Description: Tungsten needle, made of pure tungsten with bright and smooth surface, is brittle and hard, but can be worked by forging, drawing, extruding or sintering.
tungsten needle (1) tungsten alloy needle (1) tungsten carbide needle (1)
Pure tungsten needle is needle made of the material of pure tungsten, which is a very hard and steel-gray metal that is brittle and hard to work. However, if made pure enough, although tungsten retains its hardness (which exceeds that of many steels), tungsten needle becomes malleable enough that it can be worked easily. Tungsten needle can be worked by forging, drawing, extruding or sintering.
Tungsten alloy needle is tungsten needle made of tungsten alloy, such as 90WNiFe and 90WNiFe. The hardness of tungsten alloy is much less than pure tungsten and tungsten carbide, so that tungsten alloy needle can be moulded and processed easily. Therefore, the tungsten alloy needle is not as brittle as pure tungsten needle, and is not as hard as tungsten carbide needle.
Tungsten carbide needle is tungsten needle made of the material of tungsten carbide. Tungsten carbide needle owns high hardness, which is around 90 hrc. Since the tungsten carbide needle is the hardest in these three needles, so the tungsten carbide needle can be used to the industries, which needs the tungsten needle to penetrate hard material.
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