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Machinery and Production Equipment
News Release from: ESAB | Subject: OK 61.20, OK 63.20 and OK 67.53 electrodes
Edited by the Engineeringtalk Editorial
Team on 12 June 2007
Electrodes offer excellent arc control
A stable, soft arc at very low current and voltage makes ESAB's new electrodes suitable for both up and downhill welding of pipes with a wall thickness in the region of 2mm.
ESAB has introduced three new rutile MMA electrodes with excellent all-positions arc control at very low welding currents, the OK 61.20, OK 63.20 and OK 67.53 They have been developed in response to the increasing use of thin-walled stainless pipe and sheet to extend the life cycle of installations
This article was originally published on Engineeringtalk on 3 Jul 2008 at 8.00am (UK)
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A stable, soft arc at very low current and voltage makes them suitable for both up and downhill welding of pipes with a wall thickness in the region of 2mm.
The slag system allows a long pull-out length, reducing electrode change time loss.
Low spatter, good slag release and good wetting minimise time loss in post-weld cleaning.
Corrosion resistance meets the requirements of demanding environments found in, for example, the petrochemical and shipbuilding industries.
OK 61.20 is suitable for 14307 type austenitic stainless steels.
This electrode complements the OK 61.30 to cover very thin stainless steel.
It has been developed for AISI 304 types of austenitic stainless steel widely used in applications with a moderate corrosion resistance requirement.
OK 63.20 is used for 14404 type stainless steels (AISI 316) used in petrochemical plants and for marine applications.
In line with the parent material, it is alloyed with molybdenum to provide enhanced resistance to pitting corrosion in chloride-containing media, such as salt water.
Another major use is the welding of AISI 304L type stainless steel for similar applications, to provide a weld with a significantly higher corrosion resistance.
OK 67.53 is used for welding austenitic-ferritic (duplex) 14462 stainless steel applied extensively in the petrochemical and pulp and paper industry, shipbuilding and offshore construction.
It is particularly suitable for bridging large gaps in thin-walled material.
SMAW provides better economy compared to GTAW, mainly due to the avoidance of gas purching, related waiting times and associated gas costs.
The better welding economy makes MMA electrodes a popular choice for applications in thin-walled stainless steel. Request a free brochure from ESAB ...
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