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Tungsten Carbide Balls (Cobalt Binder)

Tungsten Carbide Balls (Cobalt Binder)

Tungsten Carbide was originally developed for cutting tools, because it's extremely hard; it has great compressive strength and is three time more rigid than steel.


These balls are characterised by high hardness, dimensional stability, high wear resistance and the ability to withstand significant levels of shock and impact. Although the Cobalt binder may corrode on contact with water, this is largely cosmetic and doesn't affect the overall performance.

Use Cases

You'll find them in ball screws, check valves, flow meters (for example gas meters) gauging and checking instruments as well as ballpoint pens.

International Equivalents

AISI 1010, JIS SWRM 12, EN32 ASTM A/29, Wks 1.0010

Tungsten Carbide93 - 100%
Cobalt5 - 7 %
Size Range
1.588mm (1/16") to 50.800mm (2")
Hra90.5 - 91.5
Mechanical Properties
Density14.947 - 15.0% g/cm3
Thermal Conductivity100 W/m/oC
Electrical Resistivity20 u ohms/cm
Linear Expansion Coefficient 20 - 400oC4.9 10-6/oC
Linear Expansion Coefficient 20 - 800oC5.3 10-6/oC
Transverse Rupture Strength @ 20oC2600 N/mm2
Fracture Toughness K c @ 20oC12 MN/m2
Compressive Strength @ 20oC6200 N/mm2
Poisson's Ratio0.22
Magnetic PropertiesSlightly magnetic
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Our Quality Guarantee

Accuracy is our trademark at TN UK. We pride ourselves on our ability to measure and calibrate the products we manufacture. Housing some of the most sophisticated equipment in the world, our annually assessed UKAS lab means we guarantee the precision of the products we supply.

On top of that, we maintain regular and open communication directly with you and any relevant departments to ensure that you get exactly what you need when you need it.

We also offer a recalibrate service for your existing gauges, CMM Reference balls and Master Ball Sets. So you can rest assured that, whether we are supplying a new product or recalibrating an existing one, by meeting our strict standards, your company meets its strict standards (particularly important for other calibration assessed companies).



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