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17-4 Stainless Steel

Shapes Available

  • Flat Bar
  • Hex Bar
  • Plate
  • Round Bar
  • Sheet
  • Square Bar


  • Aerospace
  • Manufacturing
  • Nuclear
  • Wind Power

Industry Names

  • 17-4PH
  • 17-4 Stainless
  • 630


  • Stainless Steel


  • ASME SA693
  • ASME TYPE 630
  • ASTM TYPE 630
  • UNS 517400


  • Fasteners
  • Gears
  • Pump Shafts


  • Corrosion Resistant
  • High Tensile and Hardness up to 600° F

17-4 Stainless Steel is a highly versatile and widely used precipitation-hardening alloy used in a number of aerospace, nuclear energy and chemical processing applications. One of the original “PH” (precipitation hardening) grades, 17-4 delivers a combination of oxidation and corrosion resistance along with a high strength, toughness and capability of achieving numerous quality mechanical properties through heat treating at various temperature ranges. 17-4 can be machined in the annealed condition and in the heat treated state. Maximum toughness is achieved by aging at 1150°F, while maximum strength is attained through aging at 900°F.

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Metal Properties
Electrical Resistivity 463 Ohms (circ mil./ft.)
Melting Range 2560-2625 °F
Poisson's Ratio 0.272
Density 0.282 lb/inch³
Chemical Composition
C- .07
Cb+Ta5xC .45
Cr15.0 17.5
Cu3.0 4.0
Fe- Bal
Mn- 1.0
Mo- .05
Ni3.0 5.0
P- .07
S- .03
Si- 1.0

DISCLAIMER: The information provided on this Web site, technical or otherwise, is merely for informational purposes, and is not intended to serve as a guide, manual, instructions, or any kind reference for proper safety procedures or material purchasing. Michlin Metals makes no warranty, express or implied, based on the statements on this Web site and, as such, will not be liable for any damages, either direct or indirect, including but not limited to consequential damages, such as damages for loss of profits, that may arise based on reliance on the information provided on this Web site. Some information has been referenced from reliable industry sources. Tradenames listed are the sole property of the tradename owners. Michlin Metals typically provides branded products through its relationships with mills and authorized re-sellers. Equivalent non-branded product is sometimes also available through certified sources of such products. Michlin Metals will never substitute non-branded product when branded product is requested.

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