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edits
Changes
→Brazing Alloys
For the brazing of contacts with a silver bottom layer to copper backings, phosphorous containing brazing alloys which eliminate the need for a flux application, are widely used.
The brazing alloy is typically introduced into the joint area in the form of wire segments, foil, shims or as powder or paste. For larger production volumes it is economically advantageous to pre-coat contact tips with a thin layer (≤ 100 µm) of brazing alloy.
<figtable id="tab:Commonly_Used_Brazing_Alloys_for_Electrical_Contacts">
<caption>'''<!--Table 4.2:-->Commonly_Used_Brazing_Alloys_for_Electrical_Contacts'''</caption>
{| class="twocolortable" style="text-align: left; font-size: 12px"
|-
!Designation<br/>DIN EN 1044
!Designation US<br/>(equivalent or closest similar brazing alloy)
!Designation<br/>DIN EN ISO 3677
!Composition<br/>wt %
!Melting Range (solidus)<br/>[°C]
!Melting Range (liquidus)<br/>[°C]
!Working Temperature<br/>[°C]
!Electrical Conductivity<br/>[MS/m]
!Density<br/>[g/m<sup>3</sup>]
!Application
|-
|AG304[i]
|BAg-1
|B-Ag40ZnCdCu<br/>595/630
|Ag39 - 41<br/>Cd18 - 22<br/>Cu18 - 20<br/>Zn19 - 23
|595
|630
|610
|14,0
|9,3
|Cu, Cu-Legierungen, Ag<br/>Fe, Ni
|-
|AG306[i]
|BAg-2a
|B-Ag30CuCdZn<br/>600/765
|Ag30 - 32<br/>Cu28 - 30<br/>Cd21 - 25<br/>Zn21 - 25
|600
|765
|680
|13,0
|9,2
|Cu, Cu-Legierungen, Ag<br/>Fe, Ni
|-
|AG309[i]
|
|B-Ag20CuZnCd<br/>605/765
|Ag20 - 22<br/>Cu40 - 42<br/>Zn25 - 29<br/>Cd15 - 19
|605
|765
|750
|12,0
|8,8
|Cu, Cu-Legierungen, Ag<br/>Fe, Ni
|-
|AG103
|BAg-7
|B-Ag55ZnCuSn<br/>630/660
|Ag54 - 56<br/>Cu20 - 23<br/>Zn20 - 24<br/>Sn1,5 - 2,5
|630
|660
|650
|8,4
|9,6
|Cu, Cu-Legierungen, Ag<br/>Fe, Ni
|-
|Ag502
|BAg-22
|B-Ag49ZnCuMnNi<br/>680/705
|Ag48 - 50<br/>Zn21 - 25<br/>Cu15 - 17<br/>Mn6,5 - 8,5<br/>Ni4 - 5
|680
|705
|690
|4,0
|8,9
|W, Mo, Hartmetallstahl<br/>Fe, Ni
|-
|Ag401
|BAg-8
|B-Ag72<br/>780
|Ag71 - 73<br/>Cu Rest
|780
|780
|780
|46,1
|10,0
|Cu, Cu-Legierungen, Ag<br/>Vakuumlöten
|-
|CP 102
|BCuP-5
|B-Cu80AgP<br/>645/800
|Ag14,5 - 15,5<br/>P4,7 - 5,3<br/>Cu Rest
|645
|800
|710
|7,0
|8,4
|Cu, Cu-Legierungen, Ag
</figtable>
[i] Die Herstellung oder Verwendung von cadmiumhaltigen Hartloten ist in der Europäischen Union seit Dezember 2011 verboten
== Fluxes ==