CMW® 3950 AMS-T-21014 ASTM B777 High Density Machinable Tungsten

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CMW® 3950 AMS-T-21014 ASTM B777 High Density Machinable Tungsten (discontinued **)
Categories:	Metal; Nonferrous Metal; Refractory Metal; Tungsten Alloy
Material Notes:	This material has been rebranded as NAECOMET® 3950. Uses: Radiation Shielding, High Mass, Gyro, Ordnance. Machinability is similar to gray iron. Information provided by CMW Inc.
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Physical Properties	Metric	English	Comments

Density	18.0 g/cc	0.650 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell A	63 @Temperature 600 °C	63 @Temperature 1110 °F	40 HRA
Hardness, Rockwell C	28	28
Tensile Strength, Ultimate	896 MPa	130000 psi
Tensile Strength, Yield	621 MPa	90100 psi
Elongation at Break	15 %	15 %
Modulus of Elasticity	365 GPa	52900 ksi
Compressive Yield Strength	621 MPa	90100 psi
Fatigue Strength	465 MPa	67400 psi	High cycle unnotched
Charpy Impact	4.70 J	3.47 ft-lb	Notched
Charpy Impact, Unnotched	54.2 J	40.0 ft-lb

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000133 ohm-cm	0.0000133 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	4.60 µm/m-°C @Temperature 20.0 - 400 °C	2.56 µin/in-°F @Temperature 68.0 - 752 °F
	5.80 µm/m-°C @Temperature 20.0 - 800 °C	3.22 µin/in-°F @Temperature 68.0 - 1470 °F
Thermal Conductivity	110 W/m-K	763 BTU-in/hr-ft²-°F
Melting Point	1425 - 3410 °C	2597 - 6170 °F
Solidus	1425 °C	2597 °F
Liquidus	3410 °C	6170 °F

Component Elements Properties	Metric	English	Comments
Iron, Fe	1.5 %	1.5 %
Nickel, Ni	3.5 %	3.5 %
Tungsten, W	95 %	95 %

**
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NCMW06 / 15877

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