1) grade Ck50 Ck55, Ck60 ,Ck67,Ck70,C75Cr1,3Cr13,60Si2Mn
2) tolerance and flatness basic standard DIN and GB/T699-1999
Annealed cold rolled steel strip /coil/sheet1.material grade : ck50,ck55,ck60,ck67,ck70,c75Cr1,3Cr13,6cr13,50CrV4,60Si2Mn etc2.thickness 0.15-2.5mm ,...