Technical Data Sheet
17-4 PH is a martensitic, precipitation-hardening stainless steel that provides an outstanding combination of high strength and hardness along with excellent corrosion resistance. 17-4 PH has good fabricating characteristics and can be age hardened by a single step, low temperature treatment. 17-4 PH is a versatile material widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.
| Chemical Composition Limits | ||||||||||
| Weight% | Cr | Ni | Mo | Cu | N | Mn | Si | S | C | P |
| 254SMO | 20 | 18 | 6-6.5 | 0.5-1.0 | 0.18-0.22 | 1 max | 1 max | 0.010 max | 0.20 max | 0.30 max |
Alloy 254SMO (UNS S31250) is an austenitic stainless steel, similar to alloy 904L, but with increased molybdenum and nitrogen contents, to be used in seawater, oil and gas piping systems on offshore production platforms and other aggressive chloride bearing media. With an excellent resistance to pitting, crevice corrosion and to stress-corrosion cracking.
