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Alloy 105

Precipitation-hardenable Nickel-Cobalt-Chromium grade, Alloy 105 is ideal for high temperature service.

With the addition of Molybdenum for solid-solution strengthening, Alloy 105 offers superior strength and heat resistance. The alloy has high creep-rupture properties at temperature up to 950°C.


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Alloy 105 round bar12.7 mm203.2 mm GET A QUOTE

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Power Generation

Alloy 105 can be used in a variety of applications, here are just a few examples:

  • Turbine blades
  • Turbine discs
  • Turbine shafts
  • Forgings
  • Rolled rings
  • Bolts and fasteners

About Alloy 105

Alloy 105 has excellent heat resistant properties, high strength and excellent oxidation resistance. The high creep-rupture properties of Alloy 105 makes the alloy perfect for critical gas turbine applications.

Alloy 105 can be heat treated as followed;

For optimum long term creep and ductility at 850-950°C:
4 hours at 1150°C, 16 hours at 1050-1065 °C and 16 hours at 850°C with air cooling after all heat treatment operations.

Where tensile strength, elongation and impact stength are more critical at temperature up to 700°C:
4 hours at 1125°C and 16 hours at 850°C with air cooling after all heat treatment operations.


8 g/cm³
Melting range:
Liquidus 1345°C & Solidus 1290°C
Specific Heat Capacity:
419 J/kg.°C
Electrical Resistivity:
1.31 µΩ.m
Curie Temperature:


ASTM B637, MSRR 7004, 7022, 7063, 7070, 7162, 7193, 7952, BS: HR 203, 3HR1, HR2, HR3, HR4, BS4HR 601
Download the Alloy 105 Data Sheet Download

FAQs & Resources

Alloy 105 is a high strength precipitation–hardenable alloy. A Nickel-Chromium-Cobalt alloy with the additions of Molybdenum and Aluminium gives the alloy high strength combined with high creep-rupture properties up to 950°C. In addition, the alloy demonstrates good high temperature oxidation.

Precipitation hardening, also called age hardening or particle hardening, is a heat treatment technique used to increase the yield strength of malleable materials, including structural alloys of Aluminium, Magnesium, Nickel, Titanium, some steels and stainless steels.

Creep Properties

Creep is a time-dependent deformation of a material while under an applied load that is below its yield strength. It most often occurs at elevated temperatures, but some materials creep at room temperature. Creep terminates in rupture if steps are not taken to bring it to a halt.

Creep data for general design use are usually obtained under conditions of constant uniaxial loading and constant temperature. Results of tests are usually plotted as strain versus time up to rupture. As indicated in the image, creep often takes place in three stages.

• In the initial stage, strain occurs at a relatively rapid rate but the rate gradually decreases until it becomes approximately constant.
• During the second stage, this constant creep rate is called the minimum creep rate or steady-state creep rate since it is the slowest creep rate during the test.
• In the third stage, the strain rate increases until failure occurs.

Creep in service is usually affected by changing conditions of loading and temperature and the number of possible stress-temperature-time combinations is infinite. While most materials are subject to creep, the creep mechanisms are often different between metals, plastics, rubber and concrete.

Stress Rupture Properties

Stress rupture testing is similar to creep testing except that the stresses are higher than those used in a creep test. Stress rupture tests are used to determine the time necessary to produce failure, so stress rupture testing is always done until failure occurs.

Material used in aerospace gas turbines for the manufacture of turbine blades, discs, forgings, ring sections and shafts. In addition, the alloy is also used to manufacture bolts and fasteners.

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