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Knowledge about nickel-chromium alloy
1 chromium alloy, high temperature resistance strength is higher than iron-chromium aluminum alloy, not easy to deformation at high temperature, long-term use of good plasticity, no magnetism, has the characteristics of large resistivity, heat fatigue resistance, oxidation resistance and high temperature shape stability. Nickel-chromium alloy is widely used in the manufacture of various industrial electric furnace, civil electric furnace furnace wire, radiation tube and other heating component
2 Main properties of nickel-chromium alloy
| Grade | C | P | S | Mn | Si | Cr | Ni | Al | Fe |
| Cr15Ni60 | ≤0.08 | ≤0.02 | ≤0.015 | ≤0.60 | 0.75-1.60 | 15.0-18.0 | 55.0-61.0 | ≤0.5 | Balance |
| Cr80Ni20 | ≤0.08 | ≤0.02 | ≤0.015 | ≤0.60 | 0.75-1.60 | 20.0-23.0 | Balance | ≤0.5 | Balance |
| Cr20Ni35 | ≤0.1 | ≤0.03 | ≤0.025 | ≤1.0 | 1.0-3.0 | 18.0-21.0 | 34.0-37.0 | ≤0.5 | Balance |
Physical Property
| Grade | maximum operation temperature℃ | melting point℃ | density g/cm3 | resistivity 20℃ mm/m |
| Cr15Ni60 | 1150 | 1350 | 8.2 | 1.12±0..06 |
| Cr15Ni60 | 1200 | 1400 | 8.4 | 1.14±0..05 |
| Cr20Ni35 | 1100 | 1350 | 8.0 | 1.0±0..05 |
3 Nickel-chromium alloy supply status
⑴Supply status of wire：
A. Cold pull wire after annealing, to supply with soft products
B. The wire surface shall be acid-washed or oxidized.
C. Hot rolled disc strip is supplied by pickling and bright.
⑵Supply status of the strip：
A. Cold rolled strip returned with soft products.
B. If the user has no special requirements, the surface without pickling.
C. Flat filament is supplied in a bright and soft state after being annealed by a protective gas.
4 Nickel-chromium alloy supply specifications
Bar: between ￠ 10- ￠ 30mm
Line: between ￠ 0.06- ￠ 10mm
Microfilaments: between the ￠0.01-0.06mm s
Foil belt: 0.01-5mm in thickness
Width is 0.1-500mm