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Welding carbon steels -1

Welding carbon steels -1

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Question: Ed, in our shop when welding carbon steels we have a choice of either MIG, pulsed MIG, metal cored, self shielded flux cored, all position gas shielded or flat position flux cored wires. I would appreciate guidelines on when or where to use these processes and consumables. We weld thin gage to 1/2 (12mm).

Answer: For welding carbon steels, the following weld process logic guidelines
would apply;

For all welds made in the vertical, flat, and horizontal positions, on applications less than 0.080, <2mm, traditional MIG short circuit with an 0.035 (1 mm) weld wire is well suited. With short circuit transfer (wire feed 200 to 350 ipm or 10 to 12 o'clock and voltage in the 16 to 20 volt range), the low volts / amps and arc on / arc off characteristics, provides low weld energy which reduces weld burn through potential and provides low distortion potential. Best weld position "vertical down".

Note 2006. After 20 even Miller and Lincoln have now figured out how to build decent, pulsed MIG equipment. I can now recommend pulsed MIG for most thin gage applications.


For welds on parts 0.080 to 0.150 thick, the pulsed mode with an 0.045 (1.2 mm) MIG wire can provide many benefits for all steels and especially sluggish applications like stainless or nickel alloys. However in this application range, steels and stainless are also readily welded with an 0.035 (1 mm) electrode and traditional high short circuit settings. Controlled globular transfer or low spray transfer settings with the 0.035 and 0.040 wires are also excellent. 

Hits:  UpdateTime:2014-05-06 15:10:49  【Printing】  【Close
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