Soft solders

Silver-tin alloys offer a number of advantages over tin-lead solders. They have excellent soldering characteristics of alloy flow, aesthetic appearance and wetting. They demonstrate improved strength characteristics over conventional tin-lead alloys, particularly where service at moderately elevated temperatures is a factor. Being lead-free they may be used in plumbing installations and food-handling equipment.

COMSOL™ has excellent creep resistance when compared to tin-lead solders at room and elevated temperature.

 

Lead-free

Sn Ag ISO 9453 Melting Range
96 4 Alloy No. 701 221oC

 

Johnson Matthey's P40 is a 4% silver-tin soft soldering alloy. P40 has excellent soldering characteristics and offers a number of advantages over conventional tin-lead alloys. It provides improved strength characteristics particularly where service at moderately elevated temperatures is a factor. 

Being lead free, P40 may be used in plumbing installations, particularly where soft water is in use. P40 is widely used in food handling equipment where lead contamination must be avoided.

P40 is a good colour match on stainless steel and the resulting joints are not prone to interfacial (crevice) corrosion. The optimum joint gap for P40 is 0.075mm.

Sn Ag Melting Range
97.5 2.5 221 - 225oC

 

Johnson Matthey PLUMBSOL is a 2.5% silver-tin soft soldering filler metal. Like P40 this alloy is lead free. PLUMBSOL has excellent soldering characteristics and offers a number of advantages over conventional tin-lead alloys. It provides improved strength characteristics particularly where service at moderately elevated temperatures is a factor. 

PLUMBSOL is a good colour match on stainless steel and the resulting joints are not prone to interfacial (crevice) corrosion. 

The optimum joint gap for PLUMBSOL is 0.075mm.

Sn Ag ISO 9453 Melting Range
95 5 Alloy No. 704 221 - 235oC

 

Johnson Matthey P5 is a 5% silver-tin soft soldering filler metal. Like P40 this alloy is lead free. P5 has excellent soldering characteristics and offers a number of advantages over conventional tin-lead alloys. It provides improved strength characteristics particularly where service at moderately elevated temperatures is a factor. 

P5 is a good colour match on stainless steel and the resulting joints are not prone to interfacial (crevice) corrosion. 

The optimum joint gap for P5 is 0.075mm.

Sn Cu ISO 9453 Melting Range
97 3 Alloy No. 402 230 - 250oC

 

Johnson Matthey's 97C has a longer melting range than 99C™ and consequently builds up greater fillets and is a better gap filler. It is now being used extensively on automotive radiators.

Sn Cu ISO 9453 Melting Range
99 1 Alloy No. 401 230 - 240oC

 

Johnson Matthey's 99C is a lead free solder which has a short melting range and good flow characteristics. It has been adopted as the universal plumbers solder.

Sn Ag Cu Melting Range
87 10 3 214 - 275oC

 

Sn Sb ISO 9453 Melting Range
95 5 Alloy No. 201 230 - 240oC

 

This is a tin-antimony soft soldering alloy with good flow characteristics.

Silver-(Tin)-Lead

Ag Sn Pb ISO 9453 Melting Range
2 62 36 Alloy No. 171 178 - 190oC

 

This product is a silver-tin-lead soft soldering alloy. It demonstrates good flow characteristics when molten.

Ag Sn Pb ISO 9453 Melting Range
1.5 5 93.5 Alloy No. 191 296oC

 

Johnson Matthey Comsol is a high melting point (296°C) silver-tin-lead soft solder. It can be supplied as a solid wire, as a flux cored wire with rosin, synthetic resin or acid type fluxes and as a specially formulated solder paste.

Ag Pb ISO 9453 Melting Range
2.5 97.5 Alloy No. 181 304oC

 

Johnson Matthey A25 is a 2.5% silver-lead soldering filler metal. It offers increased strength and creep resistance at elevated temperatures over conventional tin-lead solders. The silver addition improves wetting of A25 onto copper and copper-based alloys and to a lesser extent on steels. Flow of the alloy is not as good as tin lead alloys. The optimum joint gap for A25 is 0.2mm.

Ag Pb ISO 9453 Melting Range
5 95 Alloy No. 182 304 - 370oC

 

Johnson Matthey A5 is a 5% silver-lead soldering filler metal. It offers increased strength and creep resistance at elevated temperatures over conventional tin-lead solders. The silver addition improves wetting of A5 onto copper and copper-based alloys and to a lesser extent on steels. 

Flow of the alloy is not as good as tin lead alloys and the alloy has a long melting range. The optimum joint gap for A5 is 0.2mm.

Tin Lead:

Product  Sn  Pb  Melting Range  ISO 5943  Flow Characteristics when Molten
 JM595  5  95  300-315 C  Alloy no 123  Sluggish
 JM1090  10  90  268-302 C  Alloy no 122  
 JM1585  15  85  225-290 C  Alloy no 121  Sluggish
 JM2080  20  80  183-275 C  Alloy no 117  Sluggish
 JM3070  30  70  185-255 C  Alloy no 116  Sluggish
 JM3565  35  65  183-245 C  Alloy no 115  Sluggish
 JM4060  40  60  183-235 C  Alloy no 114  Sluggish
 JM4552  45  52.5  185-215 C    Sluggish
 JM4555  45  55  183-224 C  Alloy no 113  Sluggish
 JM5050  50  50  183-215 C  Alloy no 112  Medium
 JM5840  40  58  185-231 C  Alloy no 134  Sluggish
 JM5941  59  41  183-190 C    Good
 JM6040  60  40  183-190 C  Alloy no 103  Good
 JM6337  63  37  183 C  Alloy no 102  Good

 

Low Melting Indium:

Product  In  Sn  Pb  Ag  Melting Range  ISO 9453
 LM118E  52  48      118 C  Alloy no 601
 LM149E  80    15  5  149-154 C  
 LM157E  100        157 C  
 LM195  58    39  3  165-195 C  
 LM210  50    50    184-210 C  

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