Durakut

Electrical Discharge Machining and Electrochemical Machining

Hogen Industries' Durakut tungsten composites are used worldwide for electrical discharge machining (EDM) and electrochemical machining (ECM) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin powders are used, resulting in a consistent, homogenous material giving high, even burning rates.  Copper tungsten is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.

Hogen’s Durakut H5W (68% tungsten & 32% copper) is most commonly used for EDM electrodes. There are circumstances that require material with higher tungsten content. In these instances, Durakut H10W (75% tungsten & 25% copper) and Durakut H30W (80% tungsten & 20% copper) are used. The use of these materials results in sharper detail and superior surface finish. Typically as the tungsten percentage decreases, the result is a faster burning rate and some loss of definition and finish. Often it’s a trade-off because the higher percentage tungsten materials are slightly more costly.

These tungsten composites are readily machinable. Carbide tooling is recommended.

There are some applications where silver is used as EDM electrodes. Hogen’s
H20S (74% tungsten & 26% silver) is the most commonly used.

For ECM electrodes, H 10 W is the standard because of its thermal and electrical characteristics and ability to withstand erosion.

Availability: Diameters stocked in 8"and 12" lengths. Other shapes and forms can be manufactured to specifications.

Hogen
Durakut
Grade		 Nominal
Composition
% Weight		 Rockwell
Hardness		 Electrical
Conductivity
% IACS		 Ultimate
Tensile
Strength
PSI		 Cross
Breaking
Strength
PSI		 Density
GMS/CC
H5W 68% Tungsten &
32% Copper		 88 B 52 75,000 130,000 13.93
H10W 75% Tungsten &
25% Copper		 94 B 48 90,000 150,000 14.7
H30W 80% Tungsten &
20% Copper		 98 B 44 96,000 170,000 15.56
H20S 74% Tungsten & 26% Silver 90 B 47 ---- ---- 15.5