What is the saph440 steel composition?

saph440 steel is automotive structural steel pickling steel. The executive standard is Q/BQB 310-2009. Elongation ≥30, tensile strength ≥440Mpa, yield strength ≥305Mpa.

The saph440 steel chemical composition (melting analysis)%

C: ≤0.21

Si: ≤0.30

Mn: ≤1.50

P: ≤0.030

S: ≤0.025

Alt ：≥0.01

Hot-rolled pickled steel saph440 sheets are a new type of steel required by the automotive industry. With better surface quality, thickness tolerance, and processing performance, it can replace body panels and auto parts produced with cold-rolled sheets in the past, thereby reducing raw material costs10 %about. With the development of the economy, the production of automobiles has also increased significantly, and the use of plates has continued to increase. The original design of many vehicle models in the domestic automobile industry requires the use of hot-rolled pickled plates, such as: car subframes, wheel spokes, front and rear Bridge assembly, truck box plate, protective net, automobile beam and spare parts, etc. Due to the shortage of domestic hot-rolled pickled plates, automobile factories generally use cold plates or hot plates instead or pick them by themselves.