Braze vs. Weld

More short videos at http://www.gsegmedia.com. A frequent question is what is the difference between brazing and welding. This short video demonstrates gas welding and brazing mild hot rolled steel.

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  Autos & Vehicles

[triumph bonneville]

Is there any way to join a piece of steel and a piece of aluminum?

[897473]

There is probably a way but I don't work with aluminum. Check out some of the welding forums.

[Doug Ward]

Silver solder.

[897473]

I am not sure what your question is. There are better places to ask about silver solder. I use very little silver solder.

[1242chisox]

When i gas weld, the welds start out convex, then they go flat. What am i doing wrong?

[897473]

Difficult to say without seeing the weld.

Things you might check:

1) changing your speed of movement as you progress through your weld.

2) keeping the same distance between the torch and the metal.

3) Melting more or less gs rod as you move along the weld.

[Kevin Martin]

I've taken a steel mig filler to an aluminum plate before. It looks absolutely terrible, but I never tested the strength. It's possible to join them, but I wouldn't trust it worth anything.

[Doug Ward]

No question. Just a reply to bonneville. The only ways to join steel and aluminum with heat, that I know of, is low temp silver solder like Brownells sells. I suppose in Norf Karoleener duct tape would suffice. LOL

[897473]

I am not sure exactly which video you are referring to. Clean metal will always braze or weld better than rusty, oily or paint covered metal.

I do tend to clean up any metal before welding or brazing. It saves time in the long run.

[whyturtleracer]

George, thank you for sharing your knowledge with the rest of us. In your gas welding show and tell, were the subject pieces cleaned of the mill scale? I noted that you placed much importance on cleaning to bare metal for the braze example. When you get time.Andy