with 40Cr material. It divides into two catalogues:cold galvanizing and hot galvanizing,which are environmental-friendly. Mechanical performance level 8.8With 40Cr material. It divides into two catalogues:cold galvanizing and hot galvanizing,which are environmental-friendly. The hardness of the former is above 5um, and the latter can be over 53um.Warmly welcome to our factory and consult the ...