... the matrix (W content 85-99%), and add a Ni, Cu, Co, Mo, Cr alloy elements. The alloy composition ... uses into W-Ni-Fe, Ni-Cu-W, W-Co, WC-Cu-W, W-Ag, and other major series ... /cm3, was called the world a high proportion alloy, which also features a series of outstanding features, than major ... iron or steel, electrical properties can be good; a good solderability and machining. Given the high proportion of ...