If they are the same size then find a rod that fits inside them or a pipe that fits the outside and use two bolts in each tube thru the pipe.
How to connect two pieces of sheet metal.
You want to have a smooth surface without any burrs or bumps.
Over lap the pieces a couple of inches if they slide together and bolt them together.
And the two pieces must be able to connect without any gaps.
Plug in the soldering iron and let it heat up.
Wipe away the dust.
However the folding or tab joint operation does not guarantee full positioning and additional auxiliary positioning is required.
How to bond metal to metal without soldering.
Get 2 screws and matching nuts drill 2 holes and pu the nuts on then 4 extra support maybe duct tape orwell idk thats my answer.
And 2 pan head rivet.
Read down below to find out how to join two pieces of metal without welding.
In the meantime lightly sand the edges of the metal where they will be joined.
A rivet consists essentially of three parts the head the two types of rivets.
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Wash the metal pieces with trisodium phosphate or another industrial strength cleanser if.
Some of these alternatives to welding methods require heat while some don t require heat at all.
This assembly method is relatively simple and convenient and can complete rapid assembly.
The two pieces of sheet metal connected to each other by folding or bending tabs in the form of a buckle and a clamping slot.
This is probably one of the easiest methods of joining pieces of metal or anything together.
It is required specially in heavy sections such as bridge wagon tanker boiler etc.
Sand the area to be joined with fine sandpaper steel wool or emery paper to remove any surface oxidation or corrosion.
There are numerous methods for joining metals without welding.
Good information when installing your return air.
In engineering rivets are usually made of wrought iron or mild steel.
Light gauge sheet can also be joined by riveting.
Rivets are used when it is required to connect permanently two or more pieces of heavy section metal.