materials:

STKM11A,STKM12A,STKM13A,STKM14A

STKM12B,STKM13B

STKM12C,STKM13C,STKM15C,STKM45C

SCM145

SAE1008,SAE1010,SAE1015,SAE1017,SAE1018,SAE1020

ASTM A179,4130,SS400,SAPH440,ST52-3BK,SWCH10R