ASTM grade: There is no specific single ASTM grade for Incoloy 901 pipe. It is often covered under general nickel - alloy pipe standards. For example, it may be referenced in ASTM B637 (Seamless and Welded Nickel - Chromium - Iron - Molybdenum - Columbium Alloys and Nickel - Chromium - Iron - Molybdenum - Tantalum Alloys Pipe).
Mechanical properties:Tensile strength: Typically around 1100 - 1200 MPa.
Yield strength: Approximately 900 - 1000 MPa.
Elongation: About 10 - 15%.
Chemical composition:Nickel (Ni): 40.0 - 45.0%
Chromium (Cr): 12.0 - 15.0%
Iron (Fe): Bal. (around 40 - 50%)
Molybdenum (Mo): 6.0 - 8.0%
Titanium (Ti): 2.8 - 3.15%
Aluminum (Al): 0.2 - 0.5%
Carbon (C): ≤0.08%
Manganese (Mn): ≤0.35%
Silicon (Si): ≤0.35%
Phosphorus (P): ≤0.02%
Sulfur (S): ≤0.015%
Applications:Aerospace: Used in aircraft engine components like compressor disks and shafts due to its high - temperature strength and good fatigue resistance.
Industrial gas turbines: Employed in the hot - section components of gas turbines to withstand high temperatures and mechanical stresses.
Power generation: Utilized in some high - temperature applications in power plants, such as in steam turbines and related piping systems.
Advantages:High - temperature strength: Maintains excellent strength at elevated temperatures, ensuring reliable performance in high - heat environments.
Good fatigue resistance: Exhibits good resistance to fatigue failure, which is crucial for components subject to cyclic loading.
Weldability: Can be welded using conventional welding techniques, facilitating manufacturing and repair processes.
Incoloy 903
ASTM grade: Similar to Incoloy 901, there isn't a specific single ASTM grade just for Incoloy 903 pipe. It may be covered under relevant nickel - alloy or superalloy standards.
Mechanical properties:Tensile strength: At room temperature, it is around 1100 - 1250 MPa.
Yield strength: Approximately 850 - 1000 MPa.
Elongation: About 12 - 20%.
High - temperature properties: Retains good strength and ductility at elevated temperatures, with a tensile strength of around 500 - 700 MPa at 650°C.
Chemical composition:Nickel (Ni): 42.0 - 46.0%
Chromium (Cr): 12.5 - 16.0%
Iron (Fe): Bal. (around 35 - 40%)
Cobalt (Co): 1.0 - 2.0%
Molybdenum (Mo): 2.5 - 3.5%
Titanium (Ti): 2.7 - 3.2%
Aluminum (Al): 0.7 - 1.2%
Carbon (C): ≤0.05%
Manganese (Mn): ≤0.50%
Silicon (Si): ≤0.50%
Phosphorus (P): ≤0.02%
Sulfur (S): ≤0.01%
Applications:Aerospace: Used in aircraft engine hot - section components like turbine blades and vanes due to its high - temperature strength and oxidation resistance.
Power generation: Employed in high - temperature components of power plants, such as in advanced ultra - supercritical steam turbines, to withstand extreme operating conditions.
Industrial heating: Utilized in industrial furnaces and heat - treating equipment where high - temperature stability and resistance to thermal cycling are required.
Advantages:Exceptional high - temperature performance: Offers excellent strength, oxidation resistance, and stability at high temperatures, enabling reliable operation in harsh thermal environments.
Good resistance to thermal fatigue: Can withstand repeated heating and cooling cycles without significant degradation, increasing the lifespan of components.
Low coefficient of thermal expansion: Has a relatively low coefficient of thermal expansion, which helps to minimize dimensional changes and thermal stresses during temperature variations.
