RMS-1021 CR-550Y-650T-LA HSLA — Cold Rolled Steel

RMS-1021 CR-550Y-650T-LA is a hsla grade cold rolled steel conforming to the rivian material specifications. At 550 MPa minimum yield strength, this is ultra-high-strength steel for door intrusion beams, bumper reinforcements, and tunnel structures, with high tensile capacity for safety-critical crash path components requiring controlled collapse behavior.

As a Low Alloy / HSLA steel, RMS-1021 CR-550Y-650T-LA offers a specific combination of strength and formability engineered for advanced automotive manufacturing. This advanced high-strength classification meets demanding structural performance requirements.

Ameristeel maintains inventory of RMS-1021 CR-550Y-650T-LA in various gauges and widths, available as coils, sheets, or custom blanks. Our ISO 9001:2015 certified processes ensure consistent quality from prototype through production volumes.

Available coating options for RMS-1021 CR-550Y-650T-LA include Uncoated, Galvanized, Electrogalvanized, Galvannealed, Zinc-Magnesium-Aluminum, providing corrosion protection and surface preparation suited to your manufacturing process requirements.

RMS-1021 CR-550Y-650T-LA at 550 MPa yield and 650 MPa tensile compares to RMS-1021 HR-550Y-610T-LA (0 MPa lower yield at 550 MPa and 650 MPa vs 610 MPa tensile) and RMS-1021 CR-590Y-980T-DP (40 MPa lower yield at 590 MPa and 650 MPa vs 980 MPa tensile). Selecting the right grade depends on the balance between strength requirements and forming complexity for your specific stamping application.