hard chrome plated CK45 or 40Cr alloy piston rod

materail :40Cr alloy steel or CK45 surface: hard chrome plated chrome thickness : 0.02mm-0.05mm surface Ra: 0.16-0.4um

CHEMICAL COMPOSITION (%)

C	Si	Mn	Cr	Ni	P	S	CU
40Cr	0.37~0.44	0.17~0.37	0.50~0.80	0.80~1.10	≤0.030	≤0.035	≤0.035	≤0.030

 yield (σs/MPa)≥785

 elongation(δ5/%)≥9 

   (ψ/%)≥45

 

 (Aku2/J)≥47

 hardness :  179~229HBS

Surface roughness    Ra ≤0.2 Micron and Rt≤2 Micron Tolerance on diameter   ISO f7Quality   half of the tolerance f7straightness  ≤0.2mm/m

Test in natural salt spray according to ASTM B 117-36 hoursPackage:normal straw rope,also according to your request

hard chrome plated CK45 or 40Cr alloy piston rod