5 ways to join metal together

5 ways to join metal together
September 30 05:55 2017 Print This Article

There are five main methods of joining metals together, so let’s look at the characteristics of each.

Image Credit

1. Soft soldering

Solder is usually a mixture of tin and lead. The point of solder is that it has a lower melting temperature than the two base metals you are joining together. Soft soldering is the traditional workbench method, using an electrical soldering iron. Surfaces have to be prepared before soldering to ensure that they are clean and free from grease or dust.

Soft soldering is often used for small repair jobs such as parts inside television sets.

2. Hard soldering or brazing

In hard soldering you use an oxy-acetylene welder to melt the solder. Hard soldering is often used for larger joints such as the connection between underground pipes. The alloy used to join the metals consists mostly of brass and melts at much higher temperature than soft solder. It produces a stronger joint. The flame is moved around the weld in a process called “Tinning”.

Image Credit

As long as the tip of the soldering iron is clean, the heat causes the base metal and the bronze filler metal to fuse.

3. Brazing flux

Metal oxides produce oxygen during heating and this can degrade a joint, or even make a weld impossible. Flux can dissolve the oxide and can itself take the form of a gas, granules, liquid, powder or paste. The type of flux you need to use depends on the metals being joined. The simplicity of powerful metal bonding adhesives from http://www.ct1ltd.com/ provide an attractive no-fuss alternative!

4. Riveting

When heavy metal sections need to be joined together permanently, riveting is used, so you’ll find rivets in boilers, metal tanks, bridges and other installations. Most rivets are made of steel or wrought iron. The rivets are either punched through the metal sheets or drilled in. These processes cause heat and afterwards, as the rivets cool, they pull the metal sheets closer together.

5. Welding

When two similar metals are welded together, the welding material must be a metal or alloy that has a lower melting point than the metals that are going to be welded. Welding is a large and complex area in which the slope and angle of the weld have to be calculated, and different welding positions adopted.


view more articles

About Article Author

Clare Louise
Clare Louise

View More Articles