Conforming to ANSI,DIN,JINS,ISO standard, For the Nonstandard parts ... Stamping > Induction Harden teeth > Finishing machining > Painting 2. Material: Alloy Steel, Quality Carbon Structural Steel, Cast Iron, Brass etc. 3 ... . Heat Treatment: Induction harden with High/Middle Frequency ... you in the near future. X,V,W welding Sprockets and Hubs