Stainless steel
EU
1.4542 X5CrNiCuNb16-4 - X5CrNiCu17-4 - Z6CNU17-04
US
AISI 630 - UNS S17400 - 17-4Ph
Martensitic precipitation hardening stainless steel, good weldability, excellent mechanical properties. Mainly used in the aeronautical and space sectors.
17-4PH stainless steel - 1.4542 - Available from stock
The 1.4542 alloy, more commonly referred to by the names 17-4PH, X5CrNiCuNb16-4, Z6CNU17-04 and AISI 630, is a martensitic precipitation hardening stainless steel. It is renowned for its unique combination of strength, high corrosion resistance, excellent mechanical properties and its weldability.
Technical summary of this steel:
- Europe: 1.4542 | X5CrNiCuNb16-4 | X5CrNiCu17-4 | Z6CNU17-04
- USA: AISI 630 | UNS S17400 | 17-4Ph
- Europe: EN 10088-2 | EN 10088-3 | EN 10088-4 | EN 10088-5 | EN 10250-4 | EN 3484 | EN 4882 | EN 4883 | NF S 94-090 | ISO 7153-1
- USA: AISI 630 | UNS S17400 | ASTM F899 | ASTM A564 | AMS 5643
- High mechanical strength thanks to precipitation hardening, allowing for excellent mechanical properties.
- Good corrosion resistance, making it more efficient in various environments, especially when compared with other martensitic steels.
- High weldability: unlike many high-strength steels, the 17-4PH can be welded without losing a significant amount of its properties.
- The most common heat treatment process for the 17-4PH consists of treating at around 1040°C, before quickly letting it cool down to achieve a martensitic condition.
Properties
- High mechanical strength thanks to precipitation hardening, allowing for excellent mechanical properties.
- Good corrosion resistance, making it more efficient in various environments, especially when compared with other martensitic steels.
- High weldability: unlike many high-strength steels, the 17-4PH can be welded without losing a significant amount of its properties.
Standards and Designations
Heat treatment
- The most common heat treatment process for the 17-4PH consists of treating at around 1040°C, before quickly letting it cool down to achieve a martensitic condition.
Special advantages
Conclusion
Application
- Aeronautics and space, where it is used to make structural components, engine parts, and other critical applications requiring both high strength and good corrosion resistance.
- Industrial applications: suitable for manufacturing mechanical parts, equipment for the chemical and petrochemical industries, as well as uses in the defence and energy sectors.
- The 17-4PH/1.4542/X5CrNiCuNb16-4 is particularly popular in rigorous industries thanks to its ability to combine strength, ductility and corrosion resistance with high weldability, making it ideal for a variety of structural and functional applications.
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