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Description

High melting point (3410°C)

Low thermal expansion

High electrical resistance

Low vapour pressure

Good thermal conductivity

High density

Atomic number	74
CAS number	7440-33-7
Atomic mass	183.84 [g/mol]
Melting point	3420 °C
Boiling point	5555 °C
Density at 20 °C	19.25 [g/cm³]
Crystal structure	Body-centered cubic
Coefficient of linear thermal expansion at 20 °C	4.4 × 10^-6[m/(mK)]
Thermal conductivity at 20 °C	164 [W/(mK)]
Specific heat at 20 °C	0.13 [J/(gK)]
Electrical conductivity at 20 °C	18.2 × 10⁶[S/m]
Specific electrical resistance at 20 °C	0.055 [(Ωmm²)/m]

1.Material: tungsten
2.Purity:>=99.95%
3.Dia: 0.8mm Min

4.Surface: black,sintering,polishing,machining

Chemical Composition

Element	Mo	Mg	Fe	C	Al	N	Si	Ca	Ni	C
Concentration(%)	0.01	0.003	0.005	0.005	0.002	0.003	0.005	0.005	0.003	0.008
Purity(Metallic Base) W≥99.95%

Parameters

Wholesale customized 99.95 % pure tungsten bars

Machining	Diameter	Diameter tolerance %	Max length, mm
Forging, Rotary swaging	1.6-20	±0.1	2000
	20-30	±0.1	1200
	30-60	±0.1	1000
	60-70	±0.2	800

Note: Your special request for wholesale customized 99.95 % pure tungsten bars will be available.

Quality&Inspection

Applications

Parts of electric light source and elctron tube
Heat elements of high temperature furnace
Structures of high temperature furnace
Contact of electrical appliance
Rare earth industry
Vacuum coating industry

Keywords

Metal material