Elmet Technologies Pure Tungsten Rod

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Elmet Technologies Pure Tungsten Rod
Categories:	Metal; Nonferrous Metal; Refractory Metal; Tungsten Alloy; Pure Element
Material Notes:	The chemical composition complies with ASTM requirements for powder lot analysis. Actual finished part chemical analysis and mechanical properties are not routinely evaluated per ASTM requirements. ASTM specifications and test methods are used as guidelines to control and monitor production processes to assure product quality. Applicable ASTM Material Standards: Rod/Wire – F288-96 (re-approved 2002). This product meets the requirements of low copper and mercury-free materials. Information provided by Elmet Technologies.
Vendors:	Elmet Technologies is a 100% US owned and operated, fully integrated manufacturer of Molybdenum, Tungsten and related alloys such as TZM, WHA & MoLa. At our 220,000 sqr/ft plant in Lewiston, Maine, Elmet manufactures W & Mo pure powders plus rod, wire, plate, sheet & foil in additional to offering fabrication and machining services. ITAR, ISO and AS9100 registered. www.elmettechnologies.com Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	>= 19.3 g/cc
a Lattice Constant	3.1585 Å
Vapor Pressure	1.93e-15 torr @Temperature 1527 °C
	7.90e-9 torr @Temperature 2127 °C
	3.99e-8 torr @Temperature 2000 °C
	0.00000500 torr @Temperature 2500 °C
	0.0000650 torr @Temperature 2727 °C
	0.000997 torr @Temperature 3000 °C
	0.00468 torr @Temperature 3227 °C

Chemical Properties	Original Value	Comments
Atomic Mass	183.92
Atomic Number	74
Atomic Volume	9.53	[cc/gm atom]

Mechanical Properties	Original Value	Comments
Modulus of Elasticity	59000 ksi

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000550 ohm-cm @Temperature 20.0 °C
	0.00000728 ohm-cm @Temperature 100 °C
	0.0000180 ohm-cm @Temperature 500 °C
	0.00002243 ohm-cm @Temperature 700 °C
	0.0000330 ohm-cm @Temperature 1000 °C
	0.00003465 ohm-cm @Temperature 1100 °C
	0.00004966 ohm-cm @Temperature 1500 °C
	0.00005752 ohm-cm @Temperature 1800 °C
	0.00006961 ohm-cm @Temperature 2100 °C
	0.00100 ohm-cm @Temperature 3000 °C

Thermal Properties	Original Value	Comments
CTE, linear	4.45 µm/m-°C @Temperature 0.000 - 500 °C	Annealed
	4.98 µm/m-°C @Temperature 0.000 - 500 °C	worked
Specific Heat Capacity	0.140 J/g-°C
Thermal Conductivity	0.222 cal cm/sec-cm²-°C @Temperature 2000 °C
	0.245 cal cm/sec-cm²-°C @Temperature 1727 °C
	0.253 cal cm/sec-cm²-°C @Temperature 1527 °C
	0.260 cal cm/sec-cm²-°C @Temperature 1327 °C
	0.268 cal cm/sec-cm²-°C @Temperature 1127 °C
	0.275 cal cm/sec-cm²-°C @Temperature 927 °C
	0.290 cal cm/sec-cm²-°C @Temperature 500 °C
	0.380 cal cm/sec-cm²-°C @Temperature 100 °C
	0.400 cal cm/sec-cm²-°C @Temperature 20.0 °C
Melting Point	3410 °C
Boiling Point	5900 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.0025 %
Carbon, C	<= 0.0050 %
Chromium, Cr	<= 0.0020 %
Copper, Cu	<= 0.0010 %
Iron, Fe	<= 0.0030 %
Molybdenum, Mo	<= 0.0050 %
Nickel, Ni	<= 0.0030 %
Other, each	<= 0.0020 %
Oxygen, O	<= 0.0050 %
Potassium, K	<= 0.0020 %
Silicon, Si	<= 0.0040 %
Sodium, Na	<= 0.0020 %
Tungsten, W	>= 99.95 %

Descriptive Properties
Electron Work Function	4.55
Lattice Structure	Body Centered Cubic
RoHS Compliance	2002/95/EC

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NELMET931 / 242052

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