Knowledge of Tungsten Bar II

Grade of tungsten bar:
In reference to different chemical components and applying requirement, the grades of products are divided into four categories:W1, W2 ,W3,W4.

Appearance of tungsten bar:
The appearance of tungsten bar turns to be metallically gray or dark gray. Hygroscopy is not allowed on the appearance of W1 ,W2, and W3 tungsten bars.


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