Dear Sir, We are looking for a supplier of cold rolled steel SPCE-4B (JIS Norms) or ST4 K40 (DIN Norm 1624:1.0338) Thikness 0.8 mm. and Hardness 115-150 HV or 65-80 HRB The first purchase will be 5 Tons. The material needs to be supplied to our factory in Mainland China.