Material: 38CrMoAl

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