Tungsten Powder

CAS: 7440-33-7

Purity: 99%-99.999%

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Tungsten Powder is a high-purity material with a uniform particle size distribution and excellent flowability. It features high density, a high melting point, and exceptional corrosion resistance, widely used in electronics, aerospace, metallurgy, and cemented carbide production. As a leading supplier and manufacturer of premium tungsten products, Heeger Materials leverages advanced technology to deliver high-quality tungsten powder for wide ranges of applications.

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Tungsten Powder Data Sheet

Reference:	HMWW1113
Material:	Pure Tungsten
Purity:	99%, 99.9%, 99.95%, 99.99%, 99.999%
Particle Size:	Customized
CAS:	7440-33-7

Tungsten Powder

Tungsten Powder is a grey-black powder with a metallic luster and a melting point as high as 3400°C. It is produced by reducing tungsten trioxide or ammonium paratungstate (APT), with purity influenced by factors such as the reduction temperature, the amount of reducing agent, the movement of the reaction vessel, and the gas flow rate. HM also can provide high-quality Spherical Tungsten Powder with various specifications for additive manufacturing industries.

Tungsten Powder
Tungsten Powder SEM

Tungsten Powder Chemical Composition

W (>%)	Chemical Content (<%)
99.999 W1	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 W2	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 W3	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

Tungsten Powder Particle Size Distribution

Size	Description	Typical Uses
1-10 μm	Ultrafine grade	Additive manufacturing
10-25 μm	Fine grade	Powder injection molding
25-45 μm	Medium grade	Cutting tools
45-150 μm	Coarse grade	Tungsten heavy alloys

Tungsten Powder Physical Properties

Item	Value	Significance
Particle Size	1-150 μm	Smaller sizes improve sintering
Apparent Density	3-4 g/cm3	Indicating compaction properties
Tap Density	9-11 g/cm3	High packing density
Hall Flow Rate	20-25 s/50g	Good flow reduces the risk of powder clogging and jamming.
O Content	<1000 ppm	Affecting ductility and strength

Tungsten Powder Applications

Cemented Carbide: Tungsten Powder is an important raw material for manufacturing cemented carbide.
Electronics: Tungsten Powder is used to manufacture electrical contacts and electrodes in electronic devices.
Aerospace: Tungsten Powder can be used to produce radiation shielding materials.
Powder Metallurgy: Mixed with other metal powders, Tungsten Powder can be used to create a variety of tungsten alloys, such as tungsten-molybdenum alloys, tungsten-rhenium alloys, tungsten-copper alloys, and other high-density tungsten alloys.
Thermal Spraying: Tungsten Powder is used in the thermal spraying process, widely used in the surface treatment of mechanical parts to form wear-resistant and corrosion-resistant coatings.

Tungsten Powder Packaging

The Tungsten Powder is carefully placed in wooden cases or cartons, with additional support from soft materials, to prevent shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.

Tungsten Properties

Item	Value
Atomic number	74
Crystal structure	Body centred cubic
Electronic structure	Xe 4f¹⁴ 5d⁴ 6s²
Valences shown	2,3,4,5,6
Atomic weight( amu )	183.85
Thermal neutron absorption cross-section( Barns )	18.5
Photo-electric work function( eV )	4.55
Natural isotope distribution( Mass No./% )	183/ 14.3
Natural isotope distribution( Mass No./% )	182/ 26.3
Natural isotope distribution( Mass No./% )	186/ 28.6
Natural isotope distribution( Mass No./% )	180/ 0.1
Natural isotope distribution( Mass No./% )	184/ 30.7
Atomic radius – Goldschmidt( nm )	0.141
Ionisation potential( No./eV )	1/ 7.98
Ionisation potential( No./eV )	2/ 17.7

Item	Value
Material condition	Annealed (Soft)
Material condition	Un-annealed (Hard)
Poisson’s ratio	0.28
Poisson’s ratio	0.28
Bulk modulus( GPa )	311
Bulk modulus( GPa )	311
Tensile modulus( GPa )	411
Tensile modulus( GPa )	411
Hardness – Vickers( kgf mm⁻² )	360
Hardness – Vickers( kgf mm⁻² )	500
Tensile strength( MPa )	550-620
Tensile strength( MPa )	1920
Yield strength( MPa )	550

Item	Value
Electrical resistivity( µOhmcm )	5.4@20@20°C
Superconductivity critical temperature( K )	0.0154
Temperature coefficient( K⁻¹ )	0.0048@0-100°C
Thermal emf against Pt (cold 0C – hot 100C)( mV )	1.12

Item	Value
Boiling point( °C )	5660
Density( gcm⁻³ )	19.3@20°C

Item	Value
Melting point( °C )	3410
Latent heat of evaporation( J g⁻¹ )	4009
Latent heat of fusion( J g⁻¹ )	192
Specific heat( J K⁻¹ kg⁻¹ )	133@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	173@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	4.5@0-100°C

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SAFETY DATA SHEET (SDS) – Tungsten Powder

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To customize your tungsten powder, please provide the following details:

Purity
Particle Size
Quantity of the powder you need
Applications (We can also make recommendations based on your specific needs.）

Once we have these details, we can provide you with a quote within 24 hours.

We carry a wide variety of tungsten and tungsten alloy products in stock, and for these, there is generally no minimum order requirement. However, for custom orders, we typically set a minimum order value of $200. The lead time for stock items is usually 1-2 weeks, while custom orders usually take 3-4 weeks, depending on the specifics of the order.

DFARS (Defense Federal Acquisition Regulation Supplement) compliance is primarily concerned with the sourcing of materials for defense-related applications in the United States. According to DFARS, certain materials used in defense must be sourced from the United States or qualifying countries.

If you have specific tungsten materials that are subject to DFARS, please let us know in advance and we will confirm.

At Heeger Materials Inc., we take this responsibility seriously. We adhere to all applicable laws and regulations, including Section 1502 of the Dodd-Frank Act. Our company operates with a strict code of ethics and is committed to only partnering with suppliers who share our dedication to responsible sourcing. We support the initiatives and programs aimed at promoting “conflict-free” supply chains and work diligently to ensure that our products meet these standards.

Heeger Materials Inc., established in 2016 in Colorado, USA, is a specialized supplier and manufacturer of tungsten and tungsten alloys. With extensive expertise in supply and export, we offer competitive pricing and customized solutions tailored to specific requirements, ensuring outstanding quality and customer satisfaction. As a professional provider of refractory metals, specialty alloys, spherical powders, and various advanced materials, we serve the research, development, and large-scale industrial production needs of the scientific and industrial sectors.

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