Grade: C70 Density: 13.1 Hardness :86-87 Uses: dedicated to punching silicon steel, cold heading die tungsten copper, tungsten, silver material is mainly used as high and low voltage electrical switch contacts and contacts can also be used for other electrical processing , vacuum and high temperature of the mold material. Fifties and sixties, the United States and other high-temperature tungsten silver material as solid fuel rocket nozzle throat and missile nose cones, etc. Research has shown that when the high temperature air flow through the tungsten silver material, the material contained in the tissue will be vaporized volatile silver, absorb a lot of heat, which in turn has a cooling effect, protecting the left of tungsten skeleton. This is called "spontaneous sweat cooling" mechanism. In this way, you can make use of tungsten silver material temperatures above 3000 ℃.