... carbon steel, alloy steel and also stainless steel, such as AISI1045, 42CrMo4, AISI304, etc.*. Heat treatment: annealing,normalization, ... quenching or tempering. Customer can also choose to do final heat ... parts,Marine hoists,etc.*. Surface treatment: painting, shot blasting or anti-rust oil*. OEM is also welcome.*. Corrosion resistance ...