Characteristic and Application of
  Material Kind

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GRADE

COMPOSITION

%

DENSITY g/Cm3

ELECTRICAL CONDUCTIVITY IACS %

HARDNESS
( HRB )

APPLICATION

Copper
Tungsten

Cu20±3W80±3
Cu25±3W75±3
Cu30±3W70±3
Cu35±3W65±3
Cu40±3W60±3

15.1~15.7
14.3~15.1
13.7~14.5
13.2~14
12.8~13.7

32~42
37~47
43~53
45~55
47~57
95~105
90~100
85~95
80~90
78~90

Extra-high voltage breaker, ARC TIP, GCB, OCB, GLBS, ASS, ARD contact of ACB, and ATS. Contact of the tap conversion transformer, starter contact for automobiles, electrode spot welding tips for discharging process.

Silver
Tungten

Ag20±3W80±3
Ag30±3W70±3
Ag35±3W65±3
Ag40±3W60±3
Ag50±3W50±3

16.2~16.9
14.7~15.7
14.3~15.1
13.7~14.5
12.9~13.7
35~45
45~55
48~58
50~60
55~65
90~105
85~95
80~90
75~85
65~75

Current breakers, contact of air circuit breakers, breaker of motor cars, ACB, NFB, electrode spot welding tips for discharging process of ELB contact

Silver
Carbon


Ag95±2Gr 3±1±a2
Ag90±2Gr 5±1±a5
Ag85±2Gr 7±1±a8
Ag75±3Gr20±1±a5


7.5~9.5
7.0~8.0
5.5~6.5
4.7~5.7

전기비저항 μ Ω-cm
2~13
5~20
10~20
20~40

HS
5~15
10~20
15~30
20~35

Contact point for communication devices, DC relay,  contact point for railroad signal, vessel slip ring brush, and brush for tacho-generator

Copper
Carbon
Cu95±2Gr 3±1±a2
Cu90±2Gr 5±1±a5
Cu85±2Gr 5±1±a10
Cu80±3Gr10±1±a10
6.8~7.8
6~7
5.5~7
5~6
3~15
5~20
10~30
20~40
4~14
10~20
15~30
20~40

Carbon for current collection, aging brushes, current collector for subway, brushes for grounding