Carbon Steel Coil Spring 1) Material: 62Si2MnA, 65Mn, SK3,SK4, SK5, SUS301, ... 2) Thickness: 0.1-3.0mm 3) Width: 3-80mm Carbon Steel Coil Spring1) Material: 62Si2MnA, 65Mn, SK3,SK4, SK5, SUS301,3042 ... are specialized in producing springs for various kinds of carbon and stainless steel products and supplies high elastic and heat treatment stainless steel &carbon steel.