If your grill grates are warped, rusted, or no longer holding heat evenly, a cast iron upgrade can make a big difference. The right replacement improves searing, restores cooking performance, and helps your grill feel new again.
This roundup focuses on cast iron cooking grates replacement options chosen for compatibility, build quality, and practical fit across popular gas grill brands and models.
Best 10 Cast Iron Cooking Grates Replacement Picks for 2026
Exact-Fit Cast Iron Swap
Nexgrill 4/5 Burner Replacement Grates
- 2-pack cast iron set
- Fits many Nexgrill models
- Built for heat retention and searing
Best For: Compatible Nexgrill owners wanting a durable cast iron replacement
Heavy-Duty Char-Griller Set
- 4-piece cast iron set
- Fits many Char-Griller models
- Heavy-duty direct-heat design
Best For: Char-Griller and King Griller owners needing a full replacement set
Broad-Fit Dyna-Glo Set
- 3-piece set with diamond grate
- Fits Dyna-Glo and more brands
- Made for heat retention and searing
Best For: Dyna-Glo owners wanting a cross-brand compatible replacement
Weber Genesis II Upgrade
- 3-piece heavy cast iron set
- Fits Genesis II and Genesis 400 series
- Larger rods for better heat retention
Best For: Weber Genesis II or newer Genesis 400 Series owners
Heavy-Duty Nexgrill Fit
13 x 17 Cast Iron Cooking Grate Replacement
- 2-pack matte cast iron grates
- Fits many Nexgrill, Kenmore, and Uniflame models
- 17" x 13 1/4" per grate
Best For: Compatible grill owners needing a broad-fit cast iron replacement
Char-Griller Multi-Model Set
19 3/4 Inch Cast Iron Grates for Char-Griller
- 4-pack set for larger grills
- Fits many Char-Griller and King Griller models
- Heavier cast iron for heat retention
Best For: Large Char-Griller or King Griller grills needing a full replacement set
Weber-Compatible Heavy Cast Iron
17.5" 2-Pack for Spirit & Genesis
- Cast iron set of 2 grates
- 17.5" x 11.9" per grate
- Fits many Weber Spirit and Genesis models
Best For: Compatible Weber owners needing a heavy-duty replacement grate set
Dyna-Glo Fitmate Cast Iron
- Fits select Dyna-Glo and Kenmore grills
- Porcelain-coated cast iron build
- Includes 1 diamond grate and 2 cooking grates
Best For: Compatible Dyna-Glo or Kenmore grill owners seeking a durable replacement
Porcelain-Coated Multi-Fit Grates
- Porcelain-coated cast iron pair
- Fits Grill Master, Nexgrill, and others
- Designed for heat retention and searing
Best For: Multi-brand grill owners who want porcelain-coated cast iron performance
Exact-Fit Cast Iron Swap – Nexgrill 4/5 Burner Replacement Grates
If you need cast iron cooking grates replacement parts for a compatible Nexgrill, this 2-pack is built around common 4- and 5-burner models and original part numbers. The matte cast iron construction is meant to hold heat well, create strong sear marks, and give you a durable alternative to porcelain-coated grates.
Best For: Owners of compatible Nexgrill, Charbroil, Expert Grill, Cuisinart, Kenmore, and select other gas grills who want a heat-retaining cast iron upgrade.
Pros:
- 2-pack set covers 17″ x 13 1/4″ each, or 17″ x 26 1/2″ total.
- Matte cast iron construction is designed for heat retention and sear marks.
- Fits a wide list of Nexgrill, Charbroil, Expert Grill, Cuisinart, and Kenmore models.
- Durable build is positioned as an alternative to porcelain-enamel grates.
Cons:
- Fit depends on matching model numbers and dimensions.
- Cast iron typically needs care to avoid rust.
Overall, this is a practical replacement if your grill matches the listed part numbers and burner configurations. The main draw is straightforward cast iron performance: solid heat retention, good searing, and broad compatibility.
Heavy-Duty Char-Griller Set – 4-Pack Cast Iron Grid Grates
For Char-Griller and King Griller owners, this cast iron cooking grates replacement set is aimed at wide compatibility and a full 4-pack layout. The grates are sized to match the listed models and use gloss cast iron for heavy-duty grilling and direct-heat cooking.
Best For: Char-Griller or King Griller users who need a four-piece replacement with model-specific sizing.
Pros:
- 4-pack set fits many Char-Griller and King Griller model numbers.
- 19 3/4″ x 6 3/4″ each, 19 3/4″ x 27″ overall.
- Gloss cast iron build is described as heavy duty for outdoor grilling.
- Works for both charcoal and gas grill setups listed in the notes.
Cons:
- Cast iron is fragile and may arrive broken if not handled carefully.
- You should confirm measurements before ordering.
This is a strong fit-first option if you already know your Char-Griller or King Griller model. Its value is in the large 4-piece configuration and the heavy-duty cast iron material, but careful measurement is important.
Broad-Fit Dyna-Glo Set – 3-Piece Cast Iron Grates
This cast iron cooking grates replacement set is built for Dyna-Glo 4- and 5-burner grills, with compatibility that also reaches several Kenmore, Backyard, and Uniflame models. The package includes one diamond grate plus two cooking grates, and the cast iron design is meant to hold heat well and produce clear sear marks.
Best For: Dyna-Glo grill owners who want a three-piece cast iron replacement with broad cross-brand compatibility.
Pros:
- 3-piece package includes 1 diamond cast iron grate and 2 cooking grates.
- Fits several Dyna-Glo 4/5 burner models plus select Kenmore, Backyard, and Uniflame grills.
- Designed for heat retention and strong grill marks.
- Gift-style packaging is noted for added shipping protection.
Cons:
- You should compare dimensions with your original parts before ordering.
- Cast iron needs regular care to help prevent rust.
For shoppers comparing replacement parts across multiple grill brands, this set stands out for its broad compatibility list. It is best when your current grates match the listed part numbers and size expectations.
Weber Genesis II Upgrade – Heavy Cast Iron Grill Grates
If you are shopping for cast iron cooking grates replacement parts for Weber Genesis II or newer Genesis 400 Series grills, this set is aimed at those larger models. It uses 3 cast iron grates with heavier solid rods and is marketed for high heat retention, even heat distribution, and searing performance.
Best For: Weber Genesis II and Genesis 400 Series owners looking for a heavier cast iron grate upgrade.
Pros:
- 3-piece set measures 18 3/4″ x 11 1/4″ each, 18 3/4″ x 33 3/4″ total.
- Fits Genesis II 400/LX 400 series and newer Genesis 400 series models.
- Heavy cast iron rods are described as larger diameter and more durable.
- Built for even heat, fast cooking, and strong sear marks.
Cons:
- Compatibility depends on matching both size and model year.
- Cast iron care is still required to keep the grates in good shape.
This is the most targeted option in the group for Weber Genesis owners who want a sturdier cast iron replacement. The key advantages are the heavier rod design and the broad but still model-specific Weber fit list.
Heavy-Duty Nexgrill Fit – 13 x 17 Cast Iron Cooking Grate Replacement
If you need cast iron cooking grates replacement parts for a compatible Nexgrill, this 2-pack is built around a broad fit list and a practical 17 x 13 1/4 inch size per grate. The matte cast iron construction is aimed at heat retention and strong sear marks, while the notes also call out easy maintenance with prompt drying and light oiling after use.
Best For: Owners of compatible Nexgrill, Kenmore, Uniflame, Charbroil, or similar grills who want a cast iron 2-pack with broad model coverage.
Pros:
- Fits many Nexgrill 4-burner and 5-burner models, plus several Charbroil, Kenmore, Expert Grill, and Uniflame units.
- Matte cast iron helps retain heat and supports better grill marks.
- 2-pack layout covers a 17″ x 26 1/2″ total cooking area.
- Lists multiple original part numbers for easier replacement matching.
Cons:
- Compatibility depends on matching your original grate size and model number.
- Cast iron needs drying and oiling after cleaning to reduce rust risk.
This is a sensible option if your main goal is a close replacement with wide brand compatibility. Just verify the dimensions and part references before ordering.
Weber Q Series Sear Upgrade – 7645 Cast Iron Grill Grates for Weber Q Series
For Weber Q-series owners looking for cast iron cooking grates replacement parts, this 2-pack is sized for Q200, Q220, Q2000, Q2200, Q2400, and 53060001 models. The matte cast iron build is designed to hold heat well, and the split design with included support clips makes it a straightforward repair-oriented option.
Best For: Weber Q-series users who want a heat-retaining cast iron replacement with included support clips.
Pros:
- Fits Weber Q200, Q220, Q2000, Q2200, Q2400, and 53060001 models.
- Matte cast iron is built for even heating and strong searing.
- 2-pack split design includes support clips as a gift.
- Replacement for Weber 7645, with size guidance listed in the notes.
Cons:
- You should compare your original grate size before buying.
- Cast iron requires routine scraping, oiling, and dry storage to help avoid rust.
This is a practical pick if your Weber Q grill needs new grates and you want a searing surface rather than a lightweight substitute. The fit list and included clips make it especially useful for a direct replacement search.
Char-Griller Multi-Model Set – 19 3/4 Inch Cast Iron Grates for Char-Griller
If you are shopping cast iron cooking grates replacement parts for a Char-Griller or King Griller gas grill, this 4-pack is aimed at a long list of compatible models. Each grate measures 19 3/4″ x 6 3/4″, and the notes emphasize heavier construction, better heat retention, and stronger grill marks for everyday BBQ use.
Best For: Char-Griller and King Griller owners who need a 4-pack replacement with broad model coverage.
Pros:
- Fits many Char-Griller models, including 5050, 5650, 2121, 3001, 3072, and more.
- Also fits King Griller 3008 and 5252 gas grills.
- Matte cast iron improves heat retention and searing performance.
- 4-pack set covers a full 19 3/4″ x 27″ cooking area.
Cons:
- Cast iron grates can be fragile in shipping, according to the notes.
- Needs high-temperature oiling to help reduce sticking and rust.
This option stands out when you need a full multi-grate replacement rather than a single insert. It is especially useful for owners of larger Char-Griller setups who want sturdy cast iron over porcelain-coated parts.
Weber-Compatible Heavy Cast Iron – 17.5" 2-Pack for Spirit & Genesis
If you need cast iron cooking grates replacement for a compatible Weber gas grill, this 2-pack is built around exact sizing and broad model coverage. Each grate measures 17.5″ x 11.9″, and the set totals 17.5″ x 23.8″, so it is worth measuring your original parts before ordering.
Best For: Owners of compatible Weber Spirit and Genesis grills who want a heavy cast iron replacement set.
Pros:
- Made of cast iron for long-lasting, durable use.
- Matches a wide range of Weber Spirit, Genesis, and related model references.
- Comes as a set of 2 grates, covering the full cook surface listed.
- Supplier includes care guidance for seasoning, cleaning, and storage.
Cons:
- Cast iron grates are fragile and may break during transportation.
- Fit depends on matching the size and original model carefully.
This is a practical replacement if your current Weber grates are worn and you want a heavier cast iron option. The tradeoff is that fit checks matter, but the broad compatibility list and material strength make it a solid maintenance buy.
Dyna-Glo Fitmate Cast Iron – 70-01-911 Replacement Grates
For shoppers looking for cast iron cooking grates replacement for select Dyna-Glo and Kenmore grills, this model focuses on fit and heat performance. It is listed for several Dyna-Glo, Kenmore, Backyard, and Uniflame grill models, and the porcelain-coated cast iron build is meant to spread heat evenly and clean up easily.
Best For: Owners of compatible Dyna-Glo, Kenmore, or Backyard grills who want durable replacement grates.
Pros:
- Compatible with multiple Dyna-Glo, Kenmore, Backyard, and Uniflame model references.
- Porcelain-coated cast iron helps with even heat distribution and consistent grilling.
- Anti-stick surface makes cleanup easier and faster.
- Package includes 1 diamond cast iron grate and 2 cast iron cooking grates.
Cons:
- Compatibility is model-specific, so measurements and model matching are important.
- The notes advise against soaking the grate in water for long periods.
This is a useful replacement if your current grate set is due for an update and your grill model is on the fit list. The porcelain-coated cast iron construction gives it a durable, easy-care profile without overcomplicating installation.
Porcelain-Coated Multi-Fit Grates – 17 1/8" Replacement Pair
If you need cast iron cooking grates replacement for a compatible mid-size gas grill, this pair is designed around a broad list of supported models. The porcelain-coated cast iron construction is meant to retain heat well, produce strong sear marks, and offer a non-stick surface that is easier to clean.
Best For: Owners of compatible Grill Master, Nexgrill, Master Forge, and similar gas grills who want a heat-retaining grate set.
Pros:
- Fits a long list of grill brands and model numbers, including Grill Master and Nexgrill.
- Porcelain-coated cast iron helps retain heat and deliver professional searing.
- Non-stick surface supports easier cleanup.
- SGS testing is listed for safety and compliance reassurance.
Cons:
- You need to measure your original part before ordering.
- Compatibility is broad, but still model-dependent.
Overall, this is a strong replacement option if you want cast iron performance with a more forgiving porcelain-coated finish. The wide compatibility list is a plus, but confirming dimensions is still the key step before buying.
How We Picked These Cast Iron Cooking Grates Replacement Options
We prioritized exact model compatibility first, since grill grate sizing and support points vary widely. Next, we looked at cast iron thickness, coating type, section count, and whether the listing clearly matched common grill models from Weber, Nexgrill, Char-Griller, Dyna-Glo, and similar brands. We also favored options that balance heat retention, easier cleaning, and straightforward installation.
Quick Comparison
Most shoppers will find their best match by comparing three things: exact grill model, grate dimensions, and number of pieces in the set. One-piece grates can be simpler to handle, while multi-pack replacements may better match the original layout on larger grills. If you want stronger searing and more even browning, heavier cast iron usually outperforms thinner alternatives.
Key Buying Factors for Cast Iron Cooking Grates Replacement
Fit and Model Compatibility
Confirm the grill brand, model number, and burner layout before buying. A grate that is only slightly off in length or support width may sit unevenly, which can affect heat distribution and stability.
Material and Coating
Plain cast iron offers excellent heat retention, while porcelain-coated cast iron can be easier to clean and somewhat more resistant to corrosion. If you grill often and want better searing, uncoated or heavy cast iron is usually the stronger choice, but it may require more careful maintenance.
Thickness and Weight
Thicker grates generally hold heat better and leave stronger sear marks. They can also last longer, though they may be heavier and a little harder to remove for cleaning.
Maintenance Needs
Cast iron works best when it is kept dry and lightly oiled after cleaning. If low maintenance matters most, choose a coated option and still plan on routine care to slow rust.
Who Should Buy Which Cast Iron Cooking Grates Replacement?
If you want the closest factory-style fit, choose the exact-model replacement over a universal option. If your priority is better searing and heat retention, go with a heavy cast iron set that matches your grill dimensions precisely. If you want easier cleanup and a little more rust resistance, consider porcelain-coated cast iron. For shoppers replacing multiple sections on a larger grill, a matched multi-piece set is often the most convenient and cost-effective Cast Iron Cooking Grates Replacement choice.
In short, the best option is the one that matches your grill exactly, supports your cooking style, and gives you the heat control you expect from cast iron.