17 4 Ph Stainless Steel Heat Treatment

Alloy 17 4ph is a precipitation hardening martensitic stainless steel with cu and nb cb additions.

17 4 ph stainless steel heat treatment.

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. Its mechanical properties can be optimized with heat treatment where very high yield strength up to 180 ksi can be achieved.

The grade combines high strength hardness up to 572 f 300 c and corrosion resistance. 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. Alloy 17 4 can be heat treated to a variety of temperatures to develop a wide range of properties. The following chart outlines the times and temperatures required.

Mechanical properties can be optimized with heat treatment. High strength 17 4 ph stainless steel with a higher chromium content than 15 5 ph stainless steel this high strength 17 4 ph offers better corrosion resistance. 17 4 ph provides this high strength in combination with good mechanical properties at temperatures of up to 600 f 316 c. 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.

Fine cu precipitates are observed. Back scattered electron analysis of martensitic ph 17 4 stainless steel sem. Heat at 1900ºf 1040ºc for 30 minutes and cool to below 90ºf 32ºc to allow complete. Alloy 17 4 should not be used at temperatures above 572 f or at very low temperatures.

Eight standard heat treatments have been developed.