Active Member
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[China]
Address: Building 3, International Enterprises Center, Guanggu Avenue 52#, Wuchang, Wuhan, China
Contact name:Pauline
Hubei Fotma Machinery Co., Ltd. |
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WNiFe Tungsten Heavy Alloy Tungsten Nickle Iron Alloy For Aircraft / Vehicles
The majority of current uses for tungsten
heavy alloys are best satisfied with the W-Ni-Fe system.
Tungsten alloys such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe represent
common compositions. The addition of cobalt to a W-Ni-Fe tungsten
alloy is a common approach for slight enhancement of both strength
and ductility. The presence of cobalt within the tungsten alloy
provides solid-solution strengthening of the binder and slightly
enhanced tungsten-matrix interfacial strength. Cobalt additions of
5 to 15% of the nominal binder weight fraction arc most
common.
Tungsten Nickle Iron Alloy has density range from
17.0g/cm3 to 18.8g/cm3, which is the twice of steel, more than 1.5
times of lead. WNiFe alloy has low thermal expansion
coefficient, high strength and high modulus of elasticity.
Tungsten Nickle Iron Alloy Main Application:
Tungsten alloy damping weights for computer disk drive heads
Balancing weights for ailerons in commercial aircraft, helicopter
rotors, and for guided missiles made by tungsten alloy.
Kinetic energy penetrators for defeating heavy armor by tungsten
alloy
Tungsten alloy Fragmentation warheads
Tungsten alloy Advantages:
-High density
-Excellent mechanical properties such as high vibration-damping
capacity and high Young's modulus.
-Excellent radiation-shielding property
-High thermal conductivity with low thermal expansion
coefficient
-Higher high-temperature strength and thermal shock
resistance
-High oxidation resistance and corrosion resistance
Tungsten Nickle Iron Alloy Data Sheet:
Alloy Type | HD17D 90 W | HD17.5 92.5 W | HD17.6 92.5 W | HD17.7 93 W | HD18D 95 W | HD18.5 97 W |
MIL-T-21014 | Class 1 | Class 1 | - | - | Class 3 | Class 4 |
SAE-AMS-T-21014 | Class 1 | Class 2 | - | - | Class 3 | Class 4 |
AMS 7725 C | 7725 C | -- | -- | -- | -- | -- |
ASTM B777-87 | Class 1 | Class 2 | - | - | Class 3 | Class 4 |
Typical Density | 17.1 | 17.5 | 17.6 | 17.7 | 18 | 18.5 |
Typical Density | 0.614 | 0.632 | 0.636 | 0.639 | 0.65 | 0.668 |
Typical Hardness RC | 25 | 26 | 30 | 32 | 27 | 28 |
Ultimate Tensile Strength Min | 120,000 | 114,000 | 120,000 | 125,000 | 120,000 | 123,000 |
0.2% Offset Yield Strength Min | 88,000 | 84,000 | 90,000 | 95,000 | 90,000 | 85,000 |
Minimum % Elongation | 10 | 7 | 4 | 4 | 7 | 5 |
Proportional Elastic Limit | 52,000 | 46,000 | 55,000 | 60,000 | 44,000 | 45,000 |
Modulus of Elasticity | 45 x 106 | 47 x 106 | 52 x 106 | 53 x 106 | 50 x 106 | 53 x 106 |
Coefficient of Thermal Expansion x10-6/0C | 4.61 | 4.62 | 4.5 | 4.5 | 4.6 | 4.5 |
Thermal Conductivity | 0.18 | 0.2 | 0.27 | 0.27 | 0.26 | 0.3 |
Electrical Conductivity | 10 | 13 | 14 | 14 | 13 | 17 |
Magnetic | Slightly | Slightly | Slightly | Slightly | Slightly | Slightly |
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