Hợp kim cứng WCTiC15Co6 chứa:

6% Co, 15% TaC, 79%WC

6%Co, 15%C, 1%Ti, 1%C, 1%W

6%Co, 15%C, 1%Ti, 1%C, 80%W

6% Co, 15%TiC. 79%WC