This Cobalt-Chromium-Nickel alloy gives a combination of high strength, ductility and good mechanical properties and is age hardenable. Phynox† also has excellent fatigue life, corrosion resistance in numerous environments and is non-magnetic.
Use where a high resistance to corrosion and / or low relaxation at temperatures up to 380oC (715oF) are required. This alloy is used in medical devices, dental products, surgical implants and orthopedics.
Phynox is also known as Elgiloy, Alloy 3J21 and Conichrome.
| Element | Min % | Max % |
| C | – | 0.15 |
| Mn | 1.50 | 2.50 |
| Si | – | 1.20 |
| P | – | 0.015 |
| S | – | 0.015 |
| Cr | 19.00 | 21.00 |
| Ni | 14.00 | 16.00 |
| Co | 39.00 | 41.00 |
| Mo | 6.00 | 8.00 |
| Be | – | 0.10 |
| Fe | bal | |
Density
8.3 g/cm³ | 0.300 lb/in³
Melting Point
1427 °C | 2600 °F
Coefficient of Expansion
12.5 μm/m °C (20 – 100°C) | 7.0 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
77 kN/mm² | 11168 ksi
Modulus of Elasticity
203.4 kN/mm² | 29501 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed | – | – | – | – | – |
| Spring Temper | Age Harden | 520 | 970 | 5 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | < 1100 | < 160 | -185 to +450 | -300 to +840 |
| Spring Temper | 1400 – 1900 | 203 – 276 | -185 to +450 | -300 to +840 |
| Spring Temper + Aged | 1900 – 2200 | 276 – 319 | -185 to +450 | -300 to +840 |