Description: PSr 70 solder is a two-component alloy consisting of 70% silver and 26% copper. PSr 70 solder is a eutectic alloy with a melting point of 798°C.
Regulatory documentation: PSr 70 solders are manufactured in accordance with GOST 19738-2015, PSr 70 wire — GOST 19746-2015, PSr 70 strip — GOST 19739-2015.
Chemical composition of silver solders:
|
Solder grade |
Chemical composition, % |
|||||||||||||
|
Ag |
Cu |
Zn |
Sn |
Mn |
Sb |
P |
Cd |
Ni |
Pb |
Impurities, not more than |
||||
|
Pb |
Fe |
Bi |
Sum of determined impurities |
|||||||||||
|
PSr 70 |
70±0.5 |
26.0±0.5 |
Balance |
— |
— |
— |
— |
— |
— |
— |
0.050 |
0.10 |
0.005 |
0.15 |
Solder dimensions:
|
Solder grade |
Thickness, mm |
Width, mm |
Length, mm |
|||
|
Min |
Max |
Min |
Max |
Min |
Max |
|
|
PSr 70 |
0.1 |
5 |
50 |
200 |
100 |
400 |
Wire diameter:
|
Wire grade |
Diameter, mm |
|
|
Min |
Max |
|
|
PSr 70 |
0.15 |
6 |
Melting point, density, and electrical resistivity:
|
Solder grade |
Density, kg/m3 |
Melting point, K (°C) |
Electrical resistivity, 10-3 Ohm·m |
|
|
Upper critical point |
Lower critical point |
|||
|
PSr 70 |
9800 |
1043 (770) |
988 (715) |
4.1 |
Applications:
PSr 70 solder is used for brazing titanium and titanium alloys with stainless steel, and for brazing and tinning jewelry.
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