Nimonic® C-263 is also known as Nicrofer 5120 CoTi, Haynes 263, and Hastelloy C-263.
| Element | Min % | Max % |
| C | 0.04 | 0.08 |
| Si | – | 0.40 |
| Mn | – | 0.60 |
| S | – | 0.007 |
| Ag | – | 0.0005 |
| AI | 0.30 | 0.60 |
| B | – | 0.005 |
| Bi | – | 0.0001 |
| Co | 19.0 | 21.0 |
| Cr | 19.0 | 21.0 |
| Cu | – | 0.20 |
| Fe | – | 0.70 |
| Mo | 5.60 | 6.10 |
| Pb | – | 0.002 |
| Ti | 1.90 | 2.40 |
| Ti+AI | 2.40 | 2.80 |
| Ni | Bal | |
Density
8.36 g/cm3 | 0.302 lb/in³
Melting Point
1325 °C | 2415 °F
Modulus of Elasticity
222.5 kN/mm² | 32270 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | Age Harden | 800 | 1475 | 8 hours | Air |
| Spring temper | Anneal Age Harden |
1040 – 1165 800 |
1900 – 2125 1475 |
Suited to diameter 8 Hours |
Water or Air Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1000 | 116 – 145 | up to 800 | up to 1500 |
| Annealed + Aged | 1000 – 1200 | 145 – 174 | up to 800 | up to 1500 |
| Spring Temper | 1200 – 1500 | 174 – 217 | up to 800 | up to 1500 |
| Spring Temper + Annealed + Aged | 1000 – 1200 | 145 – 174 | up to 800 | up to 1500 |