Is there common stainless 'spring' steel that is magnetic? 2

[slickdownhiller]

Is there a stainless 'spring' steel that is magnetic and machinable? I'm designing a product and need a material with these properties.

Thanks.

 

[swall]

302 stainless springs are slightly magnetic. The cold drawing of the wire causes martensitic transformation which makes a normally austenitic material magnetic. How strongly magnetic do you want the spring to be?

 

[mcguire]

Usually 301 is preferred for spring applications because of its greater tendency for transformation to martensite (the magnetic phase). This alloy is produced in free-machining versions using controlled shape oxy-sulfides, which is much preferable to resulfurized versions which have poor corrosion resistance.

Michael McGuire

http://stainlesssteelforengineers.blogspot.com/

 

[EdStainless]

spring and machinable are counter to each other. For decent spring properties you need high strength, that means that it is hard, and therefore difficult to machine.

But the real question is how magnetic do you need it?
and how strong do you need it?
You might be better off with a PH stainless (17-7PH in the CH900 condition)

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P.E. Metallurgy, Plymouth Tube

 

[dgallup]

17-7 PH makes great springs and is also quite magnetic. It has a permeability of around 200 compared to ~10 or less for the 300 series spring materials.

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