Abstract: The chemical composition and hot rolling process of hot-rolled pickled sheet SAPH440 were introduced. The microstructure, mechanical properties, formability and surface quality were analyzed. The results show that the microstructure is ferrite and pearlite, and the grain size is 11.7-12.0 level. The tensile properties have good stability in all coils, and the difference in each direction is small. The plastic strain ratio is between 0.83-0.94, and the strain hardening exponent is between 0.17-0.19. The flanging forming ability is good, and the hole expanding rate is 77.3%-93.6%. The surface roughness is 1.35-1.82 μm. The steel has a high cold bending property and surface quality.