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17/7 is a precipitation hardenable stainless. It develops its strength and hardness through heat treating. This makes it well suited for applications that require good formability, high strength/hardness and minimum distortion upon heat treating. 17/7 also provides benefits for other applications requiring high strength and good corrosion resistance, as well as excellent properties for flat springs at temperatures up to 315°C (600°F).

Specific Gravity

7.81 g/cm3

Typical Applications

Related Specifications

Chemical processing equipment


Oil and Petroleum refining equipment

Food processing equipment

AMS 5528


AMS 5529

Mil S 25043

UNS S17700

Chemical Composition (Wt %)

  C Mn P S Si Ch Ni Al Cr Fe
Min  – 16.00 6.50 0.75 16 Bal
Max 0.09 1.00 0.04 0.03 1.00 18.00 7.75 1.50 18

Typical Mechanical Properties after Heat treatment (AMS 5528)

  0.2% Proof Stress Tensile Strength Elongation Hardness
Min 1035 1241 4 38
Max 1448 6 46
* Every effort has been made to ensure that our technical specifications are accurate. However, technical specifications included within Dynamic Metals Ltd should be used as a guideline only and are subject to change without notice.

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