17 4 Ph Stainless Steel Heat Treatment

Stainless steel al 17 4 alloy summary of heat treating al 17 4 alloy minimum properties specified in aerospace material specification ams 5604 heat treat to produce martensitic structure precipitation heat treatment to produce desired strength solution heat treatment at 1950 f 1066 c precipitation hardening heat treatment 900 f.

17 4 ph stainless steel heat treatment.

Alloy 17 4 should not be used at temperatures above 572 f or at very low temperatures. Fine cu precipitates are observed. Very high yield strength up to 1100 1300 mpa 160 190 ksi can be achieved. It is also known as 630 stainless steel.

Secondary electron analysis of martensitic ph 17 4 stainless steel sem. Mechanical properties can be optimized with heat treatment. The grade combines high strength hardness up to 572 f 300 c and corrosion resistance. 17 4 ph stainless steel 2 as supplied from the mill in condition a 17 4 ph stainless steel can be heat treated at a variety of temperatures to develop a wide range of properties.

17 4 ph steel contains 4 copper and may be hardened by a single low temperature precipitation hardening heat treatment producing excellent mechanical properties at a high strength level. The following chart outlines the times and temperatures required. Its mechanical properties can be optimized with heat treatment where very high yield strength up to 180 ksi can be achieved. Eight standard heat treatments have been developed.

Alloy 17 4 can be heat treated to a variety of temperatures to develop a wide range of properties. Type 17 4 ph alloy is hardened by heating solution treated material condition a to between 900 ºf 480ºc and 1150ºf 620ºc for one to four hours depending upon the temperature then air cooling. Tem bright field image of the d ferrite phase in 17 4 ph stainless steel after solution treatment. Alloy 17 4ph is a precipitation hardening martensitic stainless steel with cu and nb cb additions.

Heat at 1900ºf 1040ºc for 30 minutes and cool to below 90ºf 32ºc to allow complete.