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UNS R30188 Material Specification and Properties
Introduction to UNS R30188
UNS R30188 is a high-performance cobalt-based alloy known for its exceptional resistance to wear, corrosion, and high-temperature oxidation. This material is widely used in demanding applications such as aerospace, medical implants, and industrial equipment. Its unique composition and mechanical properties make it a preferred choice for components exposed to extreme environments.
Chemical Composition
The chemical composition of UNS R30188 plays a crucial role in its performance. Below is a detailed breakdown of its elemental composition:
- Cobalt (Co): 58-65%
- Chromium (Cr): 26-30%
- Tungsten (W): 5-7%
- Nickel (Ni): 1-3%
- Iron (Fe): 1% max
- Carbon (C): 0.05-0.15%
- Silicon (Si): 1% max
- Manganese (Mn): 1% max
Mechanical Properties
UNS R30188 exhibits outstanding mechanical properties, making it suitable for high-stress applications. Key mechanical properties include:
- Tensile Strength: 1200-1400 MPa
- Yield Strength: 800-1000 MPa
- Elongation: 10-20%
- Hardness: 35-45 HRC
- Modulus of Elasticity: 210-230 GPa
Physical Properties
The physical properties of UNS R30188 contribute to its performance in various environments:
- Density: 8.3-8.5 g/cm³
- Melting Point: 1350-1400°C
- Thermal Conductivity: 14-16 W/m·K
- Electrical Resistivity: 90-100 μΩ·cm
- Thermal Expansion Coefficient: 12-14 μm/m·K
Applications of UNS R30188
Due to its exceptional properties, UNS R30188 is used in a variety of industries:
- Aerospace: Turbine blades, exhaust nozzles, and other high-temperature components.
- Medical: Orthopedic implants and surgical instruments due to its biocompatibility.
- Industrial: Wear-resistant parts, valves, and pumps in corrosive environments.
- Energy: Components in nuclear reactors and power generation systems.
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Heat Treatment and Fabrication
UNS R30188 can be heat-treated to enhance its mechanical properties. Common heat treatment processes