17-4 PH (UNS S17400 / W.Nr. 1.4542)
17-4 PH (UNS S17400 / W.Nr. 1.4542) stainless steel is the most widely used of all of the precipitation-hardening stainless steels. Its valuable combination of properties gives designers opportunities to add reliability to their products while simplifying fabrication and often reducing costs. Type 17-4 PH is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, and good mechanical properties at temperatures up to 600°F (316°C). Its unique combination of properties make this alloy an effective solution to many design and production problems.
Equivalent Grades
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
17-4 PH | 05Cr17Ni4Cu4Nb | – | 630 | S17400 | X5CrNiCuNb16.4 | 1.4542 | – | – | – | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Nb+Ta | Cu | Fe |
17-4 PH | ≤0.07 | ≤1.0 | ≤1.0 | ≤0.04 | ≤0.03 | 15.0-17.5 | 3.0-5.0 | 0.15-0.45 | 3.0-5.0 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
7.8 | 1350-1450 | 900-1100 | ≥1000 | ≥15 | / |
Available Products and Specifications
Rod, Bar, Wire and Forgings | ASTM A564, 705, SAE AMS 5669 |
Plate, Sheet and Strip | ASTM A693, SAE AMS 5862 |
Pipe and Tube | – |
Welding Product | – |
Others | – |
Features
- Excellent resistance to corrosion
- Provide toughness in both base metals and welds.
- Well suited to applications that require ease of fabrication and then the addition of strength/hardness for improved reliability
Applications
- Aerospace – structural and parts
- Biomedical – hand tools
- Chemical Processing
- Food Process Equipment
- Gate Valves
- Mechanical Components
- Nuclear Waste Processing and Storage
- Oil and Gas Production – foils, helicopter deck platforms, etc.
- Pulp and Paper – paper mill equipment