Grade 143D

Stainless Steel

Grade 143D

Grade 143D is a precipitation hardened martensitic stainless steel used predominantly in the aerospace industry. It offers excellent strength and hardness combined with a good general corrosion resistance (similar to that of the 300 series stainless).

It also offers excellent anti-galling properties and a good resistance to some mildly acidic conditions. However, 143D is subject to pitting corrosion in marine environments and crevice corrosion on prolonged immersion.

Related Specifications of Grade 143D

  • BS 2S 143D
  • FV520B
  • 1.4594
  • X5CrNiMoCuNb14-5

Nominal Composition of Grade 143D

Fe rem, Cr 14.0%, Ni 5.4%, Mn 1.0% max, Si 0.6% max, Cu 1.6%, Mo 1.6%, C 0.07% max

Mechanical Properties of Grade 143D

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
1080 930 15

Key Features of Grade 143D

  • Excellent strength and hardness levels
  • Good general corrosion resistance

Applications of Grade 143D

Aerospace | Gas turbine blades, undercarriage components and fasteners

Columbia Metals – a leading supplier of Grade 143D

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of Grade 143D and other high quality specialist engineering alloys.

To buy or learn more about Grade 143D contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

Click here to download a Grade 143D data sheet.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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