Your gas grill deserves grates that hold heat, resist corrosion, and deliver clean sear marks every time, yet finding a set that fits your exact burner layout without rusting after one season remains the biggest frustration in outdoor cooking.
I’m Mohammad Maruf — the founder and writer behind Drink4Good. I’ve spent years analyzing grill replacement parts, comparing cast iron vs. stainless steel construction, and decoding the spec sheets that determine whether a set of grates extends your grill’s life or ends up in recycling.
Whether you’re restoring a worn-out Nexgrill, upgrading a Weber Spirit, or refreshing a Charbroil Tru-Infrared, this guide focuses on the compatibility, material quality, and heat retention that define the best grates for gas grill replacements available right now.
How To Choose The Best Grates For Gas Grill
Selecting the right replacement grates comes down to three factors: material type, exact dimensions of your original part, and the number of individual grid pieces that fit your burner configuration. Many buyers assume any rectangular grate fits any 4-burner grill, but a 16.5-inch width will not seat properly in a 17-inch frame, leaving gaps that cause flame flare-ups and uneven cooking.
Cast Iron vs. Stainless Steel
Cast iron grates excel at heat retention and searing, but they require routine seasoning to resist moisture-driven rust. Stainless steel alternatives — especially the 201 grade — resist corrosion without coating maintenance and are dishwasher-safe, but they do not hold temperature as long once the lid opens. For grills in humid or coastal environments, stainless steel often outlasts cast iron by multiple seasons.
Matte vs. Porcelain Coating
Matte cast iron relies entirely on your seasoning routine for nonstick performance. Porcelain-coated cast iron starts nonstick out of the box, but the coating can chip if a metal spatula or scraper hits it hard, exposing raw iron that rusts immediately. Matte grates are more forgiving during aggressive cleaning with brass brushes, while porcelain grates demand softer tools.
Matching Your Grill Brand and Model
Replacement parts labeled for Nexgrill, Charbroil, Dyna-Glo, Weber, and Char-Griller usually include cross-reference part numbers. Verify your original part number — found stamped on the underside of the grate or listed in the grill manual — before purchasing. A ¼-inch mismatch in width or length may prevent the grate from sitting flat on the burner tabs, causing wobble and uneven flame distribution.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Hongso for Weber Spirit | Cast Iron | Weber 300-series restoration | Matte cast iron, 17.5 x 11.9-inch each | Amazon |
| GasSaf for Chargriller | Cast Iron | Char-Griller 5050 / 2121 | 3-piece set, 19.75 x 6.75-inch each | Amazon |
| Hisencn 201 Stainless | Stainless | Nexgrill 4/5 burner rust resistance | 7mm thick 201 stainless, 17 x 13.2-inch | Amazon |
| BBQration for Charbroil | Cast Iron | Tru-Infrared 4-burner exact fit | 3-piece set, 17 x 9.5-inch each | Amazon |
| Uniflasy for Dyna-Glo | Cast Iron | Dyna-Glo 4/5 burner | Diamond + 2 flat cast iron grates | Amazon |
| Parts DC104 for Nexgrill | Cast Iron | Nexgrill 720-0830H price-conscious | Porcelain-coated cast iron, 17 x 13.25-inch | Amazon |
| Uniflasy for Nexgrill/Charbroil | Cast Iron | Nexgrill 720-0888N / Charbroil 4-burner | Matte cast iron, 17 x 13.25-inch | Amazon |
In‑Depth Reviews
1. Hongso 17.5″ Grill Grates for Weber Spirit
These matte cast iron grates measure 17.5 by 11.9 inches each, covering a total cooking area of 416.5 square inches, and they are direct replacements for Weber part numbers 7638 and 7639. The cast iron construction delivers exceptional heat retention — the bars hold temperature long enough to produce deep, restaurant-style sear marks on steaks and burgers without the temp drop you get from thinner stamped grates.
Hongso submitted these grates for SGS safety testing, confirming they meet food-contact standards with no harmful coatings leaching at high heat. The matte finish accepts oil seasoning readily, and the bars use a slightly thicker cross-section than Weber’s OEM grates, which buyers report as more resistant to warping under high-BTU burners. They fit Spirit 300 series units from 2007 through 2017 as well as Spirit II 300 models with the GS4 cooking system.
One detail worth noting: these grates do not include a porcelain coating, so you need to oil them after each cook to prevent surface rust. The trade-off is a nonstick surface that improves over time as the seasoning layer builds, rather than chipping off like enameled alternatives.
Why it’s great
- Thicker than OEM Weber grates for better durability
- Passes SGS food-safety testing
- Retains heat evenly across the full 17.5-inch span
Good to know
- Requires regular seasoning to avoid rust
- Does not fit Genesis 1000-series grills without confirming dimensions
2. GasSaf 19 3/4 inch Grill Grates for Chargriller
GasSaf delivers a three-piece set of cast iron grates measuring 19.75 by 6.75 inches each, fitting Char-Griller models 5050, 3001, 3008, 3030, 2121, and several King Griller units. The narrow individual sections make placement easier on grills with wide burner chambers, and the total combined surface spans roughly 27 inches front-to-back, matching the original CG2121 footprint.
The cast iron feels noticeably heavier than the stamped steel that ships with many Char-Griller models — buyers report the bars heat up faster and hold temperature longer during cold-weather cooks. The nonstick coating helps release burgers and chicken thighs without tearing, and the smooth surface cleans up with a brass brush and a light re-oiling after each session.
Because these grates are sold as individual sections rather than a single large grid, you can replace just one if it gets damaged, rather than buying a full set. The weight is substantial — expect around four pounds per section — so the grates stay seated firmly on the burner tabs without shifting when you slide a spatula across them.
Why it’s great
- Three-piece design allows partial replacement
- Heavier than OEM stamped grates for better heat retention
- Nonstick coating reduces food sticking immediately
Good to know
- Coating may wear over time; seasoning afterward is recommended
- Each section weighs about 4 pounds, adding to grill load
3. Hisencn 201 Stainless Steel Grates for Nexgrill
These stainless steel grates measure 17 by 13.2 inches each, using 201-grade bars that are 7 millimeters thick, making them the rust-resistant alternative for Home Depot Nexgrill models 720-0830H, 720-0888N, and 720-0830X. The smooth stainless surface eliminates the need for seasoning — just scrub with warm water and a soft brush, and the grates look new again without worrying about water exposure causing corrosion.
The 201 stainless composition includes a higher nickel content than basic 430 steel, which improves the material’s resistance to outdoor humidity and acidic marinades that can pit uncoated cast iron. Buyers note the 7mm bar thickness provides enough thermal mass to sear well, though stainless steel does not hold heat as long as cast iron once the lid is opened repeatedly. The dishwasher-safe construction is a convenience many cast iron users wish they had.
The grates are non-magnetic, confirming the 201 grade, and the bars are welded into a grid pattern that matches the original Nexgrill layout precisely. Some buyers report needing to narrow the grates slightly with a file for a perfect drop-in fit, but the adjustment takes about two minutes with a metal file and does not affect structural integrity.
Why it’s great
- No seasoning required — dishwasher-safe for easy cleaning
- 201 stainless resists rust and pitting in humid climates
- 7mm bar thickness retains enough heat for good sear marks
Good to know
- May need minor filing to fit some Nexgrill frames
- Does not retain heat as long as cast iron during lid-off cooking
4. BBQration 17 x 9 1/2 inch Grates for Charbroil Tru-Infrared
BBQration supplies a three-piece set of matte cast iron grates each measuring 17 by 9.5 inches, designed specifically for Charbroil Tru-Infrared 4-burner models including the Commercial, Signature, and Performance series. The original part number G541-0016-W2 cross-references directly, and the grates are machined to sit flush against the infrared emitter plates without rocking.
The matte finish allows buyers to season the grates to their preferred nonstick level, and the bare iron absorbs and redistributes heat from the infrared system more efficiently than porcelain-coated alternatives. At nearly 18 pounds for the set, these grates feel substantial and sit heavily on the burner rails, reducing movement when scraping. Buyers with the Lowe’s 606682 and Walmart 555179228 models confirm a drop-in fit with zero modification.
These grates include a thoughtful design detail: the outer edges are slightly beveled, which helps food slide off toward the warm side of the grill rather than catching on a sharp lip. The only trade-off is the weight — moving the grates for deep cleaning requires lifting nearly six pounds per section, which may be a consideration for users with limited grip strength.
Why it’s great
- Exact match for Charbroil Tru-Infrared G541-0016-W2
- Beveled edges prevent food from catching on the frame
- Heavy 18-pound set stays stable during scraping
Good to know
- Each section is heavy at nearly 6 pounds
- Requires seasoning before first use to prevent rust
5. Uniflasy Grill Grates for Dyna-Glo 4 Burner
Uniflasy packages one diamond-pattern center grate alongside two flat cast iron cooking grids, covering Dyna-Glo models DGH450CRP, DGH485CRP, DGH474CRP, and DGH483CRP as well as compatible Kenmore and Uniflame units. The diamond grate runs down the middle of the cooking surface, providing a raised grill-mark pattern for steaks while the flat grates on either side offer a smooth surface for delicate items like fish fillets or vegetables that might fall through wide slots.
The cast iron construction heats evenly across all three sections, and the combination of textures gives you more cooking versatility from a single set of grates. Buyers with the Dyna-Glo DGH474CRP confirm the dimensions match exactly at 16.5 by 27.72 inches total, and the grates sit flush against the burner housing without needing to trim or bend any bars.
The listing includes six detailed steps for avoiding rust — scrape after each use, oil the surface, leave dampers open, and cover the grill when not in use. Following this routine is essential since the grates come uncoated and rely entirely on the buyer’s seasoning effort to prevent corrosion through the season.
Why it’s great
- Diamond center grate + flat side grates for diverse cooking
- Exact fit for Dyna-Glo DGH450CRP and similar models
- Solid cast iron with no thin spots in the bars
Good to know
- No coating — requires diligent seasoning post-cook
- Diamond pattern may be harder to clean than flat grates
6. Parts DC104 Porcelain-Coated Grates for Nexgrill
The Parts DC104 set includes two porcelain-coated cast iron grates measuring 17 by 13.25 inches each, covering a total cooking surface of 17 by 26.5 inches. The porcelain layer provides a smooth nonstick surface right from the first cook, and the white gloss finish makes it easy to see where food residue has built up during cleaning. This set cross-references Nexgrill models like the 720-0830H and 720-0783E as well as Charbroil, Kenmore, and Uniflame units with the same footprint.
Porcelain coating protects the cast iron core from moisture better than matte iron, so these grates are less likely to develop rust spots if you skip a cleaning session. The coating does, however, require careful handling — dropping a grate or scraping aggressively with a metal tool can chip the surface, exposing the iron beneath to corrosion. Buyers report the width is off by about a quarter-inch on some Kenmore grills, though the grates still sit flat enough for even cooking.
At roughly 12 pounds total for the pair, these grates are easier to lift and maneuver than heavier matte cast iron sets. The porcelain finish also reflects heat slightly more than matte black iron, which can reduce flare-ups from grease drips by keeping the surface temperature more consistent across the cooking grid.
Why it’s great
- Porcelain coating resists rust better than bare cast iron
- Nonstick surface works immediately without seasoning
- Lightweight at roughly 12 pounds total
Good to know
- Coating can chip if scraped with metal tools
- May be 1/4-inch narrower on some Kenmore models
7. Uniflasy Matte Cast Iron Grates for Nexgrill 5 Burner
Uniflasy offers a two-pack of matte cast iron grates sized at 17 by 13.25 inches each, serving both Nexgrill 4-burner (720-0830H) and 5-burner (720-0888N) models alongside Charbroil 4-burner and Cuisinart CGG-7400 grills. The matte finish provides an aggressive cooking surface that grips food well for char marks, and the bare iron builds a natural seasoning layer over multiple cooks that eventually rivals any nonstick coating.
The grates are heavy at nearly 13 pounds for the pair, and the thickness of the bars prevents warping even after repeated high-heat searing sessions at 500 degrees Fahrenheit. Buyers report the grates fit perfectly into the Nexgrill frame with no gaps, though one verified review notes that rust appeared during the second season — a reminder that matte cast iron demands regular oiling and storage under a grill cover in humid regions.
These grates do not include any porcelain or ceramic coating, so the entire rust-prevention burden falls on the buyer’s post-cook routine. The upside is that you can use metal scrapers and wire brushes freely without worrying about chipping, and the grates can be re-seasoned repeatedly to maintain performance indefinitely.
Why it’s great
- Thick matte cast iron bars resist warping under high heat
- Fits both 4-burner and 5-burner Nexgrill frames
- Allows aggressive cleaning with metal tools
Good to know
- Requires diligent seasoning to prevent rust after first season
- No coating means no initial nonstick surface
FAQ
Can I use stainless steel grill brushes on porcelain-coated grates?
How do I measure my grill for the correct grate size?
Why do my new cast iron grates rust after one wash?
Are stainless steel grates better than cast iron for coastal homes?
Final Thoughts: The Verdict
For most users, the grates for gas grill winner is the Hongso 17.5″ set for Weber Spirit because the matte cast iron construction is thicker than OEM grates, passes SGS safety certification, and delivers consistent searing across the entire 416-square-inch surface. If you want rust-proof convenience and dishwasher-safe cleaning, grab the Hisencn 201 stainless steel grates for Nexgrill. And for restoring a Charbroil Tru-Infrared, nothing beats the BBQration three-piece set with its factory-fit design and beveled edges.