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Spring wire material replaceable? 1

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kokerkov

kokerkov

Mechanical
Sep 20, 2023
10
Spring is a simple torsion spring, having ~1.75 colis. Does not really matter.

Original material is (ASTM A401)EN 10270-2 FDSiCr on the drawing. I want to use (A228)music wire to replace this. Is it a viable replacement? It doesn't seem to be valve spring.

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Does it meet the same property requirements?
There are only about 6 ASTM specs for various spring wire grades.
You need to compare things carefully.
And you need to know the operating conditions, stress, temperature, fatigue life, and so on.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed
 
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One primary difference is that music wire tensile strength vs. Cr-Si strength has a crossover at about 0.080 wire diameter - above that, CrSi wire is stronger, and below that size music wire is stronger. Past that, CrSi wire has better resistance to relaxation at moderately elevated temperatures (250-400 F), and is better at low cycle (10^4 to 10^5 cycles) fatigue.
 
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