ASTM Standard Tungsten Heavy Alloy Rods GMW Alloy 1.0mm to 100mm For Balance Rod
Tungsten Heavy Alloys (WHAs) are tungsten alloys that typically contain 90 to 98 wt% W. Most commercial tungsten alloys are two-phase structures, the principal phase being nearly pure tungsten in association with a binder phase containing the transition metals plus dissolved tungsten. As a consequence, WHAs derives their fundamental properties from those of the principal tungsten phase, which provides for both high density and high elastic stiffness. It is these two properties that give rise to must applications for this family of materials.
The current uses of tungsten heavy alloy (WHAs) are spanning a wide range of consumer, industrial, and government applications
Brief Introduction of Tungsten Heavy Alloy Rods:
Code: GMW
Density: (17-18.5) g/cm3
Main Component: W (88-98)% with the addition of nickel and copper or nickel and iron, etc.
Diameter: 1.0mm to 100mm
Length: Max 600mm
Surface Condition: Machined, Ground
Advantages of Tungsten Alloy Rods:
-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
Applications of Tungsten Heavy Alloy:
· Protection shields for nuclear radiation such as PET syringe shield, vial shield, isotope container, FDG container, multi leaf collimator
· Balancing weights such as tungsten sinker bar, heavy metal boring bar, vessels crank camshafts, holders for well logging, racing weights, vibration damping and dynamic balancing weights
· Substitutional material for Uranium
· Electroheat upsetting anvil block
· Balls in bomb
· High voltage electrical contact
· Electrodes for Resistance Welding
Properties of Tungsten Heavy Alloy ( AMS-T-21014 ):
| Class | Nominal tungsten (weight percent) | Density (g/cc) | Hardness ( HRC )(maximum) |
| 1 | 90 | 16.85 - 17.25 | 32 |
| 2 | 92.5 | 17.15– 17.85 | 33 |
| 3 | 95 | 17.75– 18.35 | 34 |
| 4 | 97 | 18.25– 18.85 | 35 |
Mechanical Properties – Minimum Value ( AMS-T-21014 ):
| Class | Ultimate tensile strength ( ksi) | Yield strength at 0.2percent offset (ksi) | Elongation( percent ) |
| 1 | 110 | 75 | 5 |
| 2 | 110 | 75 | 5 |
| 3 | 105 | 75 | 3 |
| 4 | 100 | 75 | 2 |
Copper Tungsten alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.
Tungsten copper (Cu-W) Alloy is the composite of tungsten and copper which own he excellent performance of tungsten and copper. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and aviation.
Main Sizes of Tungsten Copper Alloy Rods:
Diameter: 1 - 100 mm
Length: 50 - 500mm
Diameter Tolerances: +/-0.05mm, +/-0.1mm
Length Tolerances: +/- 0.1mm, +/-0.5mm
Advantages of WCu Alloy Rods:
High thermostability
High arc resistance
High strength
Good electrical conductivity
Lighter weight than pure tungsten
Specifications of Copper Tungsten Alloy:
| Code No. | Chemical Composition % | Mechanical properties |
| CU | Impurity | W | Density
(g/cm3 ) |
Hardness
HB | RES(cm) |
Conductivity
IACS/ % |
TRS/ Mpa |
| CuW(50) | 50+2.0 | 0.5 | Balance | 11.85 | 115 | 3.2 | 54 | |
| CuW(55) | 45+
2.0 | 0.5 | Balance | 12.30 | 125 | 3.5 | 49 | |
| CuW(60) | 40+2.0 | 0.5 | Balance | 12.75 | 140 | 3.7 | 47 | |
| CuW(65) | 35+2.0 | 0.5 | Balance | 13.30 | 155 | 3.9 | 44 | |
| CuW(70) | 30+2.0 | 0.5 | Balance | 13.80 | 175 | 4.1 | 42 | 790 |
| CuW(75) | 25+2.0 | 0.5 | Balance | 14.50 | 195 | 4.5 | 38 | 885 |
| CuW(80) | 20+2.0 | 0.5 | Balance | 15.15 | 220 | 5.0 | 34 | 980 |
| CuW(85) | 15+2.0 | 0.5 | Balance | 15.90 | 240 | 5.7 | 30 | 1080 |
| CuW(90) | 10+2.0 | 0.5 | Balance | 16.75 | 260 | 6.5 | 27 | 1160 |
Customized Tungsten Copper Alloy Tubes / Pipes Surface Machined For Spark Erosion
Tungsten copper tubes are widely used in machinery, electronics, and aviation, aerospace, military and other fields.
Copper Tungsten Alloy uses the excellent metal characteristics of the high pure tungsten powder and the plasticity and high conductivity of the high pure copper powder to produce composite materials with static pressure molding, high temperature sintering and the the solution process of the copper infiltration technology.
These materials have some advantages: the arc ablation resistance, good thermal conductivity, and small thermal expansion, not soften in high temperature, softening, high strength, high density, high hardness etc.
Advantages of Copper Tungsten Tubes:
High arc resistance combined with good electrical conductivity
Low thermal expansion.
Strong hardness(86~93.5HRA)
High thermal conductivity
Applicatioins of Tungsten Copper Alloy:
Copper tungsten is very popular used in the EDM, since it has both tungsten and copper's character so it has very good wear resistance. Our copper tungsten alloy is made by vacuum infiltration technology. which has very good physical and mechanical properties.
Electrodes for Resistance Welding
Arcing contacts and vaccum contacts in high and medium voltage breakers or vaccum interruptors
Electrodes in electric spark erosion cutting machines
Heat sinks as passive cooling elements of electronic devices
For the spark erosion of dies or cemented carbide making for high speed steel and switches and contacts in high and low voltage electrical devices.
Special shape products are produced as per customer's drawing.
Specifications of WCu Alloy Pipes:
| Item | Composition(by wt. ) | Density(g/cm3 ) | Electrical conductivity (% IACS) | Hardness (HRB) |
| 1 | Tungsten: 55%Copper: balance | 12.3 | 49 | 70 |
| 2 | Tungsten: 60%Copper: balance | 12.75 | 47 | 76 |
| 3 | Tungsten: 65%Copper: balance | 13.3 | 44 | 82 |
| 4 | Tungsten:70%Copper: balance | 13.9 | 42 | 88 |
| 5 | Tungsten: 75%Copper: balance | 14.5 | 38 | 94 |
| 6 | Tungsten: 80%Copper: balance | 15.2 | 34 | 98 |
Sizes of Tungsten Tubes:
| Diameter (mm) | Wall thickness (mm) | Length (mm) |
| 30-50 | 2–10 | <1300 |
| 50-100 | 3–15 |
| 100-150 | 3–15 |
| 150-200 | 5–20 |
| 200-300 | 8–20 |
| 300-400 | 8–30 |
| 400-450 | 8–30 |
| 450-500 | 8–30 |
Picture show:
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