development are only a few examples. In recent years new grades like K6UF and the enhanced K55SF have been extremely successful and also have been made extrude-able . In fact... carbide grades K44UF, K55SF and K6UF have established a worldwide benchmark. We continue to meet and exceed the increasing performance demands from the machine-tool industry...

of the KF grades K6UF, K40UF, K44UF, and K55SF. K40UF exhibits an average grain size of .6 m and consists of 10 weight percent cobalt. The grade K44UF is made of .5 m tungsten... carbide powder and contains 12 percent cobalt. While the toughness of both grades is approximately the same, the Vickers hardness of K44UF is 5 percent higher. Our grade K55SF...