dgallup
Automotive
- May 9, 2003
- 4,715
I'm looking to replace 302 stainless springs with something with lower permeability. I think the 302 relative permeability is between 3 and 12 in the springs I have. I was planning on using 316 as I know it's permeability is less than 1.05 at 50% cold work even though the tensile strength of 316 is a bit low. (I've got tight space restrictions). Then someone referred me to:
which says 316 is "Magnetic in spring temper". The same link says 17-7 PH is "Slightly magnetic in spring temper". Everything I see on 17-7 PH says it is very magnetic, relative permeability ~40 @ 200 Oe in anything other than condition A. I can't find anything that says how much cold work is in 316 "spring temper" and what the relative permeability is. I would love 17-7 PH for it's high strength but will it be magnetic in a spring?
What is the best low permeability spring material with reasonable availability and price? I don't think I can afford elgiloy.
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
which says 316 is "Magnetic in spring temper". The same link says 17-7 PH is "Slightly magnetic in spring temper". Everything I see on 17-7 PH says it is very magnetic, relative permeability ~40 @ 200 Oe in anything other than condition A. I can't find anything that says how much cold work is in 316 "spring temper" and what the relative permeability is. I would love 17-7 PH for it's high strength but will it be magnetic in a spring?
What is the best low permeability spring material with reasonable availability and price? I don't think I can afford elgiloy.
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.