# Stellite1 UNS R30001 Alloy Properties and Applications
## Introduction to Stellite1 UNS R30001
Stellite1, also known by its UNS designation R30001, is a cobalt-based superalloy renowned for its exceptional wear resistance, high-temperature strength, and corrosion resistance. This alloy belongs to the Stellite family of materials developed by Deloro Stellite (now part of Kennametal) and has found widespread use in demanding industrial applications.
## Chemical Composition
The chemical composition of Stellite1 UNS R30001 plays a crucial role in its performance characteristics:
Cobalt (Co): 48-58%
Chromium (Cr): 26-32%
Tungsten (W): 3-6%
Carbon (C): 1.0-1.7%
Iron (Fe): ≤3.0%
Nickel (Ni): ≤3.0%
Silicon (Si): ≤2.0%
Manganese (Mn): ≤1.0%
Keyword: Stellite1 UNS R30001
## Physical Properties
Mechanical Properties
Hardness: 38-45 HRC (as cast)
Tensile Strength: 700-900 MPa
Yield Strength: 450-600 MPa
Elongation: 1-3%
Thermal Properties
Melting Range: 1290-1425°C (2350-2600°F)
Thermal Conductivity: 14.6 W/m·K
Thermal Expansion Coefficient: 12.5 μm/m·°C (20-100°C)
## Key Characteristics
Wear Resistance
Stellite1 exhibits outstanding resistance to various forms of wear, including abrasive, adhesive, and erosive wear, making it ideal for components subject to severe frictional forces.
Corrosion Resistance
The alloy demonstrates excellent resistance to oxidation and many corrosive environments, particularly at elevated temperatures.
High-Temperature Performance
Stellite1 maintains its mechanical properties at temperatures up to 800°C (1470°F), outperforming many steel alloys in high-temperature applications.
## Applications of Stellite1 UNS R30001
Industrial Applications
• Valve seats and trim in oil and gas applications
• Pump components for corrosive fluid handling
• Bearing surfaces in high-wear environments
• Cutting tools and dies
Aerospace Applications
• Turbine blade shrouds
• Exhaust components
• High-temperature fasteners
Medical Applications
• Surgical instruments
• Dental tools
• Prosthetic components
## Fabrication and Processing
Stellite1 can be processed through various methods, including casting, powder metallurgy, and welding. The alloy is often applied as a hardfacing material using techniques like plasma transfer arc welding or laser cladding to enhance the surface properties of less expensive base materials.
Machining Considerations
Due to its hardness and work-hardening characteristics, Stellite1 requires special machining techniques:
• Use of carbide or ceramic cutting tools
• Low cutting speeds with high feed rates
• Rigid machine setups to minimize vibration