ASTM B777-15 class3 tungsten alloy tube has extremely high melting point, low thermal expansion coefficient and very low saturation vapor pressure, which still has good support at high temperature. It is mainly used in thermocouple protection tubes in high temperature furnaces, sapphire single crystal furnaces, support parts in high temperature sintering furnaces, etc.

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The properties of ASTM B777-15 class3 tungsten alloy tube are:
Matrix: 95% W
Density: 17.75~18.35g/cc
Hardness Rockwell Max: 34HRC
Standard Alloy
Ultimate Tensile Strength: 105 KSI and 724 MPa
Yield Strength (0.2% offset): 75 KSI and 517 MPa
Elongation: 3%
Nonmagnetic Alloy
Ultimate Tensile Strength: 94 KSI and 648 MPa
Yield Strength (0.2% offset): 75 KSI and 517 MPa
Elongation: 1%

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