Welding Stainless Steel – Tricks and Techniques

Welding Stainless steel is an interesting job to take on. It is a very exciting work as the welders face various challenges throughout the process. Apparently, to simplify the welding process and to make improved and enhanced welds, a welder should learn various tricks and techniques. It is also important to understand the different kinds of stainless steel and that their welding processes are not the same. In fact, there are three basic classes and one mixed class of stainless steel. They are named Austenitic, Ferric, Matrensic, and Duplex. Duplex is a mixed class of stainless steel. These classes are identified through their microstructures and metallurgical structures.

Basic Tips for Stainless Steel Welding

Welding steel can be very difficult if the welder is not familiar with the process. Read on and learn some basic techniques on how to weld a stainless steel.

When welding stainless steel, the first thing to do is clean the metal piece thoroughly. The trick is to use a wire brush and aggressively scrub the surface of the metal. It helps in removing the chromium particles that have been built up on the metal over time. It also helps in removing contaminants, grease, and dirt. A clean metal makes a good weld.

Another trick when welding stainless steel is the use of heat sink such as brass and aluminum. Attach the brass to the back side of the sheet of the weld. This process helps soaking up the heat and prevents burn through. The trick is to put minimal amount of heat into the layer of the weld. This ensures enough heat drops before starting the welding process. It also helps in completely welding the whole seam without breakage.

Another technique when welding stainless steel is when getting to the last part of the weld, hold off and wait until the weld pool stabilizes and hardens. Make sure also to use a frame to prevent the base from twisting. Using clamps, heat sinks, channels, or angle iron is very effective in preventing steel deformation.

Stainless Steel Welding – Austenitic Vs. Ferritic

The Austenitic steel has been classified by the American Iron and Steel Institute as the “300 series”. Generally, not all this kind of steel responds well to the welding process. It has a tendency for hot cracking which makes it difficult and time consuming to weld.

On the other hand, the ferritic steel responds well with the arc welding procedure. It is usually used for car exhaust systems. It is also easier to weld as this material does not tend toward hot cracking. This material makes a good weld.

There are many things that need to be considered when welding stainless steel. The information provided here is just a small part of what is needed to make a really good welding job.