SILVER BRAZING ALLOYS CADMIUM FREE
The following are general purpose brazing alloys, suitable to join easily a wide range of ferrous and non-ferrous base materials (iron, steel, stainless steel, copper, brass, etc.).
Continuous service operating temperatures of joints brazed with these alloys range up to approx 200 °C.
When joining stainless steel in wet environments, in order to avoid failure of the joint due to interfacial corrosion, it is recommended to use zinc-free alloys (Ag60Sn/1), or alloys with Nickel additions.
Available in many different presentation forms (rods, flux-coated rods, wires, strips, rings, preforms, pastes and powders), these alloys are very free flowing, ductile and strong.
All these alloys do not contain Cadmium, do not present the Health & Safety concerns associated with Cadmium-bearing alloys and are RoHS compliant.
They are divided in two categories: alloys with Tin and alloys without Tin; Tin being used to lower the melting temperature of the alloy.
When brazing in an oxidizing environment (that is: in air), the use of a proper flux is required.
| Code | Composition % | Melting Range SOL-LIQ | Density | Tensile strength | Standard | |||||||
| Ag | Cu | Zn | Sn | Si | °C | g/cm3 | kg/mm2 | ISO 17672 | EN 1044 | AWS A5.8 | ||
Silver alloys with Tin |
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| Ag60Sn | 60 | 23 | 14 | 3 | – | 620-685 | 9,6 | 48 | — | AG 101 | — |  |
| Ag60Sn/1 | 60 | 30 | – | 10 | – | 600-730 | 9,8 | – | Ag 160 | AG 402 | BAg-18 | |
| Ag56Sn | 56 | 22 | 17 | 5 | – | 620-655 | 9,4 | 48 | Ag 156 | AG 102 | BAg-7 | |
| Ag55Sn | 55 | 21 | 22 | 2 | – | 630-660 | 9,4 | 44 | Ag 155 | AG 103 | — | |
| Ag45Sn | 45 | 27 | 25,5 | 2,5 | – | 640-680 | 9,2 | 43 | Ag 145 | AG 104 | BAg-36 | |
| Ag40Sn | 40 | 30 | 28 | 2 | – | 650-710 | 9,1 | 44 | Ag 140 | AG 105 | BAg-28 | |
| Ag38Sn | 38 | 32 | 28 | 2 | – | 650-720 | 9,1 | 45 | Ag 138 | — | BAg-34 | |
| Ag34Sn | 34 | 36 | 27,5 | 2,5 | – | 630-730 | 9 | 48 | Ag 134 | AG 106 | — | |
| Ag30Sn | 30 | 36 | 32 | 2 | – | 665-755 | 8,8 | 48 | Ag 130 | AG 107 | — | |
| Ag25Sn | 25 | 40 | 33 | 2 | – | 680-760 | 8,8 | 48 | Ag 125 | AG 108 | BAg-37 | |
Silver alloys without Tin |
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| Ag83 | 83 | 15 | 2 | – | – | 780-830 | 10,2 | – | — | — | — | |
| Ag81 | 81 | 13 | 6 | – | – | 725-800 | 10 | 36 | — | — | — | |
| Ag74 | 74 | 18 | 8 | – | – | 740-780 | 9.8 | 41 | — | — | — | |
| Ag67.5 | 67.5 | 23.5 | 9 | – | – | 700-730 | 9.7 | 47 | — | — | — | |
| Ag65 | 65 | 20 | 15 | – | – | 670-720 | 9,6 | 41 | Ag 265 | — | BAg-9 | |
| Ag60 | 60 | 26 | 14 | – | – | 695-730 | 9,5 | 45 | — | AG 202 | — | |
| Ag45 | 45 | 30 | 25 | – | – | 665-745 | 9,1 | 42 | Ag 245 | — | BAg-5 | |
| Ag44 | 45 | 30 | 26 | – | – | 675-735 | 9,1 | 51 | Ag 244 | AG 203 | — | |
| Ag40 | 40 | 30 | 30 | – | – | 660-720 | 9,1 | 46 | — | — | — | |
| Ag35 | 35 | 32 | 33 | – | – | 685-755 | 9 | 48 | Ag 235 | — | BAg-35 | |
| Ag33 | 33 | 33,5 | 33,5 | – | – | 680-750 | 9 | 55 | — | — | — | |
| Ag30 | 30 | 38 | 32 | – | – | 680-765 | 8,9 | 50 | Ag 230 | AG 204 | BAg-20 | |
| Ag25 | 25 | 40 | 35 | – | – | 700-790 | 8,8 | 45 | Ag 225 | AG 205 | — | |
| Ag20 | 20 | 44 | 36 | – | 0,15 | 690-810 | 8,7 | 43 | — | AG 206 | — | |
| Ag12 | 12 | 48 | 40 | – | 0,15 | 800-830 | 8,4 | 48 | Ag 212 | AG 207 | — | |
| Ag5 | 5 | 55 | 40 | – | 0,15 | 820-870 | 8,4 | 48 | Ag 205 | AG 208 | — | |
| Make-up | ||||
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Rods | Ø; | 0,5 ÷ 4 mm |
Length: 500 / 1.000 mm |
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Coated rods | Ø: | 1,5 – 2 – 2,5 – 3 mm | Length: 500 mm / Different kinds of coating available in various colours |
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Wires | Ø: | 0,25 ÷ 3 mm |
Coils and Spools |
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Strips | Thickness: | 0,1 ÷ 1 mm |
Width: 1,3 → 80 mm |
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Powder and Paste | |||
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Rings | |||
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Preforms from Wire and from Strip | |||