Physical properties
| Density | 8.4 | g/cm³ |
| Modulus E | 222 | GPa |
| Thermal conductivity | 12 | W/(m·K) |
| Thermal expansion | 11.9 | ×10⁻⁶/K |
| Specific heat | 0.43 | kJ/(kg·K) |
| Resistivity | 1.15 | Ω·mm²/m |
Informative values: they vary with composition, condition and test method. Use the governing standard or measured mill data for pressure and heat-transfer calculations.
Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements8 elements | |||
| Ni | Nickel | Bal. | |
| Co | Cobalt | 19 – 21% | |
| Cr | Chromium | 19 – 21% | |
| Mo | Molybdenum | 5.6 – 6.1% | |
| Ti+Al | Titanium + aluminium | 2.4 – 2.8% | |
| Ti | Titanium | 1.9 – 2.4% | |
| Al | Aluminium | 0.3 – 0.6% | |
| C | Carbon | 0.04 – 0.08% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual4 elements | |||
| Fe | Iron | ≤ 0.7% | |
| S | Sulphur | ≤ 0.007% | |
| B | Boron | ≤ 0.005% | |
| Cu | Copper | ≤ 0.2% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar and extruded sections for machining (HR 10A) | Supplied solution treated at 1150 ± 10 °C, water quenched; service condition after ageing at 800 ± 10 °C for 8 h, air cooled; tensile at 780 °C | ≥ 540 | ≥ 400 | ≥ 12 | Also specified: Hardness ≤ 255 HBW |
| Forgings (HR 10D) | Forged from HR 10C stock, supplied solution treated at 1150 ± 10 °C, water quenched; service condition after ageing at 800 ± 10 °C for 8 h, air cooled; tensile at 780 °C | ≥ 540 | ≥ 400 | ≥ 12 | Also specified: Hardness ≤ 229 HBW |
| Plate, sheet and strip | |||||
| Plate, sheet, strip and foil | Solution treated at 1900–2150 °F [1038–1177 °C], cooled at the air-cooling rate or faster; response specimens aged at 802 ± 8 °C for 8 ± 0.5 h, air cooled; tensile at 779 °C | ≥ 541 (78 ksi) | ≥ 403 (58 ksi) | ≥ 9 | |
| Several forms | |||||
| Long and flat products (2.4650) | Precipitation hardened (+P), tensile at 780 °C; EN 10302 non-pressure, non-aerospace use only | ≥ 540 | ≥ 400 | ≥ 12 | |
Creep behaviour
Guidance values (MPa) — Mean values of a scatter band. They are neither an acceptance requirement nor a design allowable stress. Figures in parentheses are long-term extrapolations and less reliable than the tested range.
| Temp °C | Creep strength Rp1.0 (1% plastic strain) | Rupture strength Ru | ||
|---|---|---|---|---|
| 10 000 h | 100 000 h | 10 000 h | 100 000 h | |
| 500 | 562 | 543 | 800 | 775 |
| 600 | 500 | 440 | 550 | 465 |
| 650 | 410 | 330 | 450 | 370 |
| 700 | 310 | 230 | 345 | 250 |
| 750 | 200 | 105 | 220 | 135 |
| 800 | 90 | 35 | 125 | 68 |
| 850 | 30 | 11 | 64 | 33 |
| 900 | 10 | 3.5 | 32 | 17 |
Thermal expansion and elastic modulus
| Temperature range | Mean coefficient ×10⁻⁶/K |
|---|---|
| 20–200 °C | 11.9 |
| 20–300 °C | 12.5 |
| 20–400 °C | 13.1 |
| 20–600 °C | 14.2 |
| 20–800 °C | 16.2 |
| 20–1000 °C | 18.2 |
Elastic modulus vs temperature
| Temp °C | E GPa |
|---|---|
| 20 | 222 |
| 100 | 218 |
| 200 | 212 |
| 300 | 206 |
| 400 | 199 |
| 500 | 192 |
| 600 | 184 |
| 700 | 176 |
| 800 | 165 |
| 900 | 159 |
| 1000 | 143 |
Where this grade is recommended
Matched in 1 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Engine & exhaust valves | Automotive & Racing | 500 – 750 °C | 3 / 7 | 88 |
Designations & equivalents
| W.Nr. (Germany) | 2.4650 |
| EN designation | NiCo20Cr20MoTi |
| Trade name(s) | Nimonic 263 / Haynes 263 |
| AMS (SAE aerospace) | 5872 |
| BS (UK) | HR 10 (bar/billet/forging) · HR 206 (sheet/plate/strip) · HR 404 (seamless tube) |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
5 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is Alloy 263 · UNS N07263?
Alloy 263 · UNS N07263 — Ni superalloys. High-ductility sheet — combustors and rings
What is the maximum service temperature of N07263?
Typically about 850 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of N07263?
The specification sets an elevated-temperature test: minimum tensile strength 541 MPa at 779 °C for the main product form — not a room-temperature value. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover N07263?
AMS 5872G, BS 2HR, BS HR 206, BS HR 404, EN 10302 (creep-resisting steels, nickel and cobalt alloys)
Where is N07263 typically used?
Engine & exhaust valves (Automotive & Racing)
In which forms is N07263 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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