Ohmalloy Material Co.,Ltd
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Common Name: Chromel D, Nikrothal 40, N4, HAI-NiCr 40, Tophet D, Resistohm 40, Cronifer Ⅲ,Chromex,35-20 Ni-Cr,Alloy D,NiCr-DAlloy 600,Nikrothal 4,MWS-610,Stablohm 610.
OhmAlloy104A is a nickel-chromium alloy (NiCr alloy) characterized by High resistivity, good oxidation resistance,very good form stability,good ductility and excellent weldability. It is suitable for use at temperatures up to 1100°C.
Typical applications for OhmAlloy104A are used in night-storage heaters,convection heaters,heavy duty rheostats and fan heaters.And also used for heating cables and rope heaters in defrosting and de-icing elements, electric blankets and pads,car seats,baseboard heaters and floor heaters,resistors.
Normal composition(%)
| C | P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| Max | |||||||||
| 0.08 | 0.02 | 0.015 | 1.00 | 1.0~3.0 | 18.0~21.0 | 34.0~37.0 | - | Bal. | - |
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 340 | 675 | 35 |
Typical Physical properties
| Density (g/cm3) | 7.9 |
| Electrical resistivity at 20℃(Ωmm2/m) | 1.04 |
| Conductivity coefficient at 20℃ (WmK) | 13 |
| Coefficient of thermal expansion | |
| Temperature | Coefficient of Thermal Expansion x10-6/℃ |
| 20 ℃- 1000℃ | 19 |
| Specific heat capacity | |
| Temperature | J/gK |
| 20℃ | 0.50 |
| Melting point (℃) | 1390 |
| Max continuous operating temperature in air (℃) | 1100 |
| Magnetic properties | non-magnetic |
Temperature Factors Of Electrical Resistivity
| 20℃ | 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | 600℃ |
| 1 | 1.029 | 1.061 | 1.09 | 1.115 | 1.139 | 1.157 |
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ | 1200℃ | 1300℃ |
| 1.173 | 1.188 | 1.208 | 1.219 | 1.228 | - | - |
Style of supply
| Alloys Name | Type | Dimension | |
| OhmAlloy104AW | Wire | D= 0.03~8mm | |
| OhmAlloy104AR | Ribbon | W= 0.4~40mm | T= 0.03~2.9mm |
| OhmAlloy104AS | Strip | W= 8~250mm | T= 0.1~3.0 |
| OhmAlloy104AF | Foil | W= 6~120mm | T= 0.003~0.1 |
| OhmAlloy104AB | Bar | Dia= 8~100mm | L= 50~1000 |