17-4 Stainless Steel

The 17-4 stainless steel grade is an age-hardening martensitic alloy that combines high corrosion resistance and strength. Unlike conventional martensitic steels, it weldable by all standard methods, and achieves hardening with simple low-temperature treatment over a short period of time. This product is a cost-effective replacement for high strength carbon steels as well as other stainless grades as it has a high strength and resistant to corrosion.

Chemical Formula
Chromium 15%, Nickel 3%, Copper 3%, Manganese 1%, Silicon 1%, Columbium + Tantalum .45%, Carbon .07%, Phosphorus .04%, Sulfur .03%, Molybdenum .05%, Iron remainder.

17-4 Stainless Steel Plate, 17-4 Stainless Steel Sheet, 17-4 SS Round Bar, 17-4 SS Flat Bar, 17-4 SS Square Bar

Common Trade names
17-4 Stainless, 17-4 Stainless Steel


  • Corrosion Resistance: 17-4 stainless stands up excellently in a range of atmospheric environments even when exposed to corrosive elements.
  • Heat Resistance: Continuous use of 17-4 above 590⁰C is not recommended.
  • Temperature above can cause corrosive cracking. 550°C is the optimum tempering temperature in chloride media.
  • Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.

The 17-4 can be applied to a range of applications including a variety of accessories and equipment such as gate valves, fasteners, food processing machinery, and aircraft structures.

Available Stock Sizes
See specific product page for unique sizes. Here at Atlantic Stainless no inquiry is too large or too small. Feel free to
contact us today for a quote on any of your custom size orders.

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