Cold-rolled high quality carbon structural steel strip S20C S58C S40C S45C Cold-rolled low-carbon steel strip SPCC SPCC-SD Cold-rolled alloy structural steel strip SCr440 SCM415 SCM420 SCM440 Cold-rolled spring steel strip 0.05*2.5*10-260*20000-350000 SUP3 Cole-rolled carbon tool steel strip SK4 SK5 SK6 SK7 delivery condition: full hard ,annealed, pickle and oiled ASTM DIN ,JIS