material characteristics are affected by the variation of the sintering time as the sintering time gets longer at the same temperature the tenacity becomes higher namely a tensile strength value increases but a compression yield strength value decreases specifically a stress strain graph is curved in the second and third embodiments of the present invention the compression yield strength increases if the sintering temperature or time decreases fig1 a illustrates a picture of splinter pieces after a compression test of a disclosed material w u2014 cu and fig1 b illustrates a picture of splinter pieces after a compression test of a material 93 1w 1 1ni 1 3fe 4 5mo of the present invention the material according to the present invention demanded in view of function prefers to be low in tensile strength yet the material should be stable against the pressure of propellant inside a barrel when fired the tensile strength is at least 47 0 kg mm 2 and the compression yield strength is about 90 kg mm 2 it is confirmed that the optimum conditions of the sintering temperature and time are max 1 410 u00b0 c and approximately two hours respectively a test of splinter diffusing penetration performance is carried out on a tungsten heavy alloy according to the present invention when an optimum composition ratio of a raw material powder and the micro structure and physical mechanical properties of a pellet in the tungsten heavy alloy according to the embodiment of the present invention are.