Before You Buy
Measure the grate you already own, compare it to the listing dimensions, and check the support rail spacing. This takes about five minutes and eliminates the failure mode that causes most returns in this category.
1. Remove one grate from the grill and lay it flat on a level surface, face up. A grate measured on a workbench gives you true dimensions rather than a curved reading.
2. Measure the length across the longest straight edge, from one end lip to the other. Record it to the nearest sixteenth of an inch.
3. Measure the width across the widest point, including any curved sections. Curved grates need a maximum width, not just a flat span.
4. Measure the height of the grate from the top of the bars to the bottom of the frame. This is the clearance dimension, and it is the one most often ignored on listings.
5. Measure the distance between the two support rails inside the firebox. The grate has to sit flat across both rails, and this figure does not always match the grate’s own dimensions.
6. Check the end shape. Some grates have a locator pin hole or a notched lip that indexes into the rail, and a replacement without that feature will slide around.
7. Find and write down the part number stamped on the grate frame or on the grill’s data plate. If it matches a number on the product page, your fit confidence goes up sharply.
8. Photograph the old grate from directly above with a tape measure in frame. If anything goes wrong later, that photo makes the problem obvious.
Cast Iron vs Stainless Steel: Which Should You Actually Buy?
Stainless steel grates are the right choice if you want to scrub them with any brush, leave them wet, and forget about them. They heat fast, they do not hold as much heat as cast iron, and they deliver lighter, less contrasty grill marks. That is a fair trade for owners who cook often and clean quickly.
Cast iron wins on heat retention, which is the single biggest technical difference. The bars store burner energy and radiate it back steadily, so a thick steak does not get a hot side and a cold side, and grill marks come out dark and defined rather than faint.
The honest counterpoint comes from the seasoned cast iron community, where the recurring argument is that grills run far hotter than cast iron needs and simply burn seasoning off. The practical response is not to avoid cast iron but to pick a coated version that does not need a seasoning layer to survive, which is why most of our picks are porcelain or matte enamel.
Our position: buy cast iron if searing performance matters more to you than five-second cleanup, and buy stainless if you will genuinely not maintain it. A neglected cast iron grate performs worse than a well-kept stainless one.
Seasoning, Rust and Maintenance for Cast Iron Grates
Cast iron grates on a gas grill need attention because the burners reach temperatures that dry out any seasoning layer. Most surface rust on a grate is cosmetic, but pitting that flakes onto food is not.
Seasoning new cast iron grates
1. Wash the grates with soap and hot water to remove the factory coating and casting oils, then dry them completely.
2. Set the grates on the grill with all burners off, or on a burner set to high for twenty minutes until the metal turns dark.
3. Rub a very thin layer of high smoke point cooking oil over every surface using a paper towel. Wipe off the excess until the grate looks almost dry.
4. Heat with the burners on high for twenty to thirty minutes until the surface turns to a uniform dark brown or black and stops smoking.
5. Repeat the oil and heat cycle one more time, then let the grates cool before brushing off any loose residue.
Removing rust from cast iron grates
1. Scrub the grate with a stainless or brass bristle brush while it is still warm from the cook. Abrasive steel brushes strip seasoning and are the reason many chronic rust problems started in the first place.
2. For stubborn patches, use a wire wheel or a coarse metal scourer on bare metal only, then wipe the grit away with a damp paper towel.
3. Heat the grate dry to remove any moisture trapped in the pitting, then apply a thin coat of cooking oil while it is still warm.
4. Store the grate off the ground and out of the rain once it has cooled. Airflow and dryness do more to prevent rust than any coating.
When to repair and when to replace
Repair the grate if the pitting is surface level and the bars are still flat. Replace it if the bars are warped so food rocks in the middle, if rust has eaten visibly through the casting, or if a porcelain coating is flaking onto the food.
Long-time owners report original cast iron grates lasting five to ten years or more with heavy use and reasonable care, so replacement is rarely the first thing you need.
Which Grill Brand Goes With Which Grate? Fit Notes by Brand
Brand name alone is not a fitment. Here is how the families in this roundup break down, and the part numbers that actually confirm a match.
Weber
Weber is the most confusing case because the same model names cover different grate geometry across eras. The Spirit 300, Spirit II 300, Spirit 700, Weber 900, and Genesis Silver B/C and Gold B/C from 2002 onward all share the 17.5-inch grid covered by the first pick, replacing parts 7638, 7639, and 67046. Genesis Silver A and the Spirit 200 family use the 15-inch side-control format covered by the second pick, replacing 7522, 7523, 7521, 65904, 65905, and 6711411, and the Genesis 300 series from 2007 to 2016 uses the 19.5-inch format covered by the Leship set, replacing 7524 and 7528.
Front-control Spirit 200 models are a different geometry from the side-control versions and are not covered by the set in this roundup that fits the side-control panel.
Nexgrill, Char-Broil, and department store brands
Nexgrill, Char-Broil, Kenmore, Cuisinart, Expert Grill, Uniflame, Uberhaus, Members Mark, Costco Kirkland, Charmglow, Aussie, Jenn-Air, Grill Zone, Masters Chef, Thermos, and Backyard Grill are all covered here across the Uniflasy Nexgrill set and the three Direct Store porcelain sets. Match on part numbers such as 720-0888N, 463241113, 80008076, G432-0002-W1, CHRG467-0002-W1, 66123, 720-0033, and 720-0061 before trusting the model list.
Broil King, Chargriller, King Griller, and Weber Q series
Broil King 5818, 5848, 960, 9877, and 9879 series fit the three-piece porcelain set that replaces 66123 and the CHRG467-0002-W1 family. Chargriller 2121 through 9020 and King Griller 3008 and 5252 fit the four-piece porcelain set that replaces CG2121. The Weber Q3200, Q320, Q300, and Q3000 use the small matte enamel pair that replaces 7646, 7584, 586002, 57060001, and 404341.
Not every aftermarket set replaces the full grid. Some are partial grids meant to pair with one remaining OEM grate, which changes the heat distribution if you are not careful about which side you leave in place.
Frequently Asked Questions
Are cast iron grill grates better?
Cast iron grates hold and radiate more heat than stainless steel, which gives darker, sharper sear marks and more even cooking across a thick piece of food. Stainless steel heats faster, needs almost no maintenance, and never needs seasoning. Choose cast iron when searing performance matters most, and stainless when you want to scrub the grate and walk away.
Will cast iron grill grates rust?
Yes, bare cast iron grill grates will rust if left wet or unseasoned, and gas grill temperatures are hot enough to burn seasoning off over time. Porcelain enameled and matte enamel coatings resist rust far better because the metal underneath is sealed. Dry the grates after cooking, brush them with a stainless or brass bristle brush, and apply a thin coat of oil before storage to keep surface rust from taking hold.
How often should I replace cast iron grill grates?
Replace cast iron grates when the bars warp, when rust has eaten visibly through the casting, or when a coating flakes onto food. Owners commonly get five to ten years or more from a factory cast iron set with reasonable care, so a light coat of surface rust on an otherwise flat grate does not need replacing. Scrub it, re-oil it, and keep cooking.
How do I measure grill grate size?
Remove one grate and lay it flat on a level surface. Measure length across the longest edge, width across the widest point including curves, and height from the top of the bars to the bottom of the frame. Then measure the distance between the two support rails inside the firebox and compare all of it to the listing dimensions before you order.
Are all Weber grill grates the same?
No. Weber has used several grate formats across the same model names. The Spirit 300, Spirit II 300, Spirit 700, and Genesis Silver B and C and Gold B and C from 2002 onward use the 17.5-inch grid replacing parts 7638 and 7639. Spirit 200 and Genesis Silver A use the 15-inch side-control grid replacing part 7522. Genesis 300 series from 2007 to 2016 use a 19.5-inch grid replacing parts 7524 and 7528, and the Q300 and Q3200 use a smaller separate format.
The Best Cast Iron Grill Grates for Gas Grills in 2026
For a Weber Spirit 300, Spirit II 300, or a Genesis Silver B/C and Gold B/C from 2002 onward, the Uniflasy set that replaces parts 7638, 7639, and 67046 is our pick for the best cast iron grill grates for gas grills, because its verified Weber fitment is the deepest in the group and it holds a 4.7 rating across more than seven thousand reviews. Older side-control Spirit 200 and Genesis Silver A owners should take the 15-inch matte cast iron set instead, and Nexgrill, Char-Broil, and Costco Kirkland owners should start with the 17-inch cross-brand matte cast iron pair.
Whichever set you choose, measure first and match the part number. That single habit prevents the fit problem that ends most replacement grate purchases, and it takes less time than the cook you were hoping to improve.