Weldability Sif Technical Knowledge Database

Welcome to the Weldability Sif Technical Knowledge Database. We answer many technical questions daily in assisting customers with selecting and using our products in their applications. You can search these questions using the box below, to find the answers you seek.

A selection of popular questions and their answers:

Q. One of our suppliers uses your Rods : Sif silver Solder No 38 1.5mm in the manufacture of one of our parts. We are developing a new application and now need to confirm if this Silver Solder is suitable for Potable Water applications and complies with the UK WRAS requirements?

A. Please note that our Sif Silver Solder No38 contains Cadmium, and that we would not therefore recommend it for use in water-transport applications. We suggest that you switch to our Cadmium-Free Sif Silver Solder No39 38% Ag instead.

Q. Tig rod for welding/brazing material containing the following 97% cu,3% si,1%mn?

A. Sifsilcopper No.968

Q. Having problems welding 1.0mm soft Aluminium sheet,encountering melting-point issues?

A. Try an ethanol/water base to the paste rather than using a water-based paste or powder.Using ethanol can help to reduce the melting point by between 10-20 deg c. Sif flux No.36's melting point is around 580 deg c,but thin 1mm 4047 can be melting at about 565 deg c.

Q. Equivalent product to Eutectic Castotig 21?

A. Sifalumin No 15 4043

Q. Rod for brazing copper to copper?

A. Sifcupron No.17

Q. Melting point of Sifbronze No.1 brazing rod?

A. Approx 875c - 895c

Q. Rod forTig brazing brass?

A. Sifsilcopper No.968

Q. Rod for welding T45 Tubing?

A. Sifbronze No.101 using the Gas Fluxer process

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Weldability Sif Technical Knowledge Database