Description: PSr 1 solder is a two-component silver-copper alloy. PSr 1 is a eutectic alloy.

Regulatory documentation: PSr 1 solders are manufactured in accordance with GOST 19738-2015, PSr 1 wire — GOST 19746-2015, PSr 1 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 1

1.0±0.2

—

—

35.0±1.0

—

0.9±0.4

—

2.5±0.5

—

Balance

—

0.15

0.010

0.15

Solder dimensions:

Solder grade

Thickness, mm

Width, mm

Length, mm

Min

Max

Min

Max

Min

Max

PSr 1

0.1

5

50

200

100

400

Wire diameter:

Wire grade

Diameter, mm

Min

Max

PSr 1

0.5

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 1

9400

508 (235)

498 (225)

26.0

Applications:

PSr 1 solder is used for soldering and tinning of silver parts.

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Conversational Form (#3)