EMT 909, is a medium grain size grade grade, with a balance of shock resistance/toughness and the wear resistance. EMT 909 is a homogenous mixture of tungsten carbide grains in a tough cobalt binder matrix. The carbide grains are fused into a solid matrix of cobalt metals. The metal carbide’s grains are “cemented” in the binder metal’s matrix. Information provided by Extramet |