# Alloy 230 UNS R06230: Properties and Applications
## Introduction to Alloy 230 UNS R06230
Alloy 230, also known as UNS R06230, is a nickel-chromium-tungsten-molybdenum alloy that offers excellent high-temperature strength and oxidation resistance. This superalloy is widely used in industries where extreme conditions are prevalent, such as aerospace, power generation, and chemical processing.
## Chemical Composition
The chemical composition of Alloy 230 plays a crucial role in its performance characteristics. The primary elements include:
– Nickel (Ni): 47-55%
– Chromium (Cr): 20-24%
– Tungsten (W): 13-15%
– Molybdenum (Mo): 1-3%
– Iron (Fe): ≤3%
– Carbon (C): 0.05-0.15%
– Lanthanum (La): 0.005-0.05%
## Mechanical Properties
Alloy 230 exhibits impressive mechanical properties across a wide temperature range:
– Tensile Strength: 120-150 ksi (827-1034 MPa)
– Yield Strength: 60-90 ksi (414-621 MPa)
– Elongation: 30-50%
– Hardness: 180-220 HB
## Physical Properties
The physical characteristics of Alloy 230 include:
– Density: 8.97 g/cm³
– Melting Range: 1300-1370°C (2370-2500°F)
– Thermal Conductivity: 11.2 W/m·K at 100°C
– Electrical Resistivity: 1.25 μΩ·m at 20°C
## Key Features and Advantages
Alloy 230 offers several notable benefits:
– Exceptional high-temperature strength and stability
Keyword: Alloy230 UNS R06230
– Outstanding oxidation resistance up to 1200°C (2200°F)
– Good resistance to carburization and nitriding environments
– Excellent thermal fatigue resistance
– Superior creep-rupture strength
– Good fabricability and weldability
## Applications of Alloy 230
Due to its unique combination of properties, Alloy 230 finds applications in various demanding industries:
### Aerospace Industry
– Combustion chamber components
– Afterburner parts
– Turbine seals and rings
### Power Generation
– Gas turbine components
– Heat exchangers
– Combustion liners
– Transition ducts
### Chemical Processing
– High-temperature furnace components
– Catalytic reforming equipment
– Pyrolysis systems
– Heat treating fixtures
### Other Applications
– Nuclear reactors
– Heat treating equipment
– Petrochemical processing
– Waste incineration systems
## Fabrication and Welding
Alloy 230 can be readily fabricated using standard techniques:
– Hot working should be performed between 1050-1200°C (1920-2190°F)
– Cold working requires intermediate annealing
– Welding can be performed using GTAW, GMAW, and SMAW methods
– Post-weld heat treatment is recommended for optimal properties
## Conclusion
Alloy 230 UNS R06230 is a versatile nickel-based superalloy that combines excellent high-temperature strength with outstanding oxidation resistance. Its unique properties make it an ideal choice for applications in extreme environments across multiple industries. The alloy’s balance of mechanical properties, fabricability, and corrosion resistance ensures reliable performance in the most demanding conditions.