... :AGMA12 Spiral Bevel Gear for gear box 1) Material: 42CrMo, 35CrMo, 17CrNiMo , 20CrMnMo, 20Cr2Ni4, , 20CrMnTi and so on or according client ... 2) Tooth heattreatment: Carburization , hardness HRC55-60 and deep 1.3-2mm and good way control heattreatment distortion Ion nitrification HRC58 ... Dia. 2000mm2. Max mould :30 mould Custormer's drawing and samples are welcome crown wheel and pinion for gear box