Stellite 6
The most widely used cobalt alloy, balancing wear, corrosion and impact resistance.
Material overview
The Cobalt-Based Alloys catalog describes Stellite 6 as follows: The most widely used cobalt alloy, balancing wear, corrosion and impact resistance. Reviewers should evaluate All-purpose hardfacing alloy, good abrasion, corrosion and heat resistance, and tolerates moderate impact. The grade record lists Valve seats and gates, pump shafts and sleeves, screw conveyors, hot-working dies, and engine valves among typical applications. The dataset currently includes 12 property records covering chemical composition, mechanical properties, and physical properties. Standards and form records reference A5.21 and A5.13 and Bar / Rod, Cast Product, and Solid Wire / GTAW-GMAW Wire. Final supply conditions remain subject to specification, inspection, and export-control review.
Key characteristics
- All-purpose hardfacing alloy
- good abrasion, corrosion and heat resistance
- tolerates moderate impact
Typical applications
- Valve seats and gates
- pump shafts and sleeves
- screw conveyors
- hot-working dies
- engine valves
Grade names and equivalents
Technical properties
Typical values are for reference only. Final chemistry, mechanical properties, heat treatment, dimensions, inspection, and documentation are confirmed against the applicable specification and MTC/COA before order acceptance.
Chemical composition
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Co | balance | wt% | Typical value |
| Cr | 27.0-31.0 | wt% | Typical value |
| W | 3.5-5.5 | wt% | Typical value |
| C | 0.9-1.4 | wt% | Typical value |
| Ni | 3.0 max | wt% | Typical value |
| Fe | 3.0 max | wt% | Typical value |
| Mo | 1.0 max | wt% | Typical value |
| Mn | 1.0 max | wt% | Typical value |
| Si | 1.0 max | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Hardness | 39-45 HRC | HRC | As cast / as deposited |
Physical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Density | 8.44 | g/cm3 | Typical |
| Melting range | 1285-1410 | C | Typical |
Standards and specifications
Forms, applications, and capabilities
Product forms
- Bar / Rod
- Product form
- Product form
Industries
- Industry
- Petrochemical & Chemical
- Industry
- Industry
Capabilities
- Vacuum Induction Melting
- Capability
- Capability
- Heat Treatment
- Nondestructive & Laboratory Testing