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Tungsten Heavy Alloys are materials with a high tungsten content and low amounts of Ni, Fe or Ni, Cu. Some tungsten alloy is added Co, Mo or Cr etc. Their densities could be as high as 16.8~18.8g/cc.
Advantages:
High density
Good machinability
Good mechanical properties
High modulus of elasticity
High absorption capacity against χ-rays and γ-rays
Harmless to the health and environment.
Applications:
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
Product Standard: ASTM B 777-07
| two series of Tungsten Heavy Alloys: W-Ni-Fe(magnetic) and W-Ni-Cu(nonmagnetic). |
Chemical Composition, Physical & Mechanical Properties of Tungsten Base, High Density Metal:
| Class | Nominal Tungsten | Density | Hardness | Tensile Strength | Elongation |
| Weight% | g/cm3 | Rockwell C | MPa | % | |
| 1 | 90 | 16.85~17.25 | 24~32 | 700~1200(600~800) | 20~33(4~8) |
| 2 | 92.5 | 17.15~17.85 | 25~30 | 700~1400(500~600) | 15~25(3~5) |
| 3 | 95 | 17.75~18.35 | 25~35 | 700~1200 | 8~15 |
| 4 | 97 | 18.25~18.85 | 30~35 | 600~1000 | 8~14 |
| Density g/cm 3 | TRSN/ mm 2 | Elogation % | Elastic modulus kgf/ mm 2 | HRC |
| 16.8-18.5 | 650-950 | 3-16 | 2800-3300 | 25-31 |
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