Pure Tungsten

Tungsten, also referred to as Wolfram, is a chemical element with the chemical symbol W and atomic number 74. After Carbon, Tungsten has the highest melting point of all elements. Tungsten is among the heaviest metals found on Earth. It has excellent high temperature mechanical properties, with the lowest expansion coefficient and highest conductivity of all metals.

Chemical components for different purity Tungsten:

W (>%)	Chemical Content (<%)
99.999 PT74-TBSW1	Fe	Ca	Be	Sn	Al	Ni	Zn	Sb	Pt	K	Ta	Na
	0.0001	0.00005	0.000005	0.000005	0.00005	0.00001	0.00005	0.00005	0.00003	0.000005	0.0001	0.00005
	Cr	Pb	As	Mg	Ti	Bi	Mo	Cd	Cu	Ba	Co	Mn
	0.000005	0.00001	0.00005	0.00005	0.000005	0.00001	0.00001	0.000005	0.000007	0.00001	0.000005	0.000005
99.99 PT74-TBSW2	Fe	Ca	Be	Sn	Al	Ni	Zn	Sb	Pt	K	O	Na
	0.0001	0.00045	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0005	0.0040	0.0009
	Cr	Pb	As	Mg	Ti	Bi	Mo	Cd	Cu	Ba	Co	Mn
	0.0001	0.0001	0.0001	0.0001	0.0001	0.0001	0.0002	0.0001	0.0001	0.0001	0.0001	0.0001
99.95 PT74-TBW3	Fe	Ca	P	Sn	Al	Ni	N	Sb	Si	O	Pb	As
	0.005	0.003	0.001	0.0001	0.002	0.003	0.003	0.001	0.003	0.003	0.0001	0.002
	Mg	C	Bi	Mo
	0.002	0.005	0.0001	0.001

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