Chrome Alloy (52CrMoV4 1.7701) vs. 5160 vs. 6150 For Spring Material

[mgh70]

All,

I am looking for the pros and cons comparing 52CrMoV4 1.7701, 5160, and 6150 for spring application.

Currently have a requirement for 5,000 minimum cycle life, with stress levels at 136,000 lbs/in^2 at the top of its working deflection (bar dia of 2.687"). Possible saline conditions. Temperatures from 34F-151F.

Thanks in advance,

mgh

 

[slashragnarok]

Afaik 52CrMoV4 is same as 6150 which has a tad more Vanadium than 5160.

 

[mgh70]

So in terms of crack growth, fatigue, and modulus all three are pretty similar. No real difference then?

 

[slashragnarok]

Don't think so. 6150 has got more tensile strength than 5160. Others may confirm please.