MAR-M246 Nickel Alloy
General Technical Characteristics
MAR-M246 is a heat-resistant cast nickel-based superalloy designed for manufacturing components that operate at high temperatures and under significant mechanical loads. It is widely used in aircraft engine manufacturing and gas turbine equipment due to its high strength, creep resistance, and ability to retain its performance characteristics during prolonged exposure to elevated temperatures.
The alloy is enriched with chromium, cobalt, tungsten, molybdenum, aluminium, titanium, and tantalum. This combination of alloying elements promotes the formation of the strengthening γ′ phase, which improves high-temperature strength and resistance to prolonged loading.
Typical chemical composition of MAR-M246, wt.%:
- Nickel (Ni) — balance;
- Chromium (Cr) — approximately 9.0%;
- Cobalt (Co) — approximately 10.0%;
- Tungsten (W) — approximately 10.0%;
- Molybdenum (Mo) — approximately 2.5%;
- Aluminium (Al) — approximately 5.5%;
- Titanium (Ti) — approximately 1.5%;
- Tantalum (Ta) — approximately 1.5%;
- Carbon (C) — approximately 0.15%;
- Boron (B) — approximately 0.015%;
- Zirconium (Zr) — approximately 0.05%.
The mechanical properties of MAR-M246 depend on the casting process, heat treatment, and material condition. The alloy is characterized by high strength at elevated temperatures, creep resistance, and resistance to long-term deformation. Exact values for strength, ductility, and long-term performance should be confirmed using the technical documentation for the specific material batch.
Applications
MAR-M246 nickel alloy is primarily used to manufacture turbine blades, rotors, and other cast components for gas turbine installations. It is in demand in the aerospace industry, power engineering, and the production of equipment operating at elevated temperatures.
The material is suitable for critical components exposed to thermal and centrifugal loads over extended periods. Its use helps provide the required heat resistance and component reliability when manufacturing processes and heat treatment requirements are properly controlled.
Features of MAR-M246 Alloy
The main advantages of MAR-M246 include high-temperature strength, creep resistance, and resistance to prolonged mechanical loading. Chromium contributes to oxidation resistance, while aluminium and titanium help form the strengthening γ′ phase.
This alloy belongs to the family of cast nickel-based superalloys and is commonly used to manufacture components with complex geometries. Material selection should take into account operating temperature, loading conditions, microstructure requirements, and service environment. Actual properties depend on the alloy grade, manufacturing process, and heat treatment parameters.
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