Spot Welding Stainless Steel Sheet

Accidental contact of elec trode to metal objects can cause sparks explosion overheating or fire.

Spot welding stainless steel sheet.

For mig welding stainless steel a shielding gas mixture that s 90 percent helium 7 5 percent argon and 2 5 percent carbon dioxide is generally ideal. Sparks can fly off from the welding arc. Resistance spot welding is widely used in sheet metal fabrication as an important metal joining process. It should be obvious even to the causal observer that if you put 2550 degree liquid steel over a galvanized coating that boils at 1350 degrees f.

For most jobs welding stainless steel you ll want to use 030 inch diameter stainless steel welding wire. The flying sparks hot workpiece and hot equipment can cause fires and burns. To weld sheet metal with solid wires use electrode positive ep or reverse polarity. Weld time and or weld power need to be increased to spot weld galvanized steel.

The sheets are placed between the two welding electrodes to which pressure is applied. Key words resistance spot welding stainless steel dissimilar metal welding optimization failure analysis mechanical properties microstructure. It has got lot of applications in the field of automobile industries. I seldom use my spot welder but for certain situations it is the right tool for the job.

When mig welding galvanized steel the weld puddle is 2550 degrees f. For thicker base pieces step up to 035 inch to 045 inch welding wire. While joining sheet metal is the most common use for the process resistance welding rw equipment actually can be used for a large variety of joining and heat treating projects some of which are not so well known. Passing an electric current through the welding electrodes and the sheets of metal results in a high degree of resistance in the sheets of.

There are some goo. The balance between the cr and ni mn is normally adjusted to provide a microstructure of 90 100. With these materials use a tri mix gas 90 helium 8 argon and 2 co 2. To most manufacturers spot welding is the most economical way to join two pieces of sheet metal.

Post weld heat treatment to soften and toughen the weld. Welding of steel is done at 2550 degrees f. Spot welding is a popular way of joining two sheets of thin metal such as stainless steel. Check and be sure the area is safe before doing any welding.

Darkmoon metals is a home based business start up i have dec. 3 3 austenitic stainless steel the austenitic stainless steels contain 16 26 cr 8 24 ni mn up to 0 40 c and small amounts of a few other elements such as mo ti nb cb and ta. Jeff explains spot welding and gives a short demo welding stainless steel sheet.