Product Description

Martensitic precipitation hardenable chromium-nickel-copper steel possessing high strength and toughness. Further strength increments can be obtained by cold forming, followed by a precipitation hardening treatment.

Melting Route


Property Features

Aircraft and rocket engineering, mechanical engineering, power generation, measuring and control technique

Technical Specifications

Material Numbers

1.4542 1.4548 S17400 X5CrNiCuNb16-4 X5CrNiCuNb17-4-4 EZ6CNU17.04 AISI: 630 17-4 PH


A564 5643 5604 5622

Chemical Composition

0.04 0.25 0.40 15.30 4.50 3.25 0.30

Chemical composition (average %)

Available product shapes

  • Long Products
  • Open Die Forgings
  • Plates
  • Semi-Finished Products / Billet

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