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Subject: 17-4ph heat treat

Date: 09/20/00 at 12:46 PM
Posted by: Lee Seymour
E-mail: leeaseymour@hotmail.com
Message Posted:

We are having difficulty getting the required tensile (180ksi)even though the hardness is good.
Ex: Reqd - 180,000 160,000 6 15 Rc 40min
Act - 172,400 170,300 12 46 Rc 40
171,700 167,500 14 41 Rc 38
168,000 166,000 10 40 Rc 40
170,600 166,700 11 39 Rc 39.5

Cycle: Age @1900F in vacuum, N Quench, Age 4 hrs @ 910F


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