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.
All these alloys do not contain Cadmium, do not present the Health Safety concerns associated with Cadmium-bearing alloys and are RoHS compliant. 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.
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.
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.
Table and main features
| Code | Composition % | Melting range SOL-LIQ °C |
Density g/cm3 |
Tensile Strength kg/mm2 |
Standard | ||||||||
| ag | cu | zn | sn | si | ISO 17672 | EN 1044 | AWS A5.8 | ||||||
| Ag60Sn | 60 | 23 | 14 | 3 | - | 620-685 | 9,6 | 48 | - | AG 101 | - |
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| Ag60Sn/1 | 60 | 30 | - | 10 | - | 600-730 | 9,8 | - | Ag 160 | AG 402 | BAg-18 |
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| Ag56Sn | 56 | 22 | 17 | 5 | - | 620-655 | 9,4 | 48 | Ag 156 | AG 102 | BAg-7 |
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| Ag55Sn | 55 | 21 | 22 | 2 | - | 630-660 | 9,4 | 44 | Ag 155 | AG 103 | - |
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| Ag45Sn | 45 | 27 | 25,5 | 2,5 | - | 640-680 | 9,2 | 43 | Ag 145 | AG 104 | BAg-36 |
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| Ag40Sn | 40 | 30 | 28 | 2 | - | 650-710 | 9,1 | 44 | Ag 140 | AG 105 | BAg-28 |
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| Ag38Sn | 38 | 32 | 28 | 2 | - | 650-720 | 9,1 | 45 | Ag 138 | - | BAg-34 |
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| Ag34Sn | 34 | 36 | 27,5 | 2,5 | - | 630-730 | 9 | 48 | Ag 134 | AG 106 | - |
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| Ag32Sn | 32 | 35 | 30,5 | 2,5 | - | 660-740 | 8,8 | - | - | - | - | ||
| Ag30Sn | 30 | 36 | 32 | 2 | - | 665-755 | 8,8 | 48 | Ag 130 | AG 107 | - |
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| Ag25Sn | 25 | 40 | 33 | 2 | - | 680-760 | 8,8 | 48 | Ag 125 | AG 108 | BAg-37 |
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| Ag17Sn | 17 | 47,5 | 33,5 | 2 | - | 690-810 | 8,7 | - | - | - | - | ||
| Code | Composition % | Melting range SOL-LIQ °C |
Density g/cm3 |
Tensile Strength kg/mm2 |
Standard | ||||||||
| ag | cu | zn | sn | si | ISO 17672 | EN 1044 | AWS A5.8 | ||||||
| Ag83 | 83 | 15 | 2 | - | - | 780-830 | 10,2 | - | - | - | - |
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| Ag81 | 81 | 13 | 6 | - | - | 725-800 | 10 | 36 | - | - | - |
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| Ag74 | 74 | 18 | 8 | - | - | 740-780 | 9,8 | 41 | - | - | - |
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| Ag67,5 | 67,5 | 23,5 | 9 | - | - | 700-730 | 9,7 | 47 | - | - | - |
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| Ag65 | 65 | 20 | 15 | - | - | 670-720 | 9,6 | 41 | Ag 265 | - | BAg-9 |
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| Ag60 | 60 | 26 | 14 | - | - | 695-730 | 9,5 | 45 | - | AG 202 | - |
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| Ag45 | 45 | 30 | 25 | - | - | 665-745 | 9,1 | 42 | Ag 245 | BAg-5 |
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| Ag44 | 44 | 30 | 26 | - | - | 675-735 | 9,1 | 51 | Ag 244 | AG 203 | - |
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| Ag40 | 40 | 30 | 30 | - | - | 660-720 | 9,1 | 46 | - | - | - |
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| Ag35 | 35 | 32 | 33 | - | - | 685-755 | 9 | 48 | Ag 235 | - | BAg-35 |
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| Ag33 | 33 | 33,5 | 33,5 | - | - | 680-750 | 9 | 55 | - | - | - |
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| Ag30 | 30 | 38 | 32 | - | - | 680-765 | 8,9 | 50 | Ag 230 | AG 204 | BAg-20 |
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| Ag25 | 25 | 40 | 35 | - | - | 700-790 | 8,8 | 45 | Ag 225 | AG 205 | - |
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| Ag20 | 20 | 44 | 36 | - | 0,15 | 690-810 | 8,7 | 43 | - | AG 206 | - |
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| Ag18 | 18 | 46 | 36 | - | 0,15 | 720-820 | 8,5 | - | - | - | - | ||
| Ag12 | 12 | 48 | 40 | - | 0,15 | 800-830 | 8,4 | 48 | Ag 212 | AG 207 | - |
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| Ag5 | 5 | 55 | 40 | - | 0,15 | 820-870 | 8,4 | 48 | Ag 205 | AG 208 | - |
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MAKE-UPS
rods
coated rods
wires
flux-cored rods and wires
strips
powders and pastes
rings
preforms from wire
preforms from strip
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BRAZING ALLOYS FOR HVACR INDUSTRY