How to Spot Weld Stainless

Spot welding is confined to a small area.
••• Weld image by Flutterby from

Spot welding is a popular way of joining two sheets of thin metal, such as stainless steel. The sheets are placed between the two welding electrodes, to which pressure is applied. Passing an electric current through the welding electrodes and the sheets of metal results in a high degree of resistance in the sheets of metal, meaning that enough heat is generated to melt the metal and join it together. The amount of current, the amount of time that current is passed through the electrodes and the pressure applied to the electrodes must be tailored to the material being welded.

    Position the stainless steel sheets to be joined, between the electrodes. Copper-cobalt-beryllium electrodes have an optimal tensile strength and electrical conductivity for welding stainless steel.

    Lower the upper electrode. Apply the clamping force to exert pressure on the metal sheets.

    Weld the sheets, for a predetermined amount of time, with a low-voltage, alternating current, using the manufacturer's specifications for the particular kind and thickness of stainless steel that you are welding.

    Remove the welding current. Hold the clamping force in place for a predetermined time, according to the manufacturer's specifications.

    Raise the upper electrode, freeing the welded stainless steel.

Related Articles

Disadvantages & Advantages of Spot Welding
How to Spot-Weld Aluminum
How Do Piezoresistive Pressure Sensors Work?
How it Works: Voltage Relay
How to Convert a Load to PSI in a Tensile Test
Characteristics of Aquatic Plants
What Is the Polarization Index?
How to Test Electrical Conductivity
Test Your Knowledge on Middle School Science
How to Spin Weld on a Water Tank
How to Store Energy by Using Dynamo
How to Calculate Load Current
How to Weld Inconel
How to Find Standard Deviation on a TI 84 Plus
How to Convert 12 Volt Alternator to 120 Volts
How to Weld Steel Pipes
Difference Between 316 & 308 Stainless Steel
How to Find a Z Score
The Advantages of Soldering

Dont Go!

We Have More Great Sciencing Articles!