Super Chatter Free
Superior Performance to Tungsten Carbide Boring Bars and Grinding Quills
Super Chatter Free™ is a tungsten-based material developed as an alternative to tungsten carbide boring bars and grinding quills. It replaces tungsten carbide in most boring and grinding applications and in many instances, provides superior performance.
Advantages of Super Chatter Free:
- Machines similarly to gray cast iron, thus reducing finishing and machining costs
- Not subject to the same chipping and breakage as tungsten carbide
- Stiffness and rigidity is close to that of tungsten carbide
- Extension ratios of up to 10:1 are possible, depending on diameter
- Higher density than tungsten carbide—17.7 gm/cc, compared with 15 gm/cc
| Tungsten Content | 93%W | Proportional Elastic Limit (PSI) | 60,000 |
| Density Gms/cc | 17.7 | ||
| Density Lbs/cu.in | 0.639 | ||
| Hardness Rockwell C | 30 | Modulus of Elasticity (PSI) | 53 x 106 |
| Ultimate Tensile Strength (PSI) | 130,000 | Coefficient of Thermal Expansion (x 10-6/°C at 20° - 400°C) |
4.5 |
| Yield Strength .2% offset (PSI) | 90,000 | Thermal Conductivity
(CGS Units) Electrical Conductivity |
0.27 |
| Elongation (% in 1") | 10 | (% IACS) | 14 |
Availability: Stock size diameters in 8" and 12" lengths. Other shapes and forms can be manufactured to specific requirements.
Super Chatter Free Information Sheet 
