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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.

Heat Treatment and Fabrication

UNS R30188 can be heat-treated to enhance its mechanical properties. Common heat treatment processes