Alloy 263/UNS N07263
Grade: Haynes 263/UNS N07263/Nimonic 263
Sheet/Plate: 0.3mm-150mm
Strip/Foil: 0.02mm-16mm
Pipe: 6mm*0.5mm-1200mm*100mm
Bar: Ф6mm – Ф600mm
Wire: Ф0.01mm – Ф6mm
Others: Forged Rings, Flanges, Elbows, Tees, Reducers etc.
Standard: ASTM/ASME/AMS
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HAYNES 263, also known commercially as NIMONIC 263, is an age-hardenable nickel cobalt chromium molybdenum alloy. Gamma-prime precipitation provides elevated-temperature strength, while the annealed material offers good forming and welding behavior. Its fabrication characteristics make it useful for complex turbine components. It is commonly considered for service up to approximately 900°C, with material condition and component stresses determining the practical operating limit.
Chemical composition
| Element | Weight percent | Element | Weight percent |
| Ni | Balance | Co | 20 |
| Cr | 20 | Mo | 6 |
| Fe | 0.70 max | Mn | 0.40 |
| Si | 0.20 | Al | 0.60 max |
| Ti | 2.40 max | C | 0.06 |
| B | 0.005 max | Zr | 0.04 max |
| Al + Ti | 2.60 | — | — |
Mechanical properties
Cold-rolled sheet, mill annealed then aged at 800°C for 8 h and air cooled. Manufacturer typical tensile data.
| Test temperature °C | 0.2% yield MPa | Tensile MPa | Elongation % |
| RT | 615 | 1041 | 35.8 |
| 649 | 518 | 901 | 36.9 |
| 760 | 524 | 696 | 26.6 |
| 871 | 296 | 348 | 58.1 |
Source: Haynes International 263 alloy data. Typical values; not purchase acceptance limits.
Application areas
- Aircraft turbine fabricated components
- Industrial gas turbine components
- Low-temperature combustors
- Transition liners and selected ring components


HAYNES 263, also known commercially as NIMONIC 263, is an age-hardenable nickel cobalt chromium molybdenum alloy. Gamma-prime precipitation provides elevated-temperature strength, while the annealed material offers good forming and welding behavior. Its fabrication characteristics make it useful for complex turbine components. It is commonly considered for service up to approximately 900°C, with material condition and component stresses determining the practical operating limit.
Chemical composition
| Element | Weight percent | Element | Weight percent |
| Ni | Balance | Co | 20 |
| Cr | 20 | Mo | 6 |
| Fe | 0.70 max | Mn | 0.40 |
| Si | 0.20 | Al | 0.60 max |
| Ti | 2.40 max | C | 0.06 |
| B | 0.005 max | Zr | 0.04 max |
| Al + Ti | 2.60 | — | — |
Mechanical properties
Cold-rolled sheet, mill annealed then aged at 800°C for 8 h and air cooled. Manufacturer typical tensile data.
| Test temperature °C | 0.2% yield MPa | Tensile MPa | Elongation % |
| RT | 615 | 1041 | 35.8 |
| 649 | 518 | 901 | 36.9 |
| 760 | 524 | 696 | 26.6 |
| 871 | 296 | 348 | 58.1 |
Source: Haynes International 263 alloy data. Typical values; not purchase acceptance limits.
Application areas
- Aircraft turbine fabricated components
- Industrial gas turbine components
- Low-temperature combustors
- Transition liners and selected ring components
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