Ohmalloy Material Co.,Ltdis a high-tech enterprise which specialized in making all kinds of
alloy such as high resistance alloy, low-resistance copper nickel
alloy, precision alloy, FeCrAl alloy and thermocouple Alloy.
Ohmalloy Material Co.,Ltd have a full production line from melting, surface cleaning,
rolling and slitting, full set of testing machine and can meet all
kinds of technical requirement from customer. Our product is widely
used in heating equipment, big steel mill, mineral, electrical
equipment, food machinery, auto industry, aerospace industry. Our
product not only is popular in domestic market, but also been
exported to all over the world.
Normal composition
| Ni | 78.5~80.0 | Fe | Bal. | Mn | 0.6~1.1 | Si | 0.3~0.5 |
| Mo | 3.8~4.1 | Cu | ≤0.2 | | | | |
| C | ≤0.03 | P | ≤0.02 | S | ≤0.02 | | |
Typical Mechanical properties
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 980 | 1030 | 3~50 |
Typical Physical propertie
| Density (g/cm3) | 8.6 |
| Electrical resistivity at 20℃(Ωmm2/m) | 0.55 |
| Coefficient of linear expansion(20℃~200℃)X10-6/℃ | 10.3~11.5 |
| Saturation magnetostriction coefficient λθ/ 10-6 | 2.0 |
| Curie point Tc/ ℃ | 450 |
The magnetic properties of alloys with high permeability in weak
fields |
| 1J79 | Initial permeability | Maximum permeability | Coercivity | Saturation magnetic induction intensity |
Сold-rolled strip/ sheet. Thickness, mm | μ0.08/ (mH/m) | μm/ (mH/m) | Hc/ (A/m) | BS/ T |
| ≥ | ≤ |
| 0.01 mm | 17.5 | 87.5 | 5.6 | 0.75 |
| 0.1~0.19 mm | 25.0 | 162.5 | 2.4 |
| 0.2~0.34 mm | 28.0 | 225.0 | 1.6 |
| 0.35~1.0 mm | 30.0 | 250.0 | 1.6 |
| 1.1~2.5 mm | 27.5 | 225.0 | 1.6 |
| 2.6~3.0 mm | 26.3 | 187.5 | 2.0 |
| cold drawn wire | |
| 0.1 mm | 6.3 | 50 | 6.4 |
| Bar | |
| 8-100 mm | 25 | 100 | 3.2 |
| Mode of heat treatment 1J79 |
| Annealing media | Vacuum with a residual pressure not higher than 0.1Pa, hydrogen
with a dew point of not higher than minus 40 ℃. |
| The heating temperature and rate | 1100~1150℃ |
| Holding time | 3~6 |
| Cooling rate | With 100 ~ 200 ℃/ h cooled to 600 ℃, rapidly cooled to 300℃ |
Style of supply
| Alloys Name | Type | Dimension |
| OhmAlloy-1J79 | Wire | D= 0.1~8mm |
| OhmAlloy-1J79 | Strip | W= 8~390mm | T= 0.3mm |
| OhmAlloy-1J79 | Foil | W= 10~100mm | T= 0.01~0.1 |
| OhmAlloy-1J79 | Bar | Dia= 8~100mm | L= 50~1000 |
