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Ternary brazing alloys typically have lower fluidity compared to General Purpose Silver Brazing Alloys. Their higher brazing temperatures also place greater demands on the flux used with these alloys.
For this reason, they are generally not supplied in a flux-coated form, as premature exhaustion of the flux can lead to increased cleaning costs after brazing.
Additionally, these ternary brazing alloys provide greater strength above 200°C compared to General Purpose Silver Brazing Alloys, making them suitable for applications where this strength 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 | |
