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Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys |
Type | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni80 | Cr20Ni30 | Cr25Ni20 | |
Performance | |||||||
Main Chemical composition | Ni | Rest | 55.0-61.0 | 34.0-37.0 | Rest | 30.0-30.4 | 19.0-22.0 |
Cr | 28.0-31.0 | 15.0-18.0 | 18.0-21.0 | 20.0-23.0 | 18.0-21.0 | 24.0-26.0 | |
Fe | ≤ 1.0 | Rest | Rest | ≤ 1.0 | Rest | Rest | |
Max. continuous service temp. of element | 1250 | 1150 | 1100 | 1200 | 1100 | 1050 | |
Resistivity at 20℃ ( μΩ m) | 1.18±0.05 | 1.12±0.05 | 1.04±0.05 | 1.09±0.05 | 1.06±0.05 | 0.95±0.05 | |
Density(g/cm³) | 8.10 | 8.20 | 7.90 | 8.40 | 7.90 | 7.15 | |
Thermal conductivity (KJ/m h ℃) | 45.2 | 45.2 | 43.5 | 60.3 | 43.8 | 43.8 | |
Coefficient of lines expansion(αx10-6/℃ ) | 17.0 | 17.0 | 19.0 | 18.0 | 19.0 | 19.0 | |
Melting point(αpprox.) (℃ ) | 1380 | 1390 | 1390 | 1400 | 1390 | 1400 | |
Elongation at rupture(%) | > 20 | > 20 | > 20 | > 20 | > 20 | > 20 | |
Micrographic structure | austenite | austenite | austenite | austenite | austenite | austenite | |
Magnetic properties | nonmagnetic | Low-magnetic | Low-magnetic | nonmagnetic | Low-magnetic | nonmagnetic |
Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys |
Type | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni80 | Cr20Ni30 | Cr25Ni20 | |
Performance | |||||||
Main Chemical composition | Ni | Rest | 55.0-61.0 | 34.0-37.0 | Rest | 30.0-30.4 | 19.0-22.0 |
Cr | 28.0-31.0 | 15.0-18.0 | 18.0-21.0 | 20.0-23.0 | 18.0-21.0 | 24.0-26.0 | |
Fe | ≤ 1.0 | Rest | Rest | ≤ 1.0 | Rest | Rest | |
Max. continuous service temp. of element | 1250 | 1150 | 1100 | 1200 | 1100 | 1050 | |
Resistivity at 20℃ ( μΩ m) | 1.18±0.05 | 1.12±0.05 | 1.04±0.05 | 1.09±0.05 | 1.06±0.05 | 0.95±0.05 | |
Density(g/cm³) | 8.10 | 8.20 | 7.90 | 8.40 | 7.90 | 7.15 | |
Thermal conductivity (KJ/m h ℃) | 45.2 | 45.2 | 43.5 | 60.3 | 43.8 | 43.8 | |
Coefficient of lines expansion(αx10-6/℃ ) | 17.0 | 17.0 | 19.0 | 18.0 | 19.0 | 19.0 | |
Melting point(αpprox.) (℃ ) | 1380 | 1390 | 1390 | 1400 | 1390 | 1400 | |
Elongation at rupture(%) | > 20 | > 20 | > 20 | > 20 | > 20 | > 20 | |
Micrographic structure | austenite | austenite | austenite | austenite | austenite | austenite | |
Magnetic properties | nonmagnetic | Low-magnetic | Low-magnetic | nonmagnetic | Low-magnetic | nonmagnetic |