Haynes 188
Cobalt-nickel-chromium-tungsten superalloy with excellent high-temperature strength and oxidation.
Material overview
Haynes 188 is recorded in the Cobalt-Based Alloys catalog. Cobalt-nickel-chromium-tungsten superalloy with excellent high-temperature strength and oxidation. Its recorded characteristics include Outstanding oxidation resistance to about 980 C, good sulfidation resistance, and lanthanum improves scale adhesion. Typical applications include Gas-turbine combustors and transition liners and high-temperature sheet and assemblies. The dataset currently includes 14 property records covering chemical composition, mechanical properties, and physical properties. Related standards include B637 and GB/T 14992; product form data covers Sheet / Coil and Forged Product. The final chemistry, condition, dimensions, test requirements, and documentation package must be confirmed before order acceptance.
Key characteristics
- Outstanding oxidation resistance to about 980 C
- good sulfidation resistance
- lanthanum improves scale adhesion
Typical applications
- Gas-turbine combustors and transition liners
- high-temperature sheet and assemblies
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 |
| Ni | 20.0-24.0 | wt% | Typical value |
| Cr | 20.0-24.0 | wt% | Typical value |
| W | 13.0-16.0 | wt% | Typical value |
| Fe | 3.0 max | wt% | Typical value |
| La | 0.03-0.12 | wt% | Typical value |
| C | 0.05-0.15 | wt% | Typical value |
| Mn | 1.25 max | wt% | Typical value |
| Si | 0.2-0.5 | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Tensile strength | min 860 | MPa | Solution annealed |
| Yield strength 0.2% | min 380 | MPa | Solution annealed |
| Elongation | min 30 | % | Solution annealed |
Physical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Density | 9 | g/cm3 | Typical |
| Melting range | 1300-1355 | C | Typical |
Standards and specifications
Forms, applications, and capabilities
Product forms
- Product form
- Product form
Industries
- Industry
Capabilities
- Vacuum Induction Melting
- Capability
- Capability
- Heat Treatment
- Nondestructive & Laboratory Testing