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Model No: NI-SPAN-C Alloy 902
AMS 5225 / UNS N09902 / NI-SPAN-C Alloy 902
NI-SPAN-C Alloy 902 is a precipitation hardenable nickel-iron-chromium alloy with a thermoelastic coefficient that can be controlled by the amount of cold work and heat treatment temperature to fit a specific application’s needs.
Delivery :
FOB
minimum order :
50 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
NI-SPAN-C Alloy 902 is a precipitation hardenable nickel-iron-chromium alloy with a thermoelastic coefficient that can be controlled by the amount of cold work and heat treatment temperature to fit a specific application’s needs. Alloy 902 also has low magnetostrictive properties appropriate for specific applications and has been successfully utilized at cryogenic temperatures.
UNS N09902 made precipitation hardenable by additions of aluminum and titanium. The titanium content also helps provide a controllable thermoelastic coefficient, which is the alloy's outstanding characteristic. The alloy can be processed to have a constant modulus of elasticity at temperatures from -50°F to 150°F (-45 to 65°C). Used for precision springs, mechanical resonators, and other precision elastic components. Standard product forms are round, strip, tube, pipe, and wire.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| C | – | 0.06 |
| Mn | – | 0.80 |
| Si | – | 1.00 |
| P | – | 0.04 |
| S | – | 0.04 |
| Cr | 4.90 | 5.75 |
| Ni+Co | 41.00 | 43.50 |
| Ti | 2.20 | 2.75 |
| Al | 0.30 | 0.80 |
| Cr+(Ti-4xC) | 7.10 | 8.10 |
| Co | – | 1.00 |
| Fe | Bal | Bal |
Applications
Precision instruments, Resonant vibrating systems, Tuning forks, Springs
Other Designations
Equivalent materials to NI SPAN C Alloy 902 are:
AMS 5221
AMS 5223
AMS 5225
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.05 g/cm³ | 0.291 lb/in³ |
| Melting point | 1450-1480°C | 2640-2700°F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength (precipitation hardened) | 1210 MPa | 175000 psi |
| Yield strength (@strain 0.200%, precipitation hardened) | 760 MPa | 110000 psi |
| Elastic modulus | 165-200 GPa | 23900-29000 ksi |
| Shear modulus | 62-69 GPa | 8990-10000 ksi |
| Elongation at break (precipitation hardened) | 25% | 25% |
Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-100°C/68-212°F) | 7.60 µm/m°C | 4.22 µin/in°F |
| Thermal conductivity | 12.1 W/mK | 84 BTU in/hr.ft².°F |
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