Inconel 690
High-chromium nickel alloy with good resistance to aqueous corrosion and high-temperature industrial environments.
Material overview
Inconel 690 is recorded in the Nickel-Based Alloys catalog. Specialty alloy for industrial applications. Its recorded characteristics include Very high chromium for outstanding resistance to oxidizing acids and intergranular attack. Typical applications include nitric-acid service, coal-gasification, and petrochemical. The dataset currently includes 14 property records covering chemical composition, mechanical properties, and physical properties. Related standards include B163, B166, and GB/T 15007; product form data covers Seamless Pipe / Tube and Bar / Rod. The final chemistry, condition, dimensions, test requirements, and documentation package must be confirmed before order acceptance.
Key characteristics
- Very high chromium for outstanding resistance to oxidizing acids and intergranular attack
Typical applications
- nitric-acid service
- coal-gasification
- petrochemical
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 |
|---|---|---|---|
| Ni | 58.0 min | wt% | Typical value |
| Cr | 27.0-31.0 | wt% | Typical value |
| Fe | 7.0-11.0 | wt% | Typical value |
| C | 0.05 max | wt% | Typical value |
| Mn | 0.5 max | wt% | Typical value |
| Si | 0.5 max | wt% | Typical value |
| Cu | 0.5 max | wt% | Typical value |
| Al | 0.5 max | wt% | Typical value |
| Ti | 0.5 max | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Tensile strength | min 586 | MPa | Annealed |
| Yield strength 0.2% | min 241 | MPa | Annealed |
| Elongation | min 30 | % | Annealed |
Physical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Density | 8.19 | g/cm3 | Typical |
| Melting range | 1343-1377 | C | Typical |