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Temp profile for ASTM HR50

Temp profile for ASTM HR50

Temp profile for ASTM HR50

(OP)
Does anybody know the time and temp profile for stress relieving brass under ASTM HR50?

RE: Temp profile for ASTM HR50

What is the brass alloy that needs to be stress-relieved?  Product form (sheet, forging, tube, etc.)?  Also, why are you using the HR scale?  This is usually used for soft, thin bearing material.

RE: Temp profile for ASTM HR50

(OP)
I'm using C26000 tubing, 1" x .065 and 1.625" x .065

I'm not sure that the HR scale is right. Basically, I just need to relieve the stresses from the as-drawn tubing due to stress corrosion cracking.

I've been hearing various temp/time profiles but was hoping to find a spec of some sort to which I could refer. I'm also trying to validate the numbers I'm hearing (which range from 500F for 1 hr to 600F for 10 min with no mention of cooling rates in either case).

Any help would be greatly appreciated.

RE: Temp profile for ASTM HR50

ASM HANDBOOK Volume 4 Heat Treating lists 320 C for 20 minutes as a typical stress relief cycle.  There is no requirement for cooling rate.  Castings are generally quenched or cooled using forced-air, but wrought alloys are not.

RE: Temp profile for ASTM HR50

(OP)
Thank you very much.

That's just what I was looking for!

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