UNS R30800 Alloy: Product Introduction
UNS R30800 is a cobalt-based superalloy known for its exceptional wear resistance, high temperature strength, and corrosion resistance. This article provides a comprehensive introduction to UNS R30800, covering its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes and sizes, production standards, welding and processing capabilities, advantages and disadvantages, and a comparison with similar alloys.
Chemical Composition
UNS R30800 has a complex chemical composition tailored for high-performance applications:
| Element | Composition (%) |
|---|---|
| Cobalt (Co) | 54.0 – 60.0 |
| Chromium (Cr) | 27.0 – 31.0 |
| Nickel (Ni) | 10.0 – 12.0 |
| Molybdenum (Mo) | 3.0 – 4.5 |
| Tungsten (W) | 3.0 – 4.5 |
| Carbon (C) | 0.05 – 0.15 |
| Iron (Fe) | 1.0 – 2.0 |
| Silicon (Si) | 1.0 max |
| Manganese (Mn) | 1.0 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.04 max |
Mechanical Properties
UNS R30800 exhibits excellent mechanical properties suitable for demanding applications:
| Property | Value |
|---|---|
| Tensile Strength, ksi (MPa) | 175 (1205) min |
| Yield Strength (0.2% offset), ksi (MPa) | 135 (930) min |
| Elongation (% in 2 inches) | 15 min |
| Hardness, Rockwell C (HRC) | 38 – 46 |
Performance Characteristics
UNS R30800 offers exceptional performance across various conditions:
- Wear Resistance: Superior resistance to abrasion, erosion, and galling, making it ideal for components subjected to high-stress wear conditions.
- High Temperature Strength: Maintains strength and hardness at elevated temperatures, up to approximately 1100°F (593°C).
- Corrosion Resistance: Good resistance to oxidation and corrosion in aggressive environments, including acids and alkalis.
Industry Applications
UNS R30800 is utilized in industries requiring high wear and corrosion resistance:
| Industry Sector | Applications |
|---|---|
| Automotive | Valve components, piston rings, and turbocharger bearings. |
| Aerospace | Bearings, seals, and turbine components in aircraft engines. |
| Oil and Gas | Drill bits, pump components, and valve seats in drilling equipment. |
Shapes and Sizes
UNS R30800 is available in various forms and sizes to meet different application needs:
- Forms: Sheets, plates, bars, tubes, and custom shapes.
- Sizes: Thickness ranging from 0.025 inches to 1.000 inches (0.64mm to 25.4mm), diameter ranging from 0.25 inches to 6.0 inches (6.35mm to 152.4mm).
Production Standards
UNS R30800 conforms to industry standards ensuring quality and performance:
| Product Form | Shapes Available | Sizes Available | Production Standards |
|---|---|---|---|
| Bars/Rods | Round bars, square bars | Diameter: 0.25″ – 6.0″ (6.35mm – 152.4mm) | ASTM A732, AMS 5759 |
| Plates/Sheets | Plates, Sheets | Thickness: 0.025″ – 1.000″ (0.64mm – 25.4mm) | ASTM A732, AMS 5537 |
| Wires | Wires | Diameter: 0.010″ – 0.250″ (0.25mm – 6.35mm) | ASTM A580, AMS 5832 |
| Tubes/Pipes | Tubes, Pipes | OD: 0.250″ – 6.000″ (6.35mm – 152.4mm) | ASTM A732, AMS 5759 |
Welding and Processing
UNS R30800 offers good weldability and machinability:
- Welding: Can be welded using standard methods such as TIG and MIG welding with appropriate preheating and post-weld heat treatment.
- Processing: Machinable using carbide tools, although care is needed due to its high hardness and toughness.
Advantages and Disadvantages
| Aspect | Details |
|---|---|
| Advantages | Exceptional wear resistance, high strength and hardness, good corrosion resistance, and reliability in harsh environments. |
| Disadvantages | Higher cost compared to conventional materials, requires expertise in handling due to its high strength and hardness. |
Similar Alloys
| Alloy Name | Comparison |
|---|---|
| UNS R30006 | Higher cobalt content, offering superior wear resistance and hardness compared to UNS R30800. |
Comparison of Similar Alloys
| Property/Feature | UNS R30800 | UNS R30006 |
|---|---|---|
| Cobalt Content (%) | 54.0 – 60.0 | 60.0 |
| Chromium Content (%) | 27.0 – 31.0 | 28.0 |
| Nickel Content (%) | 10.0 – 12.0 | 4.0 |
| Molybdenum Content (%) | 3.0 – 4.5 | 1.0 |
| Hardness, Rockwell C (HRC) | 38 – 46 | 38 – 45 |
| Applications | Automotive, Aerospace, Oil & Gas | Industrial tools, wear components |
This detailed article provides a comprehensive introduction to UNS R30800, highlighting its chemical composition, mechanical properties, performance characteristics, industry applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar alloys. Engineers and professionals seeking durable materials for applications demanding wear resistance, high strength, and reliability will find this information valuable for selecting the appropriate alloy to meet their specific needs.