MIG Welding Techniques For Stainless Steel

The techniques used for welding stainless steel, or nickel-based alloys, are almost the same as for carbon steel.

There are some important factors that must be considered when it comes to the techniques used and the transfer type for stainless is always globular, or spray, transfer. There are two reasons for using this transfer type. You can also get the best Quality of Metal Fabrication in Sydney via Medina Engineering Pty. Ltd.

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First is that the shielding gas used for this metal always has a high percentage of argon gas which means a hot fluid-like arc with the characteristics that work best with spray type transfers.

Globular is a spray transfer type with the main difference being that the electrode turns into globs and then drops into the joint. Both these transfers work well on nickel-based alloys, but true spray transfer is best used on thicker metals.

The second is spatter. Spatter on stainless is extremely difficult to clean because it is welded to the metal. When it comes to the spatter it is almost always removed with grinding. It is rare to find the spatter easily to chip or knock-off. Distortion must always be controlled with the use of bracing and inter-pass cooling.

Bracing needs to be used to restrain the joint. In most cases, the use of clamps on cross members will do the job. Inter-pass cooling techniques are a must.