OhmAlloy104B
(Common Name: Ni30Cr20,Nikrothal 30, N3, HAI-NiCr 30, Resistohm
30,30-20 Ni-Cr,Nikrothal 3.)
OhmAlloy104B 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 OhmAlloy104B are used in olid hot
plates,open coil heaters in HVAC systems,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,floor heaters and resistors.
Normal composition%
| C | P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| Max |
| 0.08 | 0.02 | 0.015 | 1.00 | 1.0~2.0 | 18.0~21.0 | 30.0~34.0 | - | 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 | 20℃ |
| J/gK | 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 | 1.023 | 1.052 | 1.079 | 1.103 | 1.125 | 1.141 |
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ | 1200℃ | 1300℃ |
| 1.158 | 1.173 | 1.187 | 1.201 | 1.214 | 1.226 | - |
Style of supply
| Alloys Name | Type | Dimension |
| OhmAlloy104BW | Wire | D=0.03mm~8mm |
| OhmAlloy104BR | Ribbon | W=0.4~40 | T=0.03~2.9mm |
| OhmAlloy104BS | Strip | W=8~250mm | T=0.1~3.0 |
| OhmAlloy104BF | Foil | W=6~120mm | T=0.003~0.1 |
| OhmAlloy104BB | Bar | Dia=8~100mm | L=50~1000 |
