Material: 38CrMoAlA

Technical Specification
1.hardness after hardening & tempering: HB280-320
2.nitrided hardness:HV850-1000
3.nitrided cass depth:0.45-0.7mm
4.nitrided brittleness:less than grade 2
5.surface roughness: Ra0.4
6.screw straightness:0.015mm
7.surgace chromium-plating's hardness after nitriding:>900HB
8.chromium-plating depth:0.05-0.10mm
9.alloy hardness:HRC56-65
10.alloy depth:0.8-2.0mm