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Dimensional Insatbility SS Vs. 1085

thread693-97296

Dimensional Insatbility SS Vs. 1085

Dimensional Insatbility SS Vs. 1085

(OP)
It is commonly known in the spring industry that when 302SS springs are stress releived after coiling, they increase in diameter (d) and decrease in free length (Lf); conversely, music wire decreases in diameter and increases in free length.
My question is why? I suspect that it has something to do with the packing arrangement (BCC vs. FCC) of the metals but I would only be guessing. Does anybody really know the physics?

Jackpot

RE: Dimensional Insatbility SS Vs. 1085

yes I used to know why this is, but forgot, I will think about it tonite. let me re-hash your question:

302ss (spring temper) gets diameter and looses length when stress relived after forming, 1085 spring temper does exactly the opposite.

hmmmm Have to think this one over.

nick

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