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These alloys are generally less fluid than the General Purpose Silver Brazing Alloys and their higher brazing temperatures lead to increased demands on the flux used with these alloys.

For this reason they are generally not supplied in a flux-coated form as premature flux exhaustion can result in increased post-braze cleaning costs.

These alloys have a greater strength above 200°C than the General Purpose Silver Brazing Alloys and are used where this is a design consideration.

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

Thessco Grade ISO 17672:2016 Nominal Composition (%) Melting Range (°C)
Silver Copper Zinc Silicon Solidus Liquidus
T124 63 24 13 0.15 690 730
T120 60 26 14 0.15 695 730
T88 Ag 244Si 44 30 26 0.15 675 735
T60 Ag 230Si 30 38 32 0.15 680 765
T50 Ag 225Si 25 40 35 0.15 700 790
L13S/T40 Ag 220Si 20 44 36 0.15 690 810
T28 14 51 35 0.15 810 835
L5S/T24 Ag 212Si 12 48 40 0.15 800 830

Available in –Rods & Wire – 0.8mm to 6mm Strip & Foil – from 0.08mm to 3mm thickness Powders & Paste. Safety Data Sheets are available on request.

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

Thessco Grade ISO 17672:2016 Nominal Composition (%) Melting Range (°C)
Silver Copper Zinc Solidus Liquidus
H3 63 24 13 690 730
H0 60 26 14 695 730
M14 Ag 244 44 30 26 675 735
M13 43 37 20 690 770
M0 Ag 230 30 38 32 680 765
L18 Ag 225 25 40 35 700 790
L7 14 51 35 810 835