Composite rods for reinforcement of drilling tools.

WFM Composite Rods – are crushed solid alloy of a certain fractional composition, which is filled with brass solder. These rods are used for reinforcement of the drilling tool for well workover and downhole drilling system.

Below are the technical data of composite rods for reinforcing drilling tools.

Melting temperature	Hardness	Yield strength	Tensile strength	Relative elongation	Operating temperature
890-915℃	160HB	270-280Pa	580-600MPa	27-29%	до 300℃

Type	Hardness	Flexural strength
tungsten-cobalt (TC)	87-90HRA	1300-1800MPа

Weight	Length	Mass ratio (hard alloy / wel.alloy), %
0,4 kg	450mm	70/30

Classification on size of the hard alloy crumb:

0,4-1,6 mm (1/64′-1/16′)
1,6-3,2 mm (1/16′-1/8′)
3,2-4,8 mm (1/8′-3/16′)
4,8-6,4 mm (3/16′-1/4′)
6,35-8,0 mm (1/4′-5/16′)
8,0-9,5 mm (5/16′-3/8′)

Example of marking: Composite rod WFM 70/30 1,6-3,2мм (1/16′-1/8′), арт. WFM70301632. Country of Origin: Чехія.