Product overview：
Base material:
(1) 38CrMoAlA(JIS SACM645)
(2)42CrMo(AISI 4140)
Treatment process:
1. Heat treatment
2. Nitriding treatment
Technical parameters:
1. Nitriding depth: 0.4mm-0.6mm
2. Nitriding hardness: 850-950hv
3. Nitriding brittleness: ＜ = 1
4. Surface roughness: Ra0.4
5. Straightness of screw: 0.015mm
