The presence of cadmium reduces the melting range of the alloy and increases its fluidity. Generally a low silver content produces an alloy with a high melting point and wide melting range. Alloys with wide melting ranges produce larger fillets and can accommodate larger joint gaps. It is often a fallacy that the cheapest alloy to use contains less silver. The cheapest joints are those with a small gap and a small fillet. Please ask for our technical help in producing low cost joints. All alloys are available in bare form or flux coated. Alloys containing cadmium can produce harmful fumes and in most instances are not permitted to be used in the medical and food industry. It is the policy of CWB Ltd to promote cadmium free alloys.
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PHYSICAL CHARACTERISTICS |
|||||||||
Product |
|
Melting Range |
Tensile Strength |
|
||||||
Composition % |
Ag |
Cu |
Zn |
Cd |
ºC |
Kg/mm 2 |
EN-1044 |
DIN 8513 |
BS 1845 |
|
SILWELD 50 Cd |
50 |
15 |
17 |
18 |
620 - 635 |
43 |
AG 301 |
L-Ag-50 Cd |
AG1 |
|
SILWELD 45 Cd |
45 |
15 |
16 |
24 |
605 - 620 |
43 |
AG 302 |
L-Ag-45Cd |
|
|
SILWELD 42 Cd |
42 |
17 |
16 |
25 |
610 - 620 |
42 |
AG 303 |
|
AG2 |
|
SILWELD 40 Cd |
40 |
19 |
21 |
20 |
595 - 630 |
42 |
AG 304 |
L-Ag-40 Cd |
AG10 |
|
SILWELD 38 Cd |
38 |
20 |
22 |
20 |
615 - 680 |
40 |
|
|
AG3 |
|
SILWELD 35 Cd |
35 |
26 |
21 |
18 |
606 - 702 |
40 |
|
|
AG11 |
|
SILWELD 34 Cd |
34 |
25 |
20 |
21 |
610 - 670 |
40 |
AG 305 |
L-Ag-34 Cd |
|
|
SILWELD 30 Cd |
30 |
28 |
21 |
21 |
600 - 690 |
38 |
AG 306 |
L-Ag-30 Cd |
AG12 |
|
SILWELD 20 Cd |
20 |
39 |
29 |
12 |
600 - 760 |
40 |
AG 309 |
L-Ag-20 Cd |
|
|
Product |
Ag % |
Fluidity |
Application |
SILWELD 50 Cd |
50 |
9 |
Silweld 50 Cd is one of the lower melting brazing alloys composed of silver, copper, zinc and cadmium. It is used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals. It has a narrow melting range, which is not apparent in most brazing operations, making it flow freely through a capillary. |
SILWELD 45 Cd |
45 |
8.5 |
Silweld 45 Cd is the lowest melting brazing alloy available . It can be used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals |
SILWELD 42 Cd |
42 |
8.5 |
Excellent flow characteristics. It can be used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals |
SILWELD 40 Cd |
40 |
8 |
Good flow characteristics for wide range of application. It can be used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals |
SILWELD 38 Cd |
38 |
7.5 |
Good flow characteristics for wide range of application. It can be used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals |
SILWELD 35 Cd |
35 |
7 |
Silweld 35 Cd is an alloy with a melting range suitable for brazing steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals. It is very free flowing and suited for general-purpose work. During melting, Silweld 35 Cd passes from the solid state to a sluggish or plastic state and progressively to a liquid making it ideal for badly fitted joints.. |
SILWELD 34 Cd |
34 |
7 |
Use with ferrous and non-ferrous base metals. Flow suitable bridging gaps |
SILWELD 30 Cd |
30 |
6 |
Silweld 30 Cd is historically a modification of Silweld 35 Cd with a further reduction in silver content resulting in a higher melting point and a longer melting range. Silweld 30 Cd is used for brazing steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals. |
SILWELD 20 Cd |
20 |
|
Good filler forming properties. Ideal for filling gaps on poor fitted joints |
The higher the fluidity rating, the faster the alloy flows within the melting range |
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SILVER BRAZING ALLOYS ARE AVAILABLE IN ROD, (BARE OR FLUX COATED) WIRE, RING, STRIP/FOIL AND PREFORM
The objective and purpose of the Fluxing in the brazing and welding processes is to prevent the formation, dissolve or facilitate the removal of the oxides or any other undesirable substance from the surfaces to be joined. Another fundamental objective of Fluxes is to assure the formation of a perfect brazed joint by protecting the base filler metal from oxidation and to reduce surface tension, allowing a free and perfect flow of the filler alloys.
Product |
Working Range °C |
Description |
SILFLUX 142 |
550 - 800 |
A specially developed flux used in conjunction with all CWB silver brazing alloys. Can be mixed into a paste by adding water. |
SILFLUX 142P |
575 - 825 |
Similar to Silflux 142 but as a ready mixed smooth paste. This Paste has superior time / temp stability and can be used with alloys melting below 800°C. |
SILFLUX 144 |
700 - 1000 |
This is a specially developed flux containing Boric Acid and Borax for the brazing and bronze welding of ferrous metals, copper bearing alloys and nickel bearing alloys. |
SILFLUX 145 |
550 - 650 |
A corrosive flux developed for the brazing of aluminium. Available in powder or paste form |
SILFLUX 146 |
560 - 580 |
Non-corrosive, non-hydroscopic aluminium brazing flux. For most aluminium alloys (Mg & Si <1%) and stainless steels. |
SILFLUX 147 |
150 - 450 |
Formulated for the soft soldering of stainless steel using Sil 96S solder. Flux is manufactured in a paste form with powerful deoxidizing action to give safe, secure joints |
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