Pure Tungsten Bar

Appearance : Silver gray metallic luster .
Grade : W-1 W-2 W-3 W-4
Density：≥17.0g /cm3
Main application : W-1 is used for making the pole , wire drawing , or doing steel-making additive . W-4 is used as the steel-making additives .
The impurity content accords with GB3459-82

Grade		W-1	W-2	W-3	W-4
The impurity Content is not more than %	Pb	--	--	--	0.001
	Bi	--	--	--	0.001
	Sn	--	--	--	0.001
	Sb	--	--	--	0.001
	As	--	--	--	0.002
	Fe	0.005	0.005	0.010	0.05
	Ni	0.003	0.003	0.005	0.30
	Al	0.002	0.002	0.005	0.005
	Si	0.003	0.003	0.010	0.010
	Ca	0.003	0.003	0.005	0.005
	Mg	0.002	0.002	0.005	0.010
	Mo	0.010	0.010	0.20	0.20
	P	0.001	0.001	0.002	0.005
	C	0.005	0.008	0.010	0.010
	O	0.003	0.003	0.005	0.010
	N	0.003	0.003	--	--

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