Mi-Tech Metals HD17BB Tungsten-Based Metal

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Mi-Tech Metals HD17BB Tungsten-Based Metal
Categories:	Metal; Nonferrous Metal; Refractory Metal; Tungsten Alloy
Material Notes:	ASTM B-777-07 Class 1; Slightly Magnetic (HD17 is non-magnetic). Manufactured by powder metallurgy methods. The tungsten base offers high thermal conductivity and a low CTE which combine to resist thermal fatigue. The high melting point reduces soldering or erosion problems. To increase the machinability of this brittle metal, alloying elements are added and practical use of tungsten is possible for die casting tools. Used in resistance brazing and high temp applications. Used as counter weights and counter balances, radiation shielding components, tool shanks for boring bars and other tools for chatter-free machining. Data provided by Mi-Tech Metals.
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Physical Properties	Original Value	Comments

Density	17.0 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	24
Tensile Strength, Ultimate	758 MPa
Tensile Strength, Yield	620 MPa @Strain 0.2 %
Elongation at Break	8.0 %	in 50 mm
Modulus of Elasticity	276 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000120 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	5.40 µm/m-°C @Temperature 20.0 - 400 °C
Thermal Conductivity	96.0 W/m-K

Component Elements Properties	Original Value	Comments
Copper, Cu	4 %	Includes Iron (Cu + Fe = 4%)
Nickel, Ni	6 %
Tungsten, W	90 %

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NMITECH24b / 120770

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