Property	Deep or bright grey powder
Particle Size	2 ~ 5micron, 4 ~ 6micron
Bulk Density	2.5 ~ 3.0 g/cc
Packing	50kg/iron barrel
Composition	W≥99.9	AL<0.001	C<0.005	Pb<0.001	Na<0.002	Sb<0.001
	Mo<0.008	Mg<0.002	K<0.002	Si<0.003	Ca<0.002	P<0.001
	Fe<0.005	Sn<0.0001	Bi<0.0001	Cu<0.001	Ni<0.003	As<0.002