Tungsten Crucible

Material: Pure Tungsten, Tungsten Heavy Alloy (WNiCu, WNiFe)

Purity: 99%-99.999%

Custom sizes and standard sizes in stock
Quick Lead Time
Competitive Price

Tungsten Crucible is a high-temperature resistant container, which is ideal for sapphire crystal growth and rare earth material melting. It can be used in a vacuum and inert gas environment at a temperatures below 2600 ℃. As a leading supplier and manufacturer of premium tungsten products, Heeger Materials leverages advanced machining centers to deliver high-precision tungsten and tungsten alloy crucibles for wide ranges of applications.

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Tungsten Crucible Data Sheet

Reference:	HMWW1118
Dimensions:	Diameter: 10-500 mm Wall Thickness: 8-20 mm Height: 10-750 mm
Material:	Tungsten and Tungsten Heavy Alloy
Shape:	Cylinder, Square, Rectangular, Tapered, Threaded, or customized according to specific drawings
Purity:	99%, 99.9%, 99.95%, 99.99%, 99.999%
Surface:	Grinding, Finish turning
Temper:	Annealed or Unannealed

Tungsten Crucible

Tungsten Crucibles are high-temperature resistant vessels made of high-purity tungsten material. Additionally, the inclusion of certain rare earth elements in the production of pure tungsten crucibles can enhance their oxidation resistance, thereby extending the product’s service life. They are generally cylindrical in shape, with diameters ranging from 10-500 mm, heights ranging from 10-750 mm, and wall thicknesses ranging from 8-20 mm. HM can also customize the size, shape, and tolerance to meet specific requirements.

Tungsten Crucible Material 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 Crucible Stock Dimensions

Diameter（mm）		Wall Thickness（mm）		Height（mm）		Roughness
Diameter	Tolerance	Wall Thickness	Tolerance	Height	Tolerance	Roughness
30~50	±0.5	2~10	±0.5	20~80	±0.5	Ra≤1.6
50~100	±1	3~15	±1	20~80	±1	Ra≤1.6
100~150	±1	5~15	±1	20~500	±1.5	Ra≤1.6
150~250	±1	5~20	±1	30~500	±1.5	Ra≤2.5
250~350	±1.5	8~30	±1	30~500	±2	Ra≤2.5
350~450	±1.5	8~30	±1	30~550	±2	Ra≤2.5

Tungsten Crucible Properties

High density
High melting point
High boiling point
Low vapor pressure
Slow evaporation rate
Low thermal expansion coefficient
Good thermal conductivity
Good corrosion and wear resistance

Tungsten Crucible Production Process

Raw Material: Select high-purity tungsten powder.
Powder Metallurgy: High-purity tungsten powder is mixed, pressed, and molded into the preliminary shape of the crucible. common methods include isostatic pressing and die pressing.
Sintering: The molded tungsten crucible is placed in a high-temperature furnace and sintered under a vacuum or inert gas environment, usually at temperatures above 2000 ℃.
Machining: After sintering, the crucible undergoes further machining, including turning, milling, and polishing, to achieve precise dimensions and surface smoothness.
Surface Treatment: Coating, oxidation, or heat treatment to enhance the high-temperature resistance, corrosion resistance, and oxidation resistance.

Tungsten Crucible Types

Depending on the manufacturing process, tungsten crucibles can be classified into different types, as follows:

Forged Type
Sintered Type
Welded Type
Stamped Type
Spin-formed Type

Tungsten Crucible Applications

Rare earth smelting: Tungsten crucibles are commonly used in the smelting process of rare earth metals, capable of withstanding extremely high temperatures to ensure the stability and efficiency of the smelting process.
Quartz Glass Production: In the melting process of quartz glass, tungsten crucibles are used as the core vessel to withstand high temperatures and reduce contamination of the glass.
Crystal growth: Tungsten crucibles are widely used in sapphire single crystal growth furnaces to ensure the quality and success of the crystal growth process.
Electronic Spraying: In the spraying process of electronic components, tungsten crucibles can withstand high temperatures and harsh chemical environments to ensure the quality of spraying.

Tungsten Crucible Packaging

The Tungsten Crucible is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any 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

Download

SAFETY DATA SHEET (SDS) – Tungsten Metal

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To customize your tungsten crucible please provide the following details:

Diameter
Wall Thickness
Height
Tolerances
Purity (Specify the purity of material required.)
Surface Finish (polished, rough, oxide-coated, etc.)
Quantity of the products you need
Alternatively, you can provide a drawing with your specifications.

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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