GMW3399M-ST-S CR 980T/550Y DP Dual Phase — Cold Rolled Steel

GMW3399M-ST-S CR 980T/550Y DP is a dual phase grade cold rolled steel conforming to the gm material specifications. At 550 MPa minimum yield strength, this is ultra-high-strength steel for door intrusion beams, bumper reinforcements, and tunnel structures, with very high tensile properties for peak structural performance in anti-intrusion and rollover protection members.

This specification carries the dual-phase (DP) designation under GMW3399M with ferrite-martensite microstructure for energy absorption in crash structures.

As a Dual Phase steel, GMW3399M-ST-S CR 980T/550Y DP offers a specific combination of strength and formability engineered for advanced automotive manufacturing. The dual-phase microstructure of ferrite and martensite provides excellent work hardening and crash energy absorption.

Ameristeel maintains inventory of GMW3399M-ST-S CR 980T/550Y DP 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 GMW3399M-ST-S CR 980T/550Y DP include Galvanized, Galvanneal, Electrogalvanized, providing corrosion protection and surface preparation suited to your manufacturing process requirements.

GMW3399M-ST-S CR 980T/550Y DP at 550 MPa yield and 980 MPa tensile compares to GMW3032M-ST-S HR550LA (0 MPa lower yield at 550 MPa) and GMW3399M-ST-S CR 690T/550Y-DP (0 MPa lower yield at 550 MPa and 980 MPa vs 690 MPa tensile). Selecting the right grade depends on the balance between strength requirements and forming complexity for your specific stamping application.