Alloy 263 (UNS N07263)
Age-hardenable nickel–cobalt–chromium–molybdenum sheet alloy prized for fabricability in hot-gas-path structures.
- UNS
- N07263
- W.Nr / EN
- 2.4650
- Density
- 8.36 g/cm³
- Service range
- To ~850 °C
About Alloy 263
Alloy 263 was developed to give fabricators an age-hardenable superalloy that is genuinely easy to form and weld in the solution-treated condition, then hardened to strength after fabrication. It offers excellent intermediate-temperature ductility and stable properties in service to about 850 °C.
The grade is a standard for combustion-chamber rings, casings and other fabricated hot-gas-path structures where formability decides manufacturing cost. DMK Alloys supplies Alloy 263 as sheet-route blanks, rings, bars and shaped components.
Alloy 263 chemical composition (weight %)
| Element | Limit / range |
|---|---|
| Ni | Balance |
| Co | 19.0 – 21.0 |
| Cr | 19.0 – 21.0 |
| Mo | 5.6 – 6.1 |
| Ti | 1.9 – 2.4 |
| Al | 0.30 – 0.60 |
| Ti + Al | 2.4 – 2.8 |
| Fe | ≤ 0.7 |
| C | 0.04 – 0.08 |
| Mn | ≤ 0.6 |
| Si | ≤ 0.4 |
| Cu | ≤ 0.2 |
Composition limits per the commonly referenced standards listed below. Order-specific limits may differ — confirm against the governing specification.
Alloy 263 mechanical properties (typical)
| Condition / form | Tensile, MPa | 0.2% Yield, MPa | Elongation, % |
|---|---|---|---|
| Sheet, solution treated + aged, room temp. | ≥ 970 | ≥ 580 | ≥ 30 |
Values are typical or specification-minimum levels for guidance only — not a guarantee of properties. Certified values are established by testing against the ordered specification.
Alloy 263 specifications & international equivalents
| System | Designation | Covers |
|---|---|---|
| UNS | N07263 | All product forms |
| AMS | AMS 5872 | Sheet, strip, plate |
| AMS | AMS 5886 | Bars, forgings |
| W.Nr / EN | 2.4650 · NiCo20Cr20MoTi | European cross-reference |
Cross-references are for guidance; the governing document is always the specification cited on your purchase order or drawing.
Alloy 263 physical properties
| Property | Typical value |
|---|---|
| Density | 8.36 g/cm³ |
| Melting range | 1300 – 1355 °C |
| Modulus of elasticity (family-typical) | ≈ 200 – 220 GPa |
| Indicative service range | To ~850 °C |
Forms we manufacture
- Sheet and plate blanks
- Rings
- Bars
- Fabricated components to drawing
Dimensional ranges and delivery conditions are confirmed per enquiry.
Where Alloy 263 earns its keep
Typically specified for:
- Combustor casings
- Rings
- Transition ducts
- Exhaust structures
- Other fabricated hot-gas-path parts
Also consider
Alloy 625
UNS N06625 · W.Nr 2.4856AMS 5666 · AMS 5599
Solid-solution nickel–chromium–molybdenum–niobium alloy with outstanding corrosion resistance and strength without age hardening.
Alloy 90
UNS N07090 · W.Nr 2.4632BS HR 2 · 2.4632 · NiCr20Co18Ti
Cobalt-strengthened development of Alloy 80A with higher creep-rupture capability for hotter blading and springs.
Alloy X
UNS N06002 · W.Nr 2.4665AMS 5536 · AMS 5754
Solid-solution nickel–chromium–iron–molybdenum alloy with an exceptional record in combustor and furnace hardware.
Request Alloy 263 to your specification
State the governing standard, form, dimensions, quantity and testing requirements — the export team responds with a manufacturer's quotation.