... quenched and tempered,tempering,carburizing,nitriding,carbonitriding and so on.6.Surface Treatment:Include plating of Ni,Cr3+,Zn-Ni, ... teeth grinding.9. forging: can forget different materials:common carbon steel, special steel, stainless steel, brass, bronzs ,aluminum and so on . 3)Lead ... best quality and mutual benefit and win-win all buyers. 6)Staff details:Production Staff: 100 to 300QC Staff: 10 ...