Knowledge of Tungsten Bar III

Surface state of tungsten bar:
Any oxidation, contamination, and severe excessive fusion, bubbling, delamination, or crack is not allowed for product W1. Camber should be no more than 10mm. Any excessive fusion, bubble, delamination, crack, surface bulky crystallization or severe oxidation &contamination are not allowed for products W2 and W3. The length of the spalls should not be more than 8mm, width no more than 3mm, depth no more than 1mm; The diameter of mechanical pitting should not be more than 1mm, depth no more than 0.5mm; Camber should be no more than 4mm. Any oxidation or contamination is not allowed for product w4. The cartridge of the vertical sintering part should be cut off, and the section is not allowed to be loose or intermingled.

Physical property of tungsten bar:
The density for W2, W3 tungsten bars is more than 17.5g/cm3. Measured data for the section grain size of W2, W3 can be provided.


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