Silver nickel

Material

10%

20% in wire

20% in bars

40%

Nickel content % : 10 - 15 - 20 - 30 - 40 - 50
Size of grains ? FSSS : 2 to 5 μ

Manufacturing process : EXTRUSION, LAMINATED/ROLLING, DIE COMPACTED

NB : if the above criteria do not meet your needs, please contact us

Characteristics

Manufacturing process

EXTRUDED (E) or LAMINATED (B)

DIE COMPACTING (U)

Ni content (%)

10

20

30

40

30

40

Theorical density g/cm3

10.1

9.9

9.8

9.7

9.8

9.7

Vickers' hardness (annealed)

50±5

60±5

60±5

80±5

75±5

80±5

Electrical resistivity* at 20° C Ω mm2/m

0.0359

0.0639

0.115

0.246

0.0862

0.1724

Electrical conductibility at 20° C % IACS

48

27

15

7

20

10

* Measured by eddy current method

NB : for any other requirements, please consult our technicians

Delivery forms

Manufacturing process

E or B

U

Ni content %

10

15

20

30

20

30

40

WIRE

X

X

X

X

PROFILE

X

X

X

X

TIP

X

X

X

X

X

X

X

NB : for any other requirements, please consult our technicians

Assembly

Wire vertical

Wire horizontal

Profile

Tip

Contact surface < 12 mm2: possible without brazing alloy. The brazing quality (ratio of the brazed surface to the contact surface) depends on the assembly technique.

Contact surface >12 mm2: in the case of high nickel content, brazing alloy is often necessary.

In the case of assembly by resistance brazing method, phosphorous brazing alloy is recommended.

In the case of assembly by flame brazing, a material with a silver sub-layer is preferable.

Brazing alloys

Resistance brazing

Brazing

Ag 150 / Cu 800 / P 50

Ag 550 / Cu 210 / Zn 220 / Sn 20

Electrical test results

Nickel is a refractory material (melting point 1455°C) which is very malleable. Adding Ni to Ag improves the hardness of the silver, allowing it to retain good mechanical properties after undergoing an electrical arc. The high conductivity of the material and its easy handling, makes it ideal for intense applications provided that the current is low eg. relays, minicontactors, circuit breakers.

Comparative erosion AC4, 12A :

AgNi 90/10

18%

AgCdO 90/10

16%

Ag

100%

AgNi alloys with 20, 30, 40 % Ni are normally used for moving contacts in protection switchgears (circuit breakers, RCCB) taking into account the quality of the arc mobility despite its tendency to weld.

Applications

Any type of switchgear using current of between 0.5 and 250 A and 24 and 600 V.

This material is ideal for moving contacts in safety devices with nominal currents greater than 32 A.

It is also particularly suited for relays and contactors operating between 0.5 and 20 A.

Equipment

  • Relays
  • Contactors (< 20 A)
  • Switches
  • Circuit breakers
  • RCCB
  • Push-buttons

Uses

  • Industrial automatisms
  • Final circuit distribution
  • Domestic appliances
  • Line protection

Others conditions

We manufacture according to our customers' specifications. Our technicians are readily available to discuss contact forms, dimensions and brazing requirements.

 
 
 
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