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Ohmalloy Material Co.,Ltd
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0.7mm Nickel Iron Alloy Soft Condition For Temperature Adjusting Element
| Place of Origin: | Zhejiang, China (Mainland) |
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Product Detail
0.7mm Nickel Iron Alloy Soft Condition For Temperature Adjusting Element
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0.7mm Nickel Iron Alloy Soft Condition For Temperature Adjusting Element
OhmAlloy-4J36 (Expansion alloy)
(Common Name: Invar, FeNi36, Invar Standard, Vacodil36)
OhmAlloy-4J36 (Invar), also known generically as FeNi36 (64FeNi in the US), is a nickel–iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or α).
OhmAlloy-4J36 (Invar) is used where high dimensional stability is required, such as precision instruments, clocks, seismic creep gauges, television shadow-mask frames, valves in motors, and antimagnetic watches. In land surveying, when first-order (high-precision) elevation leveling is to be performed, the Level staff (leveling rod) used is made of Invar, instead of wood, fiberglass, or other metals. Invar struts were used in some pistons to limit their thermal expansion inside their cylinders.
Ohmalloy 4J36 Bright Strip 0.7mm for Temperature adjusting element
OhmAlloy-4J36 use oxyacetylene welding, electric arc welding, welding and other welding methods. Since the coefficient of expansion and chemical composition of the alloy is related should be avoided due to welding causes a change in the alloy composition, it is preferable to use Argon arc welding welding filler metals preferably contains 0.5% to 1.5% titanium, in order to reduce weld porosity and crack.
Normal composition%
| Ni | 35~37.0 | Fe | Bal. | Co | - | Si | ≤0.3 |
| Mo | - | Cu | - | Cr | - | Mn | 0.2~0.6 |
| C | ≤0.05 | P | ≤0.02 | S | ≤0.02 |
Coefficient of expansion
| θ/ | α1/10-6-1 | θ/ | α1/10-6-1 |
| 20~-60 | 1.8 | 20~250 | 3.6 |
| 20~-40 | 1.8 | 20~300 | 5.2 |
| 20~-20 | 1.6 | 20~350 | 6.5 |
| 20~-0 | 1.6 | 20~400 | 7.8 |
| 20~50 | 1.1 | 20~450 | 8.9 |
| 20~100 | 1.4 | 20~500 | 9.7 |
| 20~150 | 1.9 | 20~550 | 10.4 |
| 20~200 | 2.5 | 20~600 | 11.0 |
Typical Physical properties
| Density (g/cm3) | 8.1 |
| Electrical resistivity at 20(mm2/m) | 0.78 |
| Temperature factor of resistivity(20~200)X10-6/ | 3.7~3.9 |
| Thermal conductivity, λ/ W/(m*) | 11 |
| Curie point Tc/ | 230 |
| Elastic Modulus, E/ Gpa | 144 |
Typical Mechanical properties
| Tensile Strength | Elongation |
| Mpa | % |
| 641 | 14 |
| 689 | 9 |
| 731 | 8 |
Temperature factor of resistivity
| Temperature range, | 20~50 | 20~100 | 20~200 | 20~300 | 20~400 |
| aR/ 103 * | 1.8 | 1.7 | 1.4 | 1.2 | 1.0 |
| The heat treatment process | |
| Annealing for stress relief | Heated to 530~550 and hold 1~2 h. Cold down |
| annealing | In order to eliminate hardening, which be bring out in cold-rolled, cold drawing process. Annealing needs heated to 830~880 in vacuum,hold 30 min. |
| The stabilization process |
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| Precautions |
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Style of supply
