... , Free Cutting Steel Wire, Nipple Steel Wire2. Chemical Composition (%)Steel Grade/Material Carbon%Silicon%Manganese%Phosphorus%Sulphur %Chromium%Nickel%Cuprum%Q1950 ... -1991, DIN17223-1, EN10270-1, GB 3206-824. Tensile strength : Grade B, Grade C, SL, SM, DM, SH, DH, SWA, SWB, SWC5. Main ...