Note: according to customers demand processing production

Electrical contacts with tungsten round piece of technical conditions

Chemical composition

W	Fe	Mo	other
≥99.97%	≤0.01%	≤0.01%	≤0.01

Physical properties

 

Straight path(mm)	Hard degrees(kg/mm2)	Crystal digits(pee/mm2)
<3.0	>470	>12000
3.0-<4.0	>460	>10000
4.0-<5.0	>450	>8000
5.0-<7.0	>430	>6000
7.0-<9.0	>410	>6000

 

Surface quality state

	roughnessA	B	striation
rounds	0.2um	5.0um	2.0um

 

precision

	diameter	thickness	Parallel degree	Spherical radius
rounds	±0.05mm	±0.05mm	±0.02mm	按有關附圖

next  page