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Alloy 75

A nickel-chromium grade, Alloy 75 has good mechanical properties and resistance to oxidation at high temperature.

Alloy 75 is an 80/20 nickel – chromium alloy. First introduced in the 1940’s for turbine blades in Whittle Jet Engines, it is now widely used where oxidation and scaling resistance is required, coupled with medium strength at high temperatures.


Product form Size range from Size range to
Alloy 75 round bar 8 mm 160 mm
Alloy 75 sheet & plate 0.6 mm 3 mm

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    Sheet & Plate

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    Round Bar

Chemical Analysis

% Ni Cr Fe Mn C Si Ph Ti Cu
Min Balance 18 0 0 0.08 0 0 0.2 0
Max Balance 21 5 1 0.15 1 0.03 0.6 0.50


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Alloy 75 can be used in a variety of applications including:

  • Aerospace sheet metal fabrication
  • Gas turbine engine components
  • Industrial furnace components
  • Heat-treating equipments and fixtures
  • Nuclear engineering

About Alloy 75

Alloy 75 is made up of nickel and chromium. The alloy is known for its outstanding performance at high temperature where creep stress-rupture properties are not critical. Titanium is added to increase the overall strength of the alloy. Alloy 75 is primarily used in low stress, elevated temperature applications which require some oxidation resistance.

Alloy 75 is used for numerous fabricated components in both the aerospace and gas turbine industries. Alloy 75 is popular due to its ease of fabrication and the fact that it’s readily formed.


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Melting Range:
Specific Heat Capacity:
461 J/kg.°C
Electrical Resistivity:
1.09 µΩ.m


UNS Number:
Werkstoff Number:
2.4951, 2.4630
ASTM B637, RRMS 33030/1 (MSRR 7004), 7022, 7063, 7070, 7162, 7193, 7952, BS: HR 203, 3HR1, HR3, HR4, BS4HR 601
Download the Alloy 75 Data Sheet Download

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