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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Consumables Corner: Pinning down the cause of porosity in SAW

June 23, 2014

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Q: Our company produces large structures fabricated from mild steel plate with a small amount of HSLA forgings ranging from 0.5 in. to 4 in. thick. Our main process is submerged arc welding (SAW) using a mild steel electrode and a neutral-bonded flux. We have been experiencing some issues with...

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Consumables Corner: Reducing weld cleanup in pulsed GMAW

June 20, 2014

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Q: Our company manufactures the main structures used to build fitness equipment. These structures are mild steel tubing of various shapes and sizes and in relatively thin material, typically 10 to 16 gauge. We are using 90 percent argon/10 percent CO2 shielding gas with a 0.035-in.-dia. ER70S-3...

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FAB 40: Merrill Fabricators’ welding school fuels local talent base

June 19, 2014

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Merrill Fabricators takes an innovative approach to the skilled labor crisis, by launching and growing its own welding school not only to fill its own ranks, but also to help grow the broader manufacturing community.

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Consumables Corner: Eliminating porosity in submerged-arc welding

June 19, 2014

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Q: Our shop manufactures bridge and structural steel components. Most of the material is A36 or A572 and welded with E70X-X class electrodes using FCAW with 75 percent Ar/25 percent CO2 shielding gas (bottle-supplied) and SAW. We're having issues with porosity in our SAW process. We find that once...

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Consumables Corner: Longitudinal cracking: A check list for prevention

June 18, 2014

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Q: We are welding several fabricated parts made from A514 (T1) steel using an AWS A5.29, 3/32-in-dia. E110 FCAW electrode. On one particular part we are experiencing longitudinal weld cracking. The structure is a 4-in. plate with a square cut out of the center and a 1.5-in. plate welded back in its...

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Welding outfit tote allows easy access for regulator pressure adjustment

June 17, 2014

Uniweld offers the 511 Cart welding outfit tote. Designed to allow easy access for regulator pressure adjustment, it is equipped with a center-balanced handle for carrying. The tote includes a dedicated hose winder and large storage compartment for accessories on the front. Storage slots hold...

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Consumables Corner: Addressing cracking on free-machining steels

June 17, 2014

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Q: We are a small company that fabricates and welds various parts and products for numerous companies. One of our customers is supplying us with parts for a particular weldment. All of the individual parts are made from A36 steel except for one, which is made from 12L14 steel. We are using GMAW...

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Consumables Corner: Identifying pockmarking causes in structural SAW

June 16, 2014

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Q: Our company manufactures various structural components, typically made from A36 or A572 steel grades in plate, I-beam, or channel. Based on the application we’ll use GMAW, FCAW, or SAW. On random occasions we experience pockmarking on the surface of the SAW joints. While the timing is usually...

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No secret code for successful code welding

June 16, 2014

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Being a code welding shop with an ever-expanding customer base continuously challenges Andy J. Eagan Co. Inc., Grand Rapids, Mich. New customer projects and keeping on top of certification demands require a talented and dedicated workforce. As a result, that’s where the company puts a lot of its focus.

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Consumables Corner: The thought process behind changing a weld process

June 13, 2014

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Q: Our company is using 0.045-in.-dia. mild steel solid wire for GMAW with 90 percent argon/10 percent CO2 shielding gas. A majority of our base metal is ¼ to 1 in. thick welded out of position about 30 percent of the time. We are considering a change in our welding process to reduce lead-times....

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Old-school welding techniques with new-school machines

June 12, 2014

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TIG welding thin material presents some challenges that can be addressed by tried-and-true techniques and newer welding technology.

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Consumables Corner: Tackling root penetration problems

June 12, 2014

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Q: We are experiencing weld root penetration issues in our single- and multipass welds. Our base metal is A36, and we oxyfuel-cut it in thicknesses from ½ to 3 in. Most of the weld joints are standard T-joints with a few groove joints. We are using a 0.045-in.- dia. E71T-1C/M flux-cored wire with...

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Consumables Corner: Examining the root cause of distortion

June 11, 2014

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Q: We manufacture hydraulic cylinders. Ever since we changed our shielding gas blend, we’ve noticed a higher level of distortion. Before the change we used a 95/5 blend, but now we use 92/8, which we have documented using a 0.045-in.-dia. filler metal. Would the 92/8 blend run hotter and cause...

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GMAW guns are custom-built by users

June 9, 2014

Bernard has announced the availability of Best of the Best (BTB) Platform GMAW guns. Users build the semiautomatic, air-cooled GMAW guns by choosing from an expanded list of features from the legacy Bernard Q-Gun™, S-Gun™, and T-Gun™ GMAW gun lines. The company has consolidated the top...

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GTAW outfit comes with hundreds of options

June 4, 2014

CK Worldwide Inc. offers the Professional TIG Outfit (PTO). According to the company, the outfit includes in one box everything users need to begin their welding process. Hundreds of options are available, giving users the GTAW torch of their choice, with power cables, DINSE connector, argon...

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