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Oxidation Color Chromel A Nickel Chromium Strip for Soldering Irons
Chromel A is used for electric heating elements in home appliances and industrial furnaces. Typical applications are flat irons, ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular elements and cartridge elements.
- electrical parts and electronic components.
- electric heating elements (home & industrial use).
- industrial furnaces up to 1200 °C.
- heating cables, mats and cords.
| Grade | Ni80Cr20 | Ni70Cr30 | Ni60Cr23 | Ni60Cr15 | Ni35Cr20 | Karma | Evanohm | |
| Nominal composition% | Ni | Bal | Bal | 58.0-63.0 | 55.0-61.0 | 34.0-37.0 | Bal | Bal |
| Cr | 20.0-23.0 | 28.0-31.0 | 21.0-25.0 | 15.0-18.0 | 18.0-21.0 | 19.0-21.5 | 19.0-21.5 | |
| Fe | ≦1.0 | ≦1.0 | Bal | Bal | Bal | 2.0-3.0 | – | |
| Al1.0-1.7 Ti 0.3-0.5 | Al2.7-3.2 Mn0.5-1.5 | Al2.7-3.2 Cu2.0-3.0 Mn0.5-1.5 | ||||||
| Max operating temp(°C) | 1200 | 1250 | 1150 | 1150 | 1100 | 300 | 400 | |
| Resisivity(Ω/cmf,20℃) | 1.09 | 1.18 | 1.21 | 1.11 | 1.04 | 1.33 | 1.33 | |
| Resisivity(uΩ/m,60°F) | 655 | 704 | 727 | 668 | 626 | 800 | 800 | |
| Density(g/cm³) | 8.4 | 8.1 | 8.4 | 8.2 | 7.9 | 8.1 | 8.1 | |
| Thermal Conductivity(KJ/m·h·℃) | 60.3 | 45.2 | 45.2 | 45.2 | 43.8 | 46.0 | 46.0 | |
| Linear Expansion Coefficient(×10¯6/℃)20-1000℃) | 18.0 | 17.0 | 17.0 | 17.0 | 19.0 | - | - | |
| Melting Point(℃) | 1400 | 1380 | 1370 | 1390 | 1390 | 1400 | 1400 | |
| Hardness(Hv) | 180 | 185 | 185 | 180 | 180 | 180 | 180 | |
| Tensile Strength(N/mm2 ) | 750 | 875 | 800 | 750 | 750 | 780 | 780 | |
| Elongation(%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | 10-20 | 10-20 | |
| Micrographic Structure | austenite | austenite | austenite | austenite | austenite | austenite | austenite | |
| MagneticProperty | Non | Non | Non | Slightly | Non | Non | Non | |
| Fast Life(h/℃) | ≥81/1200 | ≥50/1250 | ≥81/1200 | ≥81/1200 | ≥81/1200 | - | - | |
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