Question: What Metal Does Solder Not Stick?

Can you silver solder with a propane torch?

An ordinary household propane or butane torch will work, but even better is one of the new torches that burn MAPP gas.

Most hardware stores have them.

They burn much hotter than ordinary torches, which makes silver soldering go faster and easier.

Use silver solder like ordinary solder..

What material does solder not stick to?

Solder simply will not adhere to dirty or oxidized metal surfaces. Clean any flat surfaces which are to be soldered with steel wool, a file, emery cloth, etc. It’s important to take time to clean the surface thoroughly.

Can I solder without flux?

It’s ok, if you can do it, but it’s very difficult to solder without flux. The flux breaks down the oxide layers on the metal surfaces and allows the solder to “wet” them. If it doesn’t wet, it doesn’t make a connection. … It’s normally always necessary to use flux when you solder.

Can solder go bad?

Solder can definitely expire. This is because of the flux which can separate or in the case of solder paste dry out and become ineffective.

What is the best solder for steel?

SSF-6 is food grade and works equally well on stainless steel, brass, copper, cast iron, bronze, and chrome moly. Oxy acetylene is preferred when working on large pieces but you can use propane, mapp gas, or natural gas and oxygen for many repairs and joints.

Can I use Vaseline as flux?

Vaseline is an “oil” based grease, it has no flux properties. (It WILL do the opposite job of contaminating your joint.) … The trick with flux is not the “feel”, > smell, or taste, but the ability to carry heat.

How do you get solder to stick to steel?

Melt some solder onto the non-steel metal if you’re using one. If you’re binding a different metal to the steel, like copper or tin, pre-treat the surface by melting some solder onto it. This gives the steel a surface to bind to. Heat up the metal with your soldering iron or torch until it’s hot enough to melt solder.

How do I get a shiny solder joint?

The most important thing is to have your tip tinned so that solder actually flows smoothly across the surface. The tip itself should be bright and shiny like the joints you’re trying to achieve, you can also get tinning compounds that make this job easier but you can get by without.

Does solder stick to aluminum?

Aluminum needs heat to accept solder, usually to the tune of 300°C or more. … Aluminum is a great heat sink, so the heat source will need to be even higher to get the aluminum up to the right temperature. Soldering aluminum is not like soldering copper; it’s not enough to just heat up and melt the solder.

Why does my solder ball up?

Solder balls are caused by gassing and spitting of the flux on the surface of the wave or by solder literally bouncing back from the solder wave. This is caused by excessive back flow in air or too high a drop in nitrogen environments.

Why is soldering so hard?

Soldering is a process somewhat like gluing, in that the solder has to form a tight bond between the parts. Just as clean parts glue better, they also solder better. Any mud, blood, beer, grease, oil, or especially oxidation will make the joint difficult or impossible to solder well.

Is solder as strong as welding?

Welding joints are the strongest, followed by soldered joints then brazed joints. Welding requires about 6,500 degrees Fahrenheit, while soldering requires about 840 degrees Fahrenheit. Workpieces and the metal base are heated and melted in welding. Soldering requires no heating of the workpieces.

Why does my solder not stick?

A classic reason solder won’t stick to something is because you’re not getting it hot enough. My interns come to me with this problem all the time. Make sure the tip of the iron is nice and shiny. Touch some solder on it, and it should melt almost instantly.

Will solder stick to steel?

You can even use solder to join copper or brass to stainless steel, you just need the proper flux. … If you must use a paste flux, use it sparingly. Use plumbing (silver) solder only. Do not use electrical or jeweler’s solder because these often contain lead or cadmium.