Tungsten Nickel Iron W-Ni-Fe Alloy
Tungsten-nickel-iron alloy is a kind of alloy based on tungsten (about 90-98%) and adding nickel, iron, copper or other components, the specific gravity is generally 17.0-18.5.
Description
Tungsten-nickel-iron alloys are an important type of tungsten-based heavy alloy. They are alloys formed by adding nickel and iron to tungsten, and alloys to which other metal elements are added. The ratio of nickel to iron added is generally 7:3 or 1:1 .
Products Description
Specifications of Tungsten Nickel Iron Alloy (W-Ni-Fe Alloy):
| ASTM B777-15 | Non-magnetic Class 1 |
Non-magnetic Class 2 |
Non-magnetic Class 3 |
Magnetic Class 1 |
Magnetic Class 2 |
Magnetic Class 3 |
Magnetic Class 4 |
| AMS 7725E | Type 1 Class 1 |
Type 1 Class 2 |
Type 1 Class 3 |
Type 2 Class 1 |
Type 2 Class 2 |
Type 2 Class 3 |
Type 2 Class 4 |
| MIL-T-21014 Rev D | Class 1 | Class 2 | Class 3 | Class 1 | Class 2 | Class 3 | Class 4 |
| SAE-AMS-T-21014 | Class 1 | Class 2 | Class 3 | Class 1 | Class 2 | Class 3 | Class 4 |
| Tungsten (wt%) | 90 | 93 | 95 | 90 | 92.5 | 95 | 97 |
| Binder | Ni/Cu | Ni/Cu | Ni/Cu | Ni/Fe | Ni/Fe | Ni/Fe | Ni/Fe |
| g/cm3 | 17.10 | 17.60 | 17.90 | 17.10 | 17.50 | 18.10 | 18.50 |
| lb/in3 | 0.62 | 0.64 | 0.65 | 0.62 | 0.63 | 0.65 | 0.67 |
| Hardness, HRC | 24 | 24 | 24 | 27 | 24 | 24 | 25 |
| Mpa | 675 | 650 | 680 | 645 | 645 | 660 | 660 |
| ksi | 100 | 95 | 100 | 95 | 95 | 95 | 95 |
| Mpa | 805 | 830 | 805 | 875 | 900 | 910 | 915 |
| ksi | 116 | 120 | 116 | 126 | 130 | 131 | 132 |
Tungsten-nickel-iron alloy is characterized by high sintered density, good strength and plasticity, and some ferromagnetism. It has good plasticity and machinability, good thermal and electrical conductivity, and excellent absorption of γ-rays or X-rays.
(1) Specific gravity: general specific gravity of 16.5-18.75g/cm3;
(2) High strength: tensile strength of 700-1000Mpa;
(3) High ray absorption capacity: 30-40% higher than lead;
(4) High thermal conductivity: the thermal conductivity of tungsten alloy is 5 times that of mold steel;
(5) Small coefficient of thermal expansion: only 1/2-1/3 of iron or steel;
(6) Good conductivity; widely used in lighting and welding industry because of its good conductivity;
(7) Good weldability and processability.
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