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Alloy 17-4

A precipitation hardenable chromium-nickel-copper grade, Alloy 17-4 offers excellent corrosion resistance, high creep rupture strength and high tensile strength.

Most commonly used in the oil and gas, aerospace and motorsport markets, Alloy 17-4 offers excellent corrosion resistance, high creep rupture strength, high tensile strength and hardness.


Product formSize range fromSize range to
Alloy 17-4 round bar6.35 mm304.8 mm GET A QUOTE
Alloy 17-4 sheet & plate3.048 mm76.2 mm GET A QUOTE

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Sheet & Plate

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Round Bar

Chemical Analysis

Min315--3--5 x c---


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Ideal for the motorsport industry

Alloy 17-4 can be used in a variety of applications, here are just a few examples:

  • Gate valves
  • Pump shafts, gears and plungers
  • Valve stems, balls, bushings and seats
  • Fasteners

About Alloy 17-4

Alloy 17-4 is an age-hardening martensitic stainless combining high strength with the corrosion resistance of stainless steel.

The alloy maintains high tensile strength and hardness up to 316°C and excellent oxidation resistance up to 593°C. Alloy 17-4 has good creep-stress rupture properties up to 482°C.

Hardening is achieved by a short-time, simple low-temperature treatments. Unlike conventional martensitic stainless steels, such as type 410, Alloy 17-4 is more weldable.

The strength, corrosion resistance and simplified fabrication can make Alloy 17-4 stainless a cost-effective replacement for high strength carbon steels as well as other stainless grades.

For more information on 17-4 Stainless, or to enquire about our inventory then please contact us, alternatively fill in our online quote form and we’ll get right back to you.



7.81 g/cm³
Poisson's ratio:
Melting range:
1404.4 – 1440.6 °C
Electrical resistivity:
7.7 x 10^-7 Ωm


UNS Number:
1.4542, 1.4548
ASTM A693, A564, A705, AMS 5604, 5622, 5643, 5825
Download the Alloy 17-4 Data Sheet Download

FAQs & Resources

High strength alloys usually refer high-strength low-alloy (HSLA) steels or micro-alloyed steels. These alloys are engineered to have better mechanical and corrosion resistant than carbon steels for specific conditions. These are not to be confused by the precipitation hardened or aged hardened grades which are classed as high-strength stainless steel or nickel-based alloys. More information on HSLA can be found on the ASM international website.

This can vary according to the products and specification of your order. Please let us know when you need the goods and we will aim to deliver according to your requirements.

You can fill in ‘Request a Quote’ form online on most of the pages on our website or click ‘contact us’. Alternatively, you can also call us, fax your enquiry to us or send an email to enquiries@neonickel.com

Request a Quote

Fill in our online form to get a fast quote. Got a technical question? Contact us on techsales@neonickel.com or for more general enquiries please email us at enquiries@neonickel.com