GMW3032M-ST-S HR420LA HSLA Grade 60 — Hot Rolled Steel

Coatings: Galvanized, Galvanneal, Electrogalvanized

Material Type

Hot Rolled

Grade

HSLA Grade 60

Available Coatings

GalvanizedGalvannealElectrogalvanized

Standard

GM Material Specifications

General Motors (GM) material standards — including GMW2M-ST-S and GMW3032M/3399M designations — define steel grades for GM vehicle platforms. Ameristeel supplies GM-specified cold rolled and hot rolled steel in drawing quality, bake-hardenable, HSLA low-alloy, and advanced high-strength dual-phase (AHSS) grades with galvanized, galvanneal, and electrogalvanized coating availability. These specifications govern material selection for body panels, structural reinforcements, and crash-management components across GM's vehicle lineup. Stocked in coils and sheets at our Fraser, MI facility, with blanking, slitting, and cut-to-length processing for prototype builds and high-volume production orders. Request a quote for GM-spec steel shipped to Warren, Detroit, and throughout Southeast Michigan

Yield Strength

420 MPa

Minimum yield point

About GMW3032M-ST-S HR420LA

GMW3032M-ST-S HR420LA is a hsla grade 60 grade hot rolled steel conforming to the gm material specifications. At 420 MPa minimum yield strength, this is high-strength steel for front-end structure components, rocker inners, and A-pillar reinforcements.

This specification carries the low-alloy (LA) designation under GMW3032M with micro-alloyed composition for structural strength with good weldability.

Ameristeel carries GMW3032M-ST-S HR420LA across a range of gauges and widths in hot rolled form, available as coils, sheets, or custom-cut blanks. With 420 MPa minimum yield strength, this hsla grade 60 specification requires precise handling and testing — our ISO 9001:2015 certified processes include third-party laboratory verification on every incoming coil.

GMW3032M-ST-S HR420LA is supplied with the following coating options: hot-dip galvanized (zinc) for general corrosion resistance; galvanneal (zinc-iron alloy) for superior paint adhesion and weldability; electrogalvanized for precise coating weight control and smooth surface finish. At 420 MPa yield, the coating selection for GMW3032M-ST-S HR420LA should account for forming severity and post-stamping corrosion exposure in the final application.

GMW3032M-ST-S HR420LA at 420 MPa yield compares to GMW3032M-ST-S CR420LA (0 MPa lower yield at 420 MPa) and GMW3399M-ST-S CR 590T/420Y-DP (0 MPa lower yield at 420 MPa). Selecting the right grade depends on the balance between strength requirements and forming complexity for your specific stamping application.

GMW3032M-ST-S HR420LA is an OEM-specific grade developed to meet General Motors engineering requirements for vehicle body and structural applications. Ameristeel supplies General Motors-specified steel grades directly to Tier 1 and Tier 2 automotive suppliers throughout Southeast Michigan, with full material traceability and third-party test reports on every coil. Our Fraser, MI steel processing facility maintains dedicated inventory of GMW3032M-ST-S HR420LA to support just-in-time delivery schedules, and our ISO 9001:2015 quality system ensures that every shipment meets the exact mechanical property, surface quality, and dimensional tolerances required by General Motors production standards.

Ameristeel offers in-house processing for GMW3032M-ST-S HR420LA at our Warren and Fraser, Michigan facilities. Available processing capabilities include precision slitting to custom widths on our multi-cut blanking line, cut-to-length sheet processing for exact dimensional requirements, laser cutting of high-strength profiles on our TRUMPF fiber laser with up to 4kW power, shear processing for rapid sheet production. From raw material sourcing through finished part delivery, Ameristeel provides a single-source solution — eliminating the need to coordinate between separate steel suppliers, service centers, and fabrication shops. Learn more about our laser cutting capabilities, production steel sales, or request a quote for processing GMW3032M-ST-S HR420LA to your exact specifications.