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These alloys are the optimum choice for a large range of industrial metal joining applications. The free-flowing properties of these alloys, coupled with good joint strengths means that they find use when joining dissimilar parent metals (e.g. stainless steel, mild steels, brasses, bronzes and copper) in a wide range of environments, from industrial cooling to food and pharmaceutical manufacture.

The use of a suitable flux for the parent metal / brazing alloy combination is a requirement for these alloys.

The table below details the alloys that contain silicon and generally preferred by European manufacturers.

 

Thessco Grade ISO 17672:2016 Nominal Composition (%) Melting Range (°C)
Silver Copper Zinc Tin Silicon Solidus Liquidus
CS114 Ag 156Si 56 22 17 5.0 0.15 620 655
CS111 Ag 155Si 55 21 22 2 0.15 630 660
CS91 Ag 145Si 45 27 25.5 2.5 0.15 640 680
CS81 Ag 140Si 40 30 28 2 0.15 650 710
CS77 Ag 138Si 38 32 28 2 0.15 650 720
CS71 Ag 134Si 34 36 27.5 2.5 0.15 630 730
CS61 Ag 130Si 30 36 32 2 0.15 665 755
CS51 Ag 125Si 25 40 33 2 0.15 680 760

The table below details the equivalent alloys which are silicon free and are generally preferred by UK manufacturers.

Thessco Grade ISO 17672:2016 Nominal Composition (%) Melting Range (°C)
Silver Copper Zinc Tin Solidus Liquidus
H12 Ag 272 72 28 780 780
M26T Ag 156 56 22 17 5.0 620 655
M25T Ag 155 55 21 22 2 630 660
M15T Ag 145 45 27 25.5 2.5 640 680
M10T Ag 140 40 30 28 2 650 710
M8T Ag 138 38 32 28 2 650 720
M4T Ag 134 34 36 27.5 2.5 630 730
M0T Ag 130 30 36 32 2 665 755
L18T Ag 125 25 40 33 2 680 760