Nichrome tube Ni80Cr20 tube for heating elements
A Nichrome tube is a type of heating element made from a
nickel-chromium alloy called nichrome.
Nichrome is a non-magnetic alloy that has high resistance to
electric current and is able to withstand high temperatures.
These properties make it an ideal material for use in heating
applications.
Chemical Composition: 80% nickel, 20% chrome
Resisvity: 1.09 ohm mm2/m,
Hardness: Soft, hard or semi-hard
Characteristics: Stable performance; Anti-oxidation; Corrosion
resistance; High temperature stability; Excellent coil-forming
ability; Uniform and beautiful surface condition without spots.
Usage: Resistance heating elements; Material in metallurgy;
Household appliances; Mechanical manufacturing and other
industries.
We professionally produce nickel-base alloy tape, include Ni80Cr20,
Ni60Cr23, Ni60Cr16, Ni35Cr20, Ni20Cr25, NiMn, Ni200, Karma,
Evanohm, NCHW, etc.
Shanghai Tankii Alloy Material Co., Ltd. supply the main grades as
below:
| Properties/Grade | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
| Main Chemical composition | Ni | Rest | Rest | 55.0-61.0 | 34.0-37.0 | 30.0-34.0 |
| | Cr | 20.0-23.0 | 28.0-31.0 | 15.0-18.0 | 18.0-21.0 | 18.0-21.0 |
| | Fe | ≤ 1.0 | ≤ 1.0 | Rest | Rest | Rest |
| Max. continuous service temp. of element | 1200 | 1250 | 1150 | 1100 | 1100 |
| Resistivity at 20oC (μ Ω · m) | 1.09 | 1.18 | 1.12 | 1.04 | 1.04 |
| Density (g/cm3) | 8.40 | 8.10 | 8.20 | 7.90 | 7.90 |
| Thermal conductivity(KJ/m· h· oC) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| Coefficient of lines expansion(α × 10-6/oC) | 18.0 | 17.0 | 17.0 | 19.0 | 19.0 |
| Melting point (approx. )( oC) | 1400 | 1380 | 1390 | 1390 | 1390 |
| Elongation at rupture (%) | > 20 | > 20 | > 20 | > 20 | > 20 |
| Micrographic structure | austenite | austenite | austenite | austenite | austenite |
| Magnetic properties | nonmagnetic | nonmagnetic | nonmagnetic | nonmagnetic | nonmagnetic |
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