About low-temperature annealing of SUS materials

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keyword: SUS304; springmaterials; SUS; SUS631; lowtemperatureannealing; SUS304CSP-3/4H SUS631CSP-3/4H

Question Zawa 2013/12/16(Mon) 13:40

We designed springs of the same shape that was annealed at low temperature with SUS304 CSP-3/4H and SUS631 CSP-3/4H. I checked the load with the same displacement, but the result is slightly smaller for SUS631. SUS631 is a harder material and the calculation result at design time indicated that the value should be slightly larger than SUS304, but the actual result is opposite. I did some research myself, but I don’t understand the reason for the above phenomenon. Would you please let me know your opinions on this?

* SUS304（EQ to S30400 by ASTM, X5CrNi1810 by DIN, L-No6X5CrNi 18-9 by ISO ）

Answer Tokai Spring 2013/12/16(Mon) 16:24

I’m just guessing, but is there a difference within the range of each plate thickness tolerance? In addition, normally, SUS631CSP-3/4H material is not annealed at low temperature but is gone through the hardening process.

* SUS304（EQ to S30400 by ASTM, X5CrNi1810 by DIN, L-No6X5CrNi 18-9 by ISO ）

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