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GM GMW material specifications

General Motors writes its material requirements as GMW specifications, and every GM-tier stamper quotes them. The list below is the GMW steel designations we hold, including the CR, HDG and AHSS families used on body and chassis parts.

157 material designations

Every designation below is one we are asked to quote. Send us the code together with the thickness, width, coating and volume and we will come back with the mill source and a price.

Designations as published in the standard. Where the standard does not publish mechanical values we do not invent them — we quote against your specification and the mill test certificate governs.

Quoting GM (GMW) grades?

Send the designation, thickness, width, coating and annual volume. We reply with the grade window, the mill source and a price — normally within one working day.

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