Overaging of 17-4PH 1

• May 14, 2003

• #2

Metalguy

Materials

Jan 2, 2003

1,412

They don't degrade a whole lot-only slightly. Remember, with tempering or precip. hardening, the temp. has a big effect (log.) but the time is merely linear.

I don't have actual data, but if you lose more than a few points Rc I'd be surprised.

 

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• May 14, 2003

1
• #3

stanweld

Materials

May 9, 2003

2,906

17-4 PH with 925 F for 4 hr preciptation hardening treatment will provide a minimum tensile strength of 170ksi-ref Vol. 2 8th Edition of Metals Handbook.

 

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• May 14, 2003

• #4

stanweld

Materials

May 9, 2003

2,906

Whoops! Misunderstood. 8hrs total time at 925F. Shouldn't be much less than 170ksia- expect approximately 165ksi min.

 

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• May 16, 2003

• Thread starter
• #5

HardMetal

Materials

Oct 24, 2001

31

Thanks for your help. I spoke with someone from AK Steel and he said essentially the same thing, that the properties would not be significantly affected.

 

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