How to MIG Weld for Mild Steel
Mild steel, the common term for low carbon steel, is used for fabricating metal items such as vehicle trailers and industrial shelving. This type of steel is relatively inexpensive and is easier for beginner welders to learn to weld. Metal inert gas (MIG) welding, a common welding process using an electrical arc from a wire electrode, is typically used to fuse mild steel together. Unlike Oxy-acetylene welding, MIG welding requires the use of an inert shielding gas to protect the weld site from contamination.
Things You'll Need
- MIG welding machine
- Steel welding wire
- CO2 or AR/CO2 shielding gas
- Mild steel sheets
- Clamps
- Wire brush
- Protective gloves
- Welder's mask
Instructions
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Prepare the MIG welding machine by loading the wire feeder with a spool of steel MIG wire and attaching a tank of CO2 or AR/CO2 shielding gas.
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Clamp the mild steel sheets in place. Clean the edges with a wire brush to remove any dirt or corrosion.
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Place the tip of the welding torch at a 45 degree angle 1/8-inch above the welding seam. Press the torch trigger to create an arc.
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Slowly move the tip of the welding torch in a zig-zag pattern along the welding edge to melt the metals together and create a permanent bond.
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Continue this welding process until you reach the end of the welding seam. Hold the torch at the edge for an extra few seconds in order to create a pool of molten steel to fill in the edge of the sheets.
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Tips & Warnings
Always wear protective gloves and a welder's mask while working.
Weld in a well ventilated area.
Do not weld near flammable materials.
References
- Photo Credit Jupiterimages/Photos.com/Getty Images
