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Stellite8 Cobalt Alloy Tube – High Performance Cobalt Alloy Steel in China
Stellite8 Cobalt Alloy Tube is a high-performance chromium cobalt nickel alloy designed for exceptional durability, corrosion resistance, and thermal stability. Produced by our trusted China manufacturer, this cobalt alloy steel excels in demanding industrial applications, offering unmatched reliability due to its optimized cobalt alloy composition.
Price: Contact Us for a Custom Quote
Inquire about competitive pricing for Stellite8 Cobalt Alloy Tube through our website or customer service portal. Pricing is customized based on specifications, order volume, and delivery terms. Connect with our China-based manufacturing team for a tailored quote.
Specifications
- Outer Diameter: 8 mm to 200 mm
- Wall Thickness: 0.8 mm to 15 mm
- Length: Up to 6 meters (customizable)
- Surface Treatment: Polished, pickled, or annealed
- Standards: ASTM, ASME, or client-specific
- Finish: Seamless or welded configurations
Key Features (Advantages)
- Superior Corrosion Resistance: Resists harsh chemical environments effectively.
- High Wear Resistance: Ideal for abrasive conditions, extending service life.
- Thermal Stability: Performs reliably up to 1100°C.
- Customizable Design: Tailored specifications from our China factory.
- Cost-Effective Durability: Reduces maintenance with robust cobalt alloy properties.
Applications of Stellite8 Cobalt Alloy Tube
Stellite8 Cobalt Alloy Tube is valued for its versatile cobalt alloy uses across industries, including:
- Oil and Gas: Piping for corrosive fluids and high-pressure systems.
- Aerospace: Components enduring high temperatures and stress.
- Chemical Processing: Handling aggressive chemicals with minimal wear.
- Power Generation: Boiler and turbine systems in extreme conditions.
- Marine: Resistant to saltwater corrosion for offshore applications.
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Cobalt (Co) | Balance (approx. 48-53%) |
| Chromium (Cr) | 27-31% |
| Tungsten (W) | 8-10% |
| Nickel (Ni) | 1-3% |
| Carbon (C) | 0.8-1.2% |
| Iron (Fe) | ≤3% |
| Others | ≤1% (Si, Mn, etc.) |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 900-1050 MPa |
| Yield Strength | 600-750 MPa |
| Elongation | 12-18% |
| Hardness (HRC) | 36-42 |
| Density | 8.5 g/cm³ |
Chemical Properties
The cobalt alloy properties of Stellite8 provide excellent resistance to acids (e.g., sulfuric, hydrochloric) and alkalis, making it suitable for corrosive environments. Avoid prolonged exposure to strong oxidizing agents like nitric acid. Stellite8 Cobalt Alloy Tube adheres to environmental standards, but cobalt recycling is recommended due to resource scarcity.
Things to Note (Limitations)
- High-Temperature Limits: Oxidation risk above 1100°C may reduce performance.
- Brittleness Risk: High carbon content can cause cracking under extreme stress.
- Higher Cost: Cobalt alloy price is elevated compared to stainless steel.
- Machining Difficulty: Requires specialized tools due to material hardness.
Corrosion Data for Stellite8 Cobalt Alloy Tube
| Environment | Corrosion Rate (mm/year) |
|---|---|
| Atmospheric (Urban) | <0.01 |
| Seawater | 0.02-0.06 |
| 10% Sulfuric Acid | 0.06-0.12 |
| 10% Hydrochloric Acid | 0.1-0.25 |
Best Welding and Manufacturing Practices
Stellite8itled for TIG (Tungsten Inert Gas) and plasma arc welding to ensure robust joints. Preheating to 150-250°C minimizes cracking risks. Fabrication methods include:
- Cutting: Use carbide or diamond tools for precision.
- Forming: Hot forming at 950-1050°C for best results.
- Machining: Employ high-speed tools with coolant to manage heat.
What Customers Say About
Frequently Asked Questions
Q: How does Stellite8 differ from other Stellite alloys?
A: Stellite8 has lower carbon and tungsten content than Stellite 4, offering better ductility and slightly less wear resistance.
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Q: What are the key applications of Stellite8 Cobalt Alloy Tube?
A: It’s used in oil and gas, aerospace, chemical processing, and marine industries for its durability.
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Q: Is it suitable for high-temperature environments?
A: Yes, up to 1150°C, but oxidation risks increase beyond this limit.
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Q: Does Stellite8 meet environmental standards?
A: Yes, it complies with global regulations; recycling is advised due to cobalt scarcity.
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Q: What welding methods work best for Stellite8?
A: TIG and plasma arc welding are recommended for strong, reliable welds.