Hongso Porcelain-Enameled Cast Iron Grill Grates for Char-Broil Signature 3-Burner — 18 1/16 x 22 1/16 in, 3-Piece Set, Heavy-Duty

These Hongso replacement grill grates are a three-piece porcelain-enameled cast iron set sized 18 1/16 x 22 1/16 inches made to fit Char-Broil Signature 3-burner models for even heat and lasting searing performance.

If your Char-Broil Signature 3-burner grill needs new cooking grids, this Hongso set provides one large grate and two narrow grates manufactured from heavy-duty porcelain-enameled cast iron. The set is designed as a direct-fit replacement for original part numbers such as G470-0003-W1, G470-0002-W1, G321-0005-W1 and G321-0006-W1 and restores dependable heat transfer, attractive sear marks, and extended grill life when installed correctly.

Will these grates fit my Char-Broil Signature 3-burner model?

These grates are made to match the common Char-Broil Signature 3-burner cooking grid layout: one larger center grate plus two narrower side grates that together measure 18 1/16" by 22 1/16". Fit depends on your grill’s exact part number and original grate layout, so compare measurements before purchase.

• Compatible replacement for part numbers G470-0003-W1, G470-0002-W1, G321-0005-W1, G321-0006-W1.
• Includes one large grate 18 1/16" x 9 1/4" plus two narrow grates 18 1/16" x 6 1/2".
• Total footprint: 18 1/16" x 22 1/16" when assembled in grill bed.
• Verify by removing original grate and measuring before ordering.

How do these porcelain-enameled cast iron grates perform on heat and searing?

The grates are made from thick cast iron rods (about 10.25 mm diameter) coated in porcelain enamel to combine cast iron’s heat retention with a protective, easy-to-clean finish. They distribute heat evenly across the cooking surface, produce distinct grill marks, and hold temperature well for consistent searing.

• 10.25 mm rod diameter for steady heat conduction and sear lines.
• Porcelain enamel reduces sticking and simplifies cleanup compared with raw cast iron.
• Heavy-duty construction extends the functional life of the grill grates.
• Retains original food flavor by sealing in juices and providing even cooking.

What are the recommended cleaning and care steps to keep these grates lasting?

Porcelain-enameled cast iron needs gentle care to preserve its coating and performance. Clean with hot water and mild detergent when cool, use a soft brush to remove debris, and avoid abrasive cleaners or steel wool that could chip the enamel.

• Soak in hot, soapy water for a few minutes before light scrubbing.
• Use a soft-bristled brush — never steel wool or harsh scourers.
• Do not use dishwasher soap or machine cycles; air-dry fully before storage.
• Store in a sealed bag after drying to prevent moisture-related damage.

How should I confirm compatibility and install the replacement grates?

Before ordering, remove the old grates and compare their dimensions and mounting points with the Hongso set. Installation is typically a simple lift-and-set operation: place the two narrow side grates and then the larger center grate into the grill bed, ensuring they sit flat and stable over the burners.

• Compare the original part to the listed dimensions (18 1/16" x 9 1/4" and 18 1/16" x 6 1/2").
• Check that brackets or ledges in your grill align with the grate edges before finalizing purchase.
• Install when grill is cool; confirm grates sit level and do not wobble over burners.
• Retain your owner’s manual part references to verify fit if unsure.

Who is this for? This Hongso porcelain-enameled cast iron grate set is intended for Char-Broil owners who need a direct-fit, durable replacement for worn or damaged cooking grids on Signature 3-burner gas grills. It suits backyard cooks who want better heat retention and clearer sear marks without replacing the entire grill, and for anyone who prefers the durability of cast iron with an enamel finish that eases cleanup. If you have the listed Char-Broil part numbers or matching measurements and want to restore consistent cooking performance, this set is a practical, economical choice.