| Best Brazing Practise |
| Silver Soldering Tips |
| Strength of Silver Solder Joints |
| Silver Solder |
| Silver Solder Fluxes |
| Soft Solder Fluxes |
| Flux Cleaning Salts |
| Boiler Fittings/Accessories |
| Cadmium Bearing Silver Solder & Fluxes |
| Cadmium Free Silver Solder & Fluxes |
| Soft Solders |
| Copper Phos Alloys |
| Silver Solders |
| Refrigeration |
| Welding Products |
| Sievert Propane Torches, Burners & Hearths |
| Hallmarking ? |
| Non Hallmarking |
| Joining Aluminium |
| Joining Brass |
| Joining Cast Iron |
| Joining Stainless Steel |
| Joint Cleanliness |
| London Jan 2011 |
| Myford Fair Sep 2010 |
| Harrogate May 2011 |
| Guildford Jul 2010 |
| Bristol Aug 2010 |
| Midlands Oct 10 |
| Society Presentations |
| References |
| What the professionals say |
Silver Solder
Contrary to the story circulated by some suppliers of silver solder, cadmium bearing alloys are not in short supply.
We have no knowledge of any european manufacturer ceasing production. Certainly our suppliers, having been asked, have not indicated such a move.
One supplier has apparently made a unilateral decision to stop supplying these alloys. We believe this decision is based more on their concern that distributors may not be exercising "due duty of care" with regard to their product rather than health & safety.
This respected and reputable company would no doubt have stopped supplies to the general public 38 years ago, when a potential danger was highlighted, had that been the case. Such is the danger that they are apparently not withdrawing this "health risk" until the end of 2009!
This situation re "due duty of care" does not arise with CuP Alloys. We believe we comply with all legislation demanded by the EU relating to the safe and efficient use of our products.
See the news item to the right of this leader for more information.
The most popular alloys are 842, 424, 440 and 456 and 840. All will produce strong, leaktight joints with small neat fillets.
All will join copper, brass, bronze, mild and stainless steel, nickel alloys in any combination
Your will make your choice based your considering the melting temperature or colour or alloy content or price.
It will not be based on joint strength. If used properly all will produce joints stronger than the parent materials.
If you feel that this range of alloys does not quite fit your requirements, look at the full range of silver solders in the "Industrial" section. We can normally arrange something to suit.
For flux details and prices visit "silver solder fluxes"
842
This is the alloy most widely used by the model engineer.
It contains 42% silver, cadmium and conforms to BS EN 1044 AG303
Melting Range 610 -620 °C
It is free flowing, offers excellent joint penetration and has the lowest melting range of all silver solders.
It is available as wire 0.5 & 0.7mm dia, rods 1.0, 1.5, 2.0, 2.5mm dia
424 contains 24% silver and is cadmium free.
Melting Range 740 - 780 °C It is often used in the first operation of step brazing when several joints are made in close proximity
It is available as rod 1.5mm dia. Its high melting point often requires the use of oxy-acetylene heating.
Use it with our HT5 flux
440 is another cadmium free alloy containing 40% silver. It conforms to BS EN 1044 AG105
Melting Range 650 - 710 °C
It is used as either the second of three or first of a two stage brazing operation.
Although it contains more silver, it offers considerable advantages in that it can be more readily melted with a propane torch and you can use the same flux as per 842. No duplication.
It is available as 1.0mm dia wire and as rod 1.5, 2.0, 2.5mm dia.
Melting range 620 - 655 °C.
It is the lowest melting range, cadmium free solder. It offers a reasonable colour match on stainless steel.
It is available as 0.8mm dia wire and rod 1.0, 1.5, 2.0, 2.5mm dia.
840 contains 40% silver and cadmium. It conforms to BS EN 1044 AG 304.
Melting range 595 - 630 °C.
Because of its wider melting range it offers better gap-filling qualities than 842.
It is available as 1.5mm dia rod (bare and flux coated), foil and paste.
All prices shown below are the total prices payable
There is no VAT or P&P to add
As with all silver solders, use them in well ventilated areas.
Do not overheat the alloy or flux. Refer to the section on Silver Soldering Tips and Health & Safety.
This is the alloy most widely used by the model engineer.
It contains 42% silver, cadmium and conforms to BS EN 1044 AG303
Melting Range 610 -620 °C
It is free flowing, offers excellent joint penetration and has the lowest melting range of all silver solders.
It is available as wire 0.5 & 0.7mm dia, rods 1.0, 1.5, 2.0, 2.5mm dia
424
424 contains 24% silver and is cadmium free.
Melting Range 740 - 780 °C It is often used in the first operation of step brazing when several joints are made in close proximity
It is available as rod 1.5mm dia. Its high melting point often requires the use of oxy-acetylene heating.
Use it with our HT5 flux
440
440 is another cadmium free alloy containing 40% silver. It conforms to BS EN 1044 AG105
Melting Range 650 - 710 °C
It is used as either the second of three or first of a two stage brazing operation.
Although it contains more silver, it offers considerable advantages in that it can be more readily melted with a propane torch and you can use the same flux as per 842. No duplication.
It is available as 1.0mm dia wire and as rod 1.5, 2.0, 2.5mm dia.
456
456 is cadmium free and contains 56% silver. It conforms to BS EN 1044 AG102.Melting range 620 - 655 °C.
It is the lowest melting range, cadmium free solder. It offers a reasonable colour match on stainless steel.
It is available as 0.8mm dia wire and rod 1.0, 1.5, 2.0, 2.5mm dia.
840
840 contains 40% silver and cadmium. It conforms to BS EN 1044 AG 304.
Melting range 595 - 630 °C.
Because of its wider melting range it offers better gap-filling qualities than 842.
It is available as 1.5mm dia rod (bare and flux coated), foil and paste.
All prices shown below are the total prices payable
There is no VAT or P&P to add
As with all silver solders, use them in well ventilated areas.
Do not overheat the alloy or flux. Refer to the section on Silver Soldering Tips and Health & Safety.
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