Education

ESAB Knowledge Center

Since Oscar Kjellberg's invention of the covered welding electrode in 1904, ESAB has played an integral part in the discovery and development of more commonly accepted welding processes than any other company.

ESAB's Knowledge Center contains a vast amount of information for the welder, the engineer, the welding inspector and the project manager.

Electrogas Welding

Electrogas welding is a development of electroslag welding and resembles it in terms of its design and use. Instead of slag, the electrode is melted by an arc which burns in a shielding gas, in the same way as in MIG/MAG welding. This method is used for plate thicknesses of 12-100 mm and weaving is used for the thicker materials. The joint is usually a simple I-joint with a gap. V-joints are also used. When welding vertical joints - on large tanks, for example - large cost savings can be made compared with manual MIG/MAG welding.

As in all other types of gas metal arc welding, solid or cored wire electrodes are used. The same types of shielding gas are also used. Compared with electroslag ...

Electrogas welding is a development of electroslag welding and resembles it in terms of its design and use. Instead of slag, the electrode is melted by an arc which burns in a shielding gas, in the same way as in MIG/MAG welding. This method is used for plate thicknesses of 12-100 mm and weaving is used for the thicker materials. The joint is usually ...

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An Introduction to Welding Inspection

Many characteristics of a weld can be evaluated during welding inspection, some relating to the welds size, and others relating to the presence of weld discontinuities. The size of a weld can be extremely important, as it can often relate directly to the weld's strength and associated performance, undersized weld's may not withstand stresses applied during service. Weld discontinuities can also be important. These are imperfections within or adjacent to the weld, which may or may not, dependent on their size and/or location, prevent the weld from meeting its intended performance. Typically these discontinuities, when of unacceptable size or location, are referred to as welding defects, and ...

Many characteristics of a weld can be evaluated during welding inspection, some relating to the welds size, and others relating to the presence of weld discontinuities. The size of a weld can be extremely important, as it can often relate directly to the weld's strength and associated performance, undersized weld's may not withstand stresses applied ...

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Can I Weld Aluminium to Steel?

Q: Can I weld aluminium to steel with the GMAW or GTAW welding process? 

A:  While aluminium can be joined to most other metals relatively easily by adhesive bonding or mechanical fastening, special techniques are required if it is to be arc welded to other metals such as steel. Very brittle intermetallic compounds are formed when metals such as steel, copper, magnesium or titanium are directly arc welded to aluminium. To avoid these brittle compounds, some special techniques have been developed to isolate the other metal from the molten aluminium during the arc welding process. The two most common methods of facilitating arc welding of aluminium to steel are bimetallic transition inserts ...

Q: Can I weld aluminium to steel with the GMAW or GTAW welding process? 

A:  While aluminium can be joined to most other metals relatively easily by adhesive bonding or mechanical fastening, special techniques are required if it is to be arc welded to other metals such as steel. Very brittle intermetallic compounds are formed when metals such ...

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Four Steps to Proper Nozzle Selection

Choose One-Piece or Two-Piece Nozzle: Acetylene - one-piece nozzle always. Other Fuel Gases - two-piece nozzle provides most efficient operation for normal cutting. One-piece nozzle extends life where heating is very severe. Choose Series: ANM, ANM-E, PNM, PNM-E, AFN nozzles. Elite 6 combination torch, DH Elite, and NM cutters. Choose Preheat Capacity: Choice of nozzle depends on preheat capacity. Steel coated with rust and scale, as well as bevel cutting, requires heavy preheat. Choose Size: Select size recommended for thickness of steel to be cut. Oversize nozzles waste gas. Use oxygen pressure recommended for nozzle. Nozzle Selection ANM PNM® Cutting Nozzles Hard drawn, electrolytic, ...

Choose One-Piece or Two-Piece Nozzle: Acetylene - one-piece nozzle always. Other Fuel Gases - two-piece nozzle provides most efficient operation for normal cutting. One-piece nozzle extends life where heating is very severe. Choose Series: ANM, ANM-E, PNM, PNM-E, AFN nozzles. Elite 6 combination torch, DH Elite, and NM cutters. Choose Preheat Capacity: ...

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MIG Wire Selection Guide

Weldability Welding performance of a MIG wire is described by the following:

Weld metal soundness Weld puddle fluidity Bead shape and edge wetting Spatter tendency Weld Metal Soundness Soundness in weld metal is characterized by a lack of porosity, good fusion, and freedom from cracking. Porosity, the most frequently cited cause of poor weld soundness, is caused by excess oxygen from the atmosphere, the shielding gas, and any base plate contamination combining with carbon in the weld metal to form bundles of carbon monoxide (CO) gas. Some of the CO can become trapped as the weld cools forming pores called porosity. Typically, the MIG wire process is recognized as having very low ...

Weldability Welding performance of a MIG wire is described by the following:

Weld metal soundness Weld puddle fluidity Bead shape and edge wetting Spatter tendency Weld Metal Soundness Soundness in weld metal is characterized by a lack of porosity, good fusion, and freedom from cracking. Porosity, the most frequently cited cause of poor ...

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How to Troubleshoot Plasma Cut Quality

Introduction Like any cutting process, there are a lot of variables that affect plasma cut quality. Some of these variables include:

Torch Type Torch Alignment Condition of consumables Arc Voltage, or cutting height Gas Type Gas Purity Gas Pressure and Flow Material Thickness Material Composition Surface Condition Cutting Amperage Nozzle orifice size Cutting speed (i.e. Machine travel rate) Most of these variables are interdependent, meaning that if you change one variable, it will affect the others. Figuring out how to fix cut quality issues can be difficult, so the following information was assembled to provide the usual solutions to some typical cut quality problems. ...

Introduction Like any cutting process, there are a lot of variables that affect plasma cut quality. Some of these variables include:

Torch Type Torch Alignment Condition of consumables Arc Voltage, or cutting height Gas Type Gas Purity Gas Pressure and Flow Material Thickness Material Composition Surface Condition Cutting Amperage Nozzle ...

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Training

At ESAB, we believe we can only achieve excellence by supporting our products and services with top quality training. Our training programs include a range of options, all of which offer opportunities to increase machine knowledge, safe operating techniques, and maximise machine productivity. Our course offerings combine instructor-led training with hands-on learning, as well as customised programs, for equipment operators and service technicians. ESAB's modern training facilities offer the best possible training environment using state of the art computer technology.

For course overviews and details on training sessions offered, check out our training calendar.


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