MS 50002-LAC 550Y-620T HSLA Grade 80 — Cold Rolled Steel

MS 50002-LAC 550Y-620T is a hsla grade 80 grade cold rolled steel conforming to the fiat/chrysler specifications. At 550 MPa minimum yield strength, this is ultra-high-strength steel for door intrusion beams, bumper reinforcements, and tunnel structures, with substantial tensile reserve for energy-absorbing crush zones and progressive deformation members.

This specification uses the cold-rolled low-alloy (LAC) process route, providing tight thickness tolerances and controlled surface roughness for precision stamping.

MS 50002-LAC 550Y-620T is a Low Alloy / HSLA steel at 550 MPa yield and 620 MPa tensile. Micro-alloying elements in MS 50002-LAC 550Y-620T — typically niobium, vanadium, or titanium — provide grain refinement and precipitation strengthening, delivering structural-grade mechanical properties with good weldability and formability for automotive and industrial applications.

Ameristeel stocks MS 50002-LAC 550Y-620T in production-ready gauges and widths suited to high-strength stamping applications. As a 550 MPa yield cold rolled product, this specification is available in coil, sheet, and precision-blanked formats. Our ISO 9001:2015 certified facility triple-tests every coil (ID, OD, and center) to verify mechanical properties remain consistent throughout the entire length.

MS 50002-LAC 550Y-620T 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 550 MPa yield, the coating selection for MS 50002-LAC 550Y-620T should account for forming severity and post-stamping corrosion exposure in the final application.

MS 50002-LAC 550Y-620T at 550 MPa yield and 620 MPa tensile compares to MS 50002-LAH 550Y-620T (0 MPa lower yield at 550 MPa and 620 MPa vs 620 MPa tensile) and MS 50002-MCH 550Y-600T (0 MPa lower yield at 550 MPa and 620 MPa vs 600 MPa tensile). Selecting the right grade depends on the balance between strength requirements and forming complexity for your specific stamping application.

MS 50002-LAC 550Y-620T is an OEM-specific grade developed to meet Stellantis (Fiat/Chrysler) engineering requirements for vehicle body and structural applications. Ameristeel supplies Stellantis (Fiat/Chrysler)-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 MS 50002-LAC 550Y-620T 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 Stellantis (Fiat/Chrysler) production standards.

Ameristeel offers in-house processing for MS 50002-LAC 550Y-620T 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, press brake forming on our TruBend series with up to 110-ton capacity and 120" bend length. 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 MS 50002-LAC 550Y-620T to your exact specifications.