TechnicianVision · Knowledge base
Straightening And Heat: General Motors
I-CAR · May 20, 2020 · General Motors, Chevrolet, GMC, Cadillac, Buick
Summary
This document outlines General Motors' strict guidelines regarding the use of heat during structural straightening. It specifies that heat must never be used on ultra-high-strength steel (UHSS) or dual-phase steels, while mild steel and high-strength low alloy (HSLA) steel may be heated up to 650°C (1200°F) for a maximum of two 90-second intervals.
What to do on the job
Never apply heat to ultra-high-strength or dual-phase steels, and strictly limit heat on mild or HSLA steels to a maximum of 650°C (1200°F) for up to two 90-second intervals.
How to use it
Use this document to justify the replacement rather than the straightening of damaged ultra-high-strength or dual-phase steel components. It can also be used to support the labor time required for controlled heating setups and monitoring when repairing mild or HSLA steels according to GM's precise temperature and time limits.
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