304 stainless steel is one of the most widely used chromium – nickel stainless steel, as a widely used steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Stamping, bending and other thermal processing, no heat treatment hardening phenomenon (use temperature -196℃ ~ 800℃). Corrosion resistance in the atmosphere.304 stainless steel is widely used in curtain wall, side wall, roof and other building purposes