17-4 ph stainless steel

General Properties of 17-4 ph stainless steel

The grade should not be used at temperatures above 572°F (300°C) or at very low temperatures. It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is equivalent to Alloy 304 or 430.

 17-4 ph stainless steel Applications

1. Offshore (foils, helicopter deck platforms, etc.)
2. Food industry
3. Pulp and paper industry
4. Aerospace (turbine blades, etc.)
5. Mechanical components
6. Nuclear waste casks

17-4 ph stainless steel standards 

1. ASTM A693 grade 630 (AMS 5604B) UNS S17400
2. EURONORM 1.4542 X5CrNiCuNb 16-4
3. AFNOR Z5 CNU 17-4PH
4. DIN 1.4542

17-4 ph stainless steel Corrosion Resistance

Alloy 17-4 PH withstands corrosive attacks better than any of the standard hardenable stainless steels and is comparable to Alloy 304 in most media.


If there are potential risks of stress corrosion cracking, the higher aging temperatures then must be selected over 1022°F (550°C), preferably 1094°F (590°C). 1022°F (550°C) is the optimum tempering temperature in chloride media.



1094°F (590°C) is the optimum tempering temperature in H2S media.




 The alloy is subject to crevice or pitting attack if exposed to stagnant seawater for any length of time.


 It is corrosion resistant in some chemical, petroleum, paper, dairy and food processing industries (equivalent to 304L grade).



If you would like to know more about 17-4PH stainless steel then click 17-4PH Technical Data.