ASTM B777-99 class4 tungsten alloy tube has high melting point, high temperature mechanical properties, high temperature vapor pressure and good conductivity. It is widely used as high temperature resistance furnace heating elements, quartz even furnace refractory metal parts, sapphire long crystal furnace heat field and thermocouple protection tube.
The properties of ASTM B777-99 class4 tungsten alloy tube are:
ASTM B777-99: class4
Matrix: 97%
Density:18.25~18.85g/cc
Hardness Rockwell Max: 35HRC
Ultimate Tensile Strength: 100 KSI and 689MPa
Yield Strength (0.2% offset): 75KSI and 517MPa
Elongation: 2%
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