hard chrome plated thickness:0.02mm-0.04mm Ra<0.2 micron and Rt<2 micron Surface Hardness:850-1150HV salt spray :117~96 hour

1	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

Manufacture precedure:

Raw material--cutting--straightening--grinding 3 times--straightening--polishing--chorme plating---polishing--products

Straightness:<0.2mm/m

Tolerance on diameter: ISO f7Quality: half of the tolerance f7Test in natural salt spray according to ASTM B 117-36 hours

We can manufacture according to your drawing.

Package:seperate packed in paper sleeve seperately,also can add box as below:

only in paper sleeve

then bundle

hard chrome plated steel CK45 or alloy piston rod