Cobalt HS-6 Sheets & Plates

What are Cobalt HS-6 Sheets & Plates?

Cobalt HS-6, also known as Stellite 6, is a cobalt-chromium-tungsten alloy designed for exceptional wear resistance, corrosion resistance, and high-temperature performance. It is widely used in applications where components are exposed to abrasion, heat, and corrosive environments.

Key Functions:

• Provide excellent wear and abrasion resistance
• Perform efficiently at high temperatures
• Resist corrosion and oxidation
• Ensure long-lasting durability in harsh conditions

Chemical Composition of Cobalt HS-6

Typical Composition:

• Cobalt (Co): Balance
• Chromium (Cr): 27% – 32%
• Tungsten (W): 4% – 6%
• Carbon (C): 1% – 1.4%
• Nickel (Ni): ≤ 3%
• Iron (Fe): ≤ 3%

This composition provides a combination of hardness, strength, and corrosion resistance.

Key Features of Cobalt HS-6 Sheets & Plates

• Exceptional wear and abrasion resistance
• Excellent high-temperature strength
• Superior resistance to corrosion and oxidation
• Good resistance to galling and metal-to-metal wear
• Maintains hardness at elevated temperatures
• Long service life in extreme conditions

Mechanical Properties

• Hardness: ~40–55 HRC
• Tensile Strength: High
• Yield Strength: Moderate to high
• Impact Resistance: Good

Physical Properties

• Density: ~8.4 – 8.8 g/cm³
• Melting Range: ~1280–1390°C
• Modulus of Elasticity: ~210 GPa
• Thermal Conductivity: Moderate
• Thermal Expansion: Moderate

Corrosion Resistance

Cobalt HS-6 sheets and plates provide excellent resistance to:

• Oxidation at high temperatures
• Corrosive industrial environments
• Wear combined with corrosion
• Chemical exposure

This makes it suitable for both high-temperature and corrosive applications.

Heat Treatment

Cobalt HS-6 is generally used in as-cast or work-hardened condition.

Process:

• Stress relieving (if required)

It retains hardness even without extensive heat treatment.

Weldability

Cobalt HS-6 offers good weldability with proper techniques.

Welding Methods:

• TIG (GTAW)
• MIG (GMAW)

Best Practices:

• Preheat may be required
• Control heat input carefully
• Use compatible filler materials

Machinability

• Difficult to machine due to high hardness
• Requires rigid setup and tooling
• Use carbide or ceramic tools
• Maintain low cutting speeds

Standards & Specifications

• ASTM F75 (reference for cobalt alloys)
• UNS R30006 (Stellite 6 equivalent)
• AMS standards (where applicable)

Available Forms of Cobalt HS-6

We offer:

• Hot Rolled Plates
• Cold Rolled Sheets
• Ground Plates
• Polished Sheets
• Custom Cut Sizes

Sizes & Specifications

• Thickness: 1 mm to 50 mm
• Width: Up to 1500 mm
• Length: Up to 3000 mm or as required

Applications of Cobalt HS-6 Sheets & Plates

• Oil & Gas Industry: Valve seats and wear parts
• Power Generation: Turbine components
• Aerospace Industry: High-temperature parts
• Chemical Processing: Corrosion-resistant components
• Tooling Industry: Wear-resistant tools

Quality Testing & Inspection

• Chemical composition testing
• Hardness testing
• Dimensional inspection
• Surface quality inspection
• Positive Material Identification (PMI)

Mill Test Certificates (MTC) and third-party inspection reports are provided.

Packaging & Delivery

• Export-grade wooden packaging
• Protective wrapping
• Proper labeling and traceability
• Safe and timely global delivery

Why Choose Virami Steel Hub?

• Trusted Cobalt HS-6 supplier in Mumbai
• Premium quality materials
• Competitive pricing
• Custom sizes available
• International standards compliance
• Strong export network
• Dedicated customer support

Conclusion

Cobalt HS-6 Sheets & Plates are ideal for extreme wear, high-temperature, and corrosive environments. Their ability to retain hardness and strength under severe conditions makes them a preferred choice for critical industrial applications.

Virami Steel Hub ensures high-quality Cobalt HS-6 products that deliver durability, reliability, and long-term performance.