Hunan Fushun Metal Co., Ltd.
Hunan Fushun Metal Co., Ltd.
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A precipitation hardenable Nickel-Iron-Chromium alloy having outstanding controllable thermoelastic coefficient characteristics and excellent oxidation resistance in high temperature atmospheres. The alloy can be processed to have a constant modulus of elasticity at temperatures ranging from -45 to +65°C (-50 to +150°F).
Diameter: 0.1 - 40mm
Shape: round, square, flat, special shaped
Outstanding controllable thermoelastic coefficient characteristics.
Can be processed to have constant modulus of elasticity from from -45 to +65ºC (-50 to +150ºF).
Good for springs in watches and weighing equipment.
Age hardenable.
Springs in precise applications, such as
watches
weighing machines
UNS N09902
AWS 080
AMS 5225
AMS 5221
HS 261
| Element | Min % | Max % |
| C | – | 0.06 |
| Mn | – | 0.8 |
| Si | – | 1 |
| P | – | 0.04 |
| S | – | 0.04 |
| Cr | 4.9 | 5.75 |
| Ni+Co | 41 | 43.5 |
| Ti | 2.2 | 2.75 |
| Al | 0.3 | 0.8 |
| Cr+(Ti-4xC) | 7.1 | 8.1 |
| Co | – | 1 |
| Fe | Bal | Bal |
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
| 8.05 g/cm³ | 1480 °C | 7.6 μm/m °C (20 – 100 °C) | 62 – 69 kN/mm² | 165 – 200 kN/mm² |
| 0.291 lb/in³ | 2700 °F | 4.2 x 10-6 in/in °F (70 – 212 °F) | 8993 – 10008 ksi | 23932 – 29008 ksi |
| Condition | Type | Temperature | Time | Cooling |
| Spring Temper – For good all round properties | Age Harden | 650 °C (1200 °F) | 2 Hr | Air |
| Spring Temper – For max stability | Stress Equalise Age Harden |
400 °C (750 °F) 650 °C (1200 °F) |
2 Hr 2 Hr |
Air Air |
| Spring Temper – For minimum hysterisis & low thermoelastic coefficient | Stress Equalise | 400 °C (750 °F) | 2 Hr | Air |
| Annealed | Approx. tensile strength | <800 N/mm² | <116 ksi |
| Approx. operating temperature (for constant modulus applications) | -45 to +65 °C | -50 to +150 °F | |
| Spring Tempered | Approx. tensile strength | 900 – 1100 N/mm² | 131 – 159 ksi |
| Approx. operating temperature (for constant modulus applications) | -45 to +65 °C | -50 to +150 °F | |
| Spring Temper + Aged | Approx. tensile strength | 1300 – 1500 N/mm² | 189 – 218 ksi |
| Approx. operating temperature (for constant modulus applications) | -45 to +65 °C | -50 to +150 °F |