hard chrome plated shock absorber piston rod

hard chrome plating piston rod for shock absorber, widely used in vehicles,gas spring,hydraulic cylinder...
1. material: according to buyer request (GB45/ S45C/ C45; GB35/ S35C/ C35; Cr40)
2. specification: dia.8~dia.40mm
3. lenght: 100~600mm
4. straightness: 0.01
5. roundness: 0.005
6. surface roughness: 0.05~0.08
7. induction hardness: HRC40~HRC58
8. case depth: 0.4~1.5
9. thickness of chromed: 15~25
10. hardness: 900Hv~1200Hv
11. cracks: 30~60/mm
12. salt spray: 48hrs~120hrs
13. dehydrogenation
hard chrome plated shock absorber piston rod