Furnace Heating elements made by Ni80Cr20 acid washing strip
(Common Name: Ni80Cr20, Nikrothal 8, MWS-650, NiCrA, Tophet A,
HAI-NiCr 80, Chromel A, Alloy A, Alloy 650, N8, Resistohm 80,
Stablohm 650, Nichorme V, Nikrothal 80.)
OhmAlloy109 is a nickel-chromium alloy (NiCr alloy) characterized
by high resistivity, good oxidation resistance and very good form
stability. It is suitable for use at temperatures up to 1200°C, and
hold a superior service life compared to Iron chromium aluminum
alloys.
Typical applications for OhmAlloy109 are electric heating elements
in home appliances, Industrial furnaces and resistors (wirewound
resistors, metal film resistors), flat irons, ironing machines,
water heaters, plastic moulding dies, soldering irons, metal
sheathed tubular elements and cartridge elements.
Normal composition%
| C | P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| Max |
| 0.03 | 0.02 | 0.015 | 0.60 | 0.75~1.60 | 20.0~23.0 | Bal. | Max 0.50 | Max 1.0 | - |
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 420 | 810 | 30 |
Typical Physical properties
| Density (g/cm3) | 8.4 |
| Electrical resistivity at 20℃(Ωmm2/m) | 1.09 |
| Conductivity coefficient at 20℃ (WmK) | 15 |
| Coefficient of thermal expansion |
| Temperature | Coefficient of Thermal Expansion x10-6/℃ |
| 20 ℃- 1000℃ | 18 |
| Specific heat capacity |
| Temperature | 20℃ |
| J/gK | 0.46 |
| Melting point (℃) | 1400 |
| Max continuous operating temperature in air (℃) | 1200 |
| Magnetic properties | non-magnetic |
| Temperature Factors of Electrical Resistivity |
| 20℃ | 100℃ | 200℃ | 300℃ | 400℃ | 600℃ |
| 1 | 1.006 | 1.012 | 1.018 | 1.025 | 1.018 |
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ | 1300℃ |
| 1.01 | 1.008 | 1.01 | 1.014 | 1.021 | - |
Style of supply
| Alloys Name | Type | Dimension |
| OhmAlloy109W | Wire | D=0.03mm~8mm |
| OhmAlloy109R | Ribbon | W=0.4~40 | T=0.03~2.9mm |
| OhmAlloy109S | Strip | W=8~250mm | T=0.1~3.0 |
| OhmAlloy109F | Foil | W=6~120mm | T=0.003~0.1 |
| OhmAlloy109B | Bar | Dia=8~100mm | L=50~1000 |
