desc: Has good mechanical processing performance and better corrosion resistance, with beautiful crystal structure on the surface, suitable for construction, home appliances and other internal and external covering parts and structural parts that have higher requirements for formability and corrosion resistance.
1. When there is no obvious yield, use Rp0.2; otherwise use Rel. Structural steel uses ReH.
2. When the nominal thickness of the product is greater than 0.5mm but less than 0.7mm, the elongation after fracture is allowed to decrease by 2%; when the nominal thickness of the product is less than 0.5mm, the elongation after fracture is allowed to decrease by 4%.