# Alloy 907 UNS N19907: Properties and Applications in High-Temperature Environments
## Introduction to Alloy 907 UNS N19907
Alloy 907, also known as UNS N19907, is a nickel-iron-based superalloy designed for high-temperature applications. This alloy is known for its excellent mechanical properties, thermal stability, and resistance to oxidation and corrosion at elevated temperatures. It is widely used in industries where components are subjected to extreme thermal and mechanical stresses.
## Chemical Composition of Alloy 907
The chemical composition of Alloy 907 plays a crucial role in its performance. The primary elements include:
– Nickel (Ni): ~38-42%
– Iron (Fe): ~38-42%
– Cobalt (Co): ~13-17%
– Molybdenum (Mo): ~4.5-5.5%
– Titanium (Ti): ~1.3-1.8%
– Aluminum (Al): ~0.7-1.2%
These elements contribute to the alloy’s high strength, creep resistance, and thermal stability.
## Mechanical Properties
Alloy 907 exhibits outstanding mechanical properties, especially at high temperatures:
– Tensile Strength: ~1100 MPa at room temperature
– Yield Strength: ~800 MPa at room temperature
– Elongation: ~15-20%
– Hardness: ~30-35 HRC
These properties make it suitable for applications where materials must withstand significant stress and deformation under high temperatures.
## Thermal Properties
The thermal properties of Alloy 907 are critical for its performance in high-temperature environments:
Keyword: Alloy 907 UNS N19907
– Melting Point: ~1350-1400°C
– Thermal Expansion Coefficient: ~12-14 x 10-6/°C (20-1000°C)
– Thermal Conductivity: ~12-15 W/m·K (at 20°C)
These properties ensure that the alloy maintains its structural integrity even under rapid temperature changes.
## Applications in High-Temperature Environments
Alloy 907 is widely used in industries that require materials capable of withstanding extreme conditions:
### Aerospace Industry
In the aerospace sector, Alloy 907 is used for turbine blades, exhaust systems, and other components exposed to high temperatures and mechanical stress.
### Power Generation
The alloy is employed in gas turbines, nuclear reactors, and other power generation equipment where high-temperature resistance is essential.
### Chemical Processing
Due to its excellent corrosion resistance, Alloy 907 is used in chemical processing plants for reactors, heat exchangers, and piping systems.
## Advantages of Alloy 907
Alloy 907 offers several advantages over other high-temperature alloys:
– Excellent creep resistance at elevated temperatures
– Good oxidation and corrosion resistance
– High strength and toughness
– Good weldability and fabricability
## Conclusion
Alloy 907 UNS N19907 is a versatile and reliable material for high-temperature applications. Its unique combination of mechanical, thermal, and chemical properties makes it an ideal choice for industries that demand materials capable of performing under extreme conditions. Whether in aerospace, power generation, or chemical processing, Alloy 907 continues to prove its worth as a high-performance superalloy.
