Tungsten Heavy Metal Boring Bar
Description
Tungsten heavy metal boring bars, also known as tungsten boring bars, tungsten chatter free boring bars, are manufactured in sintered or polished alloys of 90%-95% tungsten. These alloys are very similar to tungsten-carbides but the chemical composition is developed differently to reduce embrittlement. The high density (twice as heavy as steel) and tensile strength (110 kpsi) of this alloy makes the ideal combination for chatter free tools and supper chatter free tools.
Application
Tungsten heavy metal boring bars greatly enhance boring application by absorbing vibration and drastically reduce chatter, enabling to machine deeper bores with greater precision and finish.
We also offer tungsten heavy metal tool holder with tungsten content over 90%. It is widely used for boring bars, grinding mandrels, tool shafts and all types of precision tool that require vibration-damping to ensure smooth running.
Performance of Tungsten Heavy Metal Boring Bar
| Tungsten Heavy Metal Grade Chart | |||||||
| MIL-T-21014 Rev D | Class 1 | Class 2 | Class 3 | Class 4 | Class 1 | Class 2 | Class 3 |
| SAE-AMS-T-21014 | Class 1 | Class 2 | Class 3 | Class 4 | Class 1 | Class 2 | Class 3 |
| ASTM B777-07 | Class 1 | Class 2 | Class 3 | Class 4 | Class 1 | Class 2 | Class 3 |
| AMS 7725 C | 7725 C | 7725 C | |||||
| Matrix (wt. %) | 90.0% W | 92.5% W | 95.0% W | 97.0% W | 90.0% W | 92.5% W | 95.0% W |
| Binder (wt. %) | 10.0% Ni-Fe | 7.5% Ni-Fe | 5.0% Ni-Fe | 3.0% Ni-Fe | 10.0% Ni-Cu | 7.5% Ni-Fe | 5.0% Ni-Cu |
| Nominal Density (g/cm3) | 16.85-17.25 | 17.15-17.85 | 17.75-18.35 | 18.25-18.85 | 16.85-17.25 | 17.15-17.85 | 17.75-18.35 |
| Nominal Density (lb/in3) | 0.614 | 0.632 | 0.650 | 0.668 | 0.614 | 0.632 | 0.650 |
| Typical Hardness (Rc) | 26 | 26 | 28 | 30 | 26 | 26 | 28 |
| Ultimate Tensile Strength - Min. (psi) | 110,000 | 110,000 | 105,000 | 100,000 | 94,000 | 110,000 | 94,000 |
| 0.2% Offset Yield Strength - Min. (psi) | 75,000 | 75,000 | 75,000 | 75,000 | 75,000 | 75,000 | 75,000 |
| Magnetic Characteristics | Slightly magnetic | Slightly magnetic | Slightly magnetic | Slightly magnetic | Nonmagnetic | Nonmagnetic | Nonmagnetic |
Package and Transportation
We pack tungsten heavy metal boring bars in plywood case and send them by ocean or air.
Founded in 2008, Shanghai TallKee Refractory metals specializes in manufacturing tungsten heavy metal boring bars (tungsten boring bars). Due to mature manufacturing technique and effective quality control, our products are stable in quality, and now are for sale. For more information, please feel free to contact us.
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