Application Segments


Melting Route


Product Description

Corrosion and heat resistant nickel alloy – precipitation hardenable – in the form of bars, forging and forging stock. High resistance to creep and stress-rupture up to 1300°F (704°C) and oxidation resistance up to 1800°F (982°C).
High duty parts and components for gas turbines, aerospace engines, high-speed airframe parts such as disks, buckets, spacers and high temperature bolts and fasteners.

Compared to standard alloy 718 AMS limits, Cb in L718HCb is adjusted in the upper range of the standard limits in order to enhance mechanical properties.
L718HCb is typically used for high temperature bolting and fasteners.

Property Features

High temperature, precipitation hardening, nickel-base alloy with particularly high hot strength and hot yield strength up to 750°C, and excellent creep behaviour up to 700°C. The markedly higher hot strength compared with normal hot work steels is particularly noticeable when used for hot work tools with high mechanical and thermal stresses. Only air cooling of the tools is permissible.

Chemical Composition

max. 0.08 max. 0.35 max. 0.35 max. 0.015 max. 0.015 17 to 21 2.8 to 3.3 50 to 55 max. 0.3 max. 1 0.65 to 1.15 0.2 to 0.8 4.75 to 5.5 max. 0.006 max. Rem max. 5ppm max. 0.3ppm max. 3ppm

Chemical composition (average %)

Available product shapes

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

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