Arc Welding

The arc welding technology area focuses on the most commonly used arc welding processes, mainly GMAW/MIG, GTAW/TIG, SMAW/stick, and plasma. The articles and press releases cover processes and power sources, plus all of the related items—electrodes and wire, wire feeders, fixtures, manipulators, positioners, and power sources. If you need information on personal protective gear, ventilation systems, and safety practices for welders, see our Safety coverage area.

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Arc Welding 101: Sorting out SAW

October 8, 2014

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Q: What is the procedure qualification test for manufacturing pipe using submerged arc welding?Sandesh P. A: Pipe is manufactured by one of these four methods: electric resistance welding (ERW)/high-frequency induction (HFI) welding, seamless (plug/mandrel mill and extrusion), spiral welding, and...

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Ready Welder secures GSA contract

October 7, 2014

Ready Welder Corp. has been awarded a GSA Schedule 51-V contract (GS-21F-129BA) and now is certified to supply its portable battery-powered GMAW machine and supplies to the federal government through its electronic ordering system, GSA Advantage!® "Securing this GSA Schedule expands our public...

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Arc Welding 101: Satisfying the weld inspector

October 7, 2014

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Q: We have a stiffener bar (continuity connection) in a column that calls for AWS D1.1 BTC-P4 for the flanges and fillet welds on both sides in the web. The stiffeners were field-welded. After assembling 35 connections, we discovered no fillet weld on the bottom side in the web. We can’t weld the...

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Arc Welding 101: What's up with a WPS?

October 6, 2014

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Q: Do I need a welding procedure specification (WPS) for my company when it is just me and all I do is on-site portable welding of a wide range of items?Steven B. A: Whether your company requires a WPS depends on the customers you serve. For example, if your company is hired to fabricate your...

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Arc Welding 101: Vertical-up or -down in robotic welding?

October 3, 2014

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Q: We have a weldment that incorporates 0.375-in.-diameter steel rods and a 0.060-in.-thick sheet metal stamping of 1018 CR material. Each weld is the same, 0.75 in. long with a 0.25-in. fillet, perhaps including weaving. The assembly is fixture and welded robotically using GMAW with CO2 gas and...

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Arc Welding 101: Clearing up ASME B31.3

October 2, 2014

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Q: I am unclear about a section relative to the ASME B31.3 code for chemical plant piping.The area of this code referring to the type of welding process that is acceptable—328.2.2—states welding procedures qualified by others may be used, provided that the following conditions are met: The...

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Arc Welding 101: Tackling trim in pulsed MIG welding

October 1, 2014

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Q: We use the pulsed-spray-transfer GMAW process in our shop. When setting weld voltage, we can adjust the trim between 0.5 and 1.5. What do those numbers mean, and how do they relate to weld voltage?Corey G. A: Pulsed-spray-transfer welding equipment has challenged the conventional wisdom we’ve...

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Arc Welding 101: Which welds need visual inspection?

September 30, 2014

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Q: We work on off-road and lifting equipment, and our welders are qualified per AWS D1.1. Which welds are required to be inspected visually and by whom?Ed Z. A: When you asked which welds are required to be inspected visually, I had to snicker. There was a time in my life when one side of my hard...

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Arc Welding 101: Addressing linear porosity

September 29, 2014

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Q: We are experiencing linear porosity at the furthest point of penetration when welding heavy plate. The porosity is 0.3 mm dia., but it occurs regularly in every weld we’ve sectioned so far.We are using a semiautomatic spray transfer process with a 0.045-in. ER70S-6 electrode, and a shielding...

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Arc Welding 101: Three keys to a successful CWI

September 26, 2014

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Q: I was recently interviewed by a writer who was researching how welders make the transition to certified welding inspectors (CWI). One of the questions he asked was, “What key skills make for the best certified welding inspector?” A: Communication—written, photographed, or verbal—is the...

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The art of welding versus welding art

September 25, 2014

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How do you make those sculptures? How can I make them? Not easy questions to answer, but not for the reasons you may think.

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Consumables Corner: Selecting filler metals for stainless steel welding

September 23, 2014

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Q: We're a midsize job shop that manufactures a wide variety of products from various types of metal. Currently we have a project that requires welding 304L to 316L stainless steel and welding both of these alloys to A572 Grade 50 steel. Some of the welds are structural and some are used in...

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Arc Welding 101: Globular-transfer mode for MIG

September 23, 2014

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Q: I am employed as an AWS D.1.1-qualified welder at a machine shop. I was wondering why you can certify on 75 percent argon/25 percent CO2 when you are not allowed to use a short-circuit transfer on materials over 3/16 in. You need at least 83 percent argon to obtain a spray transfer, yet I passed...

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ESAB celebrates 110 years in business

September 15, 2014

ESAB Welding & Cutting Products, a manufacturer of arc and gas welding equipment, manual and automated plasma cutting products, CNC cutting systems, welding automation and robotics, welding consumables, accessories, and PPE in Florence, S.C., marks its 110th anniversary in September 2014. In...

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Inverter-based power source designed for high-productivity welding

September 12, 2014

ESAB Welding & Cutting Products will display the Aristo® Mig 4004i Pulse power source at FABTECH. It can be combined with the Aristo Feed 3004 or Aristo Feed 4804 wire feeder to form a complete GMAW package. The feeds are offered with a choice of machine interface — the user-friendly U6 or...

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