Another one recognised as reliable is Fluxite Soldering Paste, suitable for copper and brass .. actually most metals other than aluminium (although other metals would require different solders) and can be used with either lead or lead-free solders.

Alone, it’s not terribly strong, but it is capable of holding two pieces together quite well. Do do this, the two pieces to be joined should share as much surface area as possible. Don’t expect the solder to be strong if it is filling big gaps between the parts.

Take a carbide tip and grind the crack like a small groove. Flux it and remove any parts in the valve that can melt. Heat up the valve and apply solder; be careful how much solder you put in the opening because that solder can travel to an area where it affects the inside operation of valve.

How to Braze Brass to Brass

1. Use an oxyacetylene torch in most instances to weld brass.
2. Mix a paste of braze-welding flux and water and apply it to the surfaces that are going to be welded.
3. Lower the acetylene in the mix until you have a strong oxygen rich flame able to produce coating on the base metal.

Yes, solder can be used without flux. To do so, you will need something other than flux to break down the oxides on the metal surface, without which your surface may be damaged or not properly cleaned.

Muggy Weld carries two brazing solutions for brass soldering: Super Alloy 1 and SSF-6 Silver Solder. In this video, flux-coated SSF-6 is used to join two pieces of brass plates with an oxyacetylene torch. Begin by pre-cleaning the brass.

Solder adheres as well to brass as it does to copper, so the fittings are usually molded with slip joints so you can solder them to the pipes.

Brass is a metal. As for all metals, you’ll need a brand of glue that creates a chemical bond in order to glue pieces of brass together. When you need to glue brass, be sure not to choose a glue that is brittle or that expands.

Another option for gluing metal is Loctite Epoxy Weld Bonding Compound. A convenient alternative to welding, it’s the strongest solution for bonding most metals, including iron, steel, aluminum, brass, copper, and pewter.

The usual solder for brass is industrial quality silver solder; higher silver content. It does the soldering job fine, but the colour match is poor. very good colour match, much better than normal silver solder. 610-670C (1130-1238F) and it contains Cd.

Preparation. In order to get two pieces of brass to hold together,it is first necessary to clean both pieces thoroughly.

Removing Excess Solder. If there are any clusters or solder drips on the brass, use solder wick to absorb them. Heat the excess solder until it is just starting to melt and then place a piece of solder wick over it, and the wick will absorb the unwanted run.

Two answers here: Silver solder will stick to both brass and steel. Clean the two pieces to be joined with sandpaper. Brazing is stronger and less expensive than silver soldering. As above, but requires an oxy-acetylene torch and apply flux to the brass rod instead of the joint.