Electric purpose tungsten contact
Specific gravity ≥19.1g/cm3~19.3 g/cm3
Crystal grain number ≥ 10,000PCS/mm2
Hardness ≥ 71-74HRA
Size allowable tolerance d.h±0.05mm (It can produce the goods according to the client's specific drawings.)
Seat nail material is low carbon steel whose carbon content is equal to or less than 0.10%.
The copper purity of copper welding material is equal to or larger than 99.95%.
Welding point strength ≥ 83MPa
It strictly produces the goods according to P.R. China Mechanical Industry Standard.
Electric purpose tungsten sheet
Specific gravity ≥19.1g/cm3¡«19.3g/cm3
Crystal grain number ≥10,000 a/mm2
Size allowable tolerance d.h±0.05mm(It can produce the goods according to the client's coming drawings.)
The current regular specifications:
Thickness: Above h0.5mm
Spherical surface: SR13mm¡«50mm
Special requirement size allowable tolerance can be d.h±0.02mm
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