Large stock competitive price good quality Cold Work Steel O1: 1,Grade:Cold work mould steel(O1/9CrWMn/DIN 1.2510/SKS3/90MnWCrV5). 2,Specification:Dimension:20-500MM*50-1200MM. 3,Chemical composition: C=0.85~0.95,Mn=1.0~1.3,Si=0.20~0.40,S≤0.025,W=0.40~0.60,Cr=0.40~0.60,V=0.20 4,Annealed Hardness:HBS≤228 5,Application:Used for making mini surface and shape complexed cold die.