Application Segments


Melting Route


Product Description

This specification covers a premium aircraft-quality, double vacuum-melted low-alloy steel in the form of bars, forgings and forging stock.

It is used typically for parts such as bearings operating under heavy loads and high speeds at moderate temperatures up to 600° F. E.g. bearings and rolling elements, bearing balls and races.

Technical Specifications

Material Numbers

M50 1.3551 80MoCrV42-16



Chemical Composition

Chemical composition (average %)
0.80 to 0.85 max. 0.25 0.15 to 0.35 max. 0.015 max. 0.008 4.00 to 4.25 4.00 to 4.50 max. 0.15 0.90 to 1.10 max. 0.25 max. 0.10 max. 0.25

Available product shapes

  • Long Products
  • Semi-Finished Products / Billet

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