Welding quality assurance and plasma arc welding
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Date
1995
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Publisher
University of New Brunswick
Abstract
Plasma arc welding can be applied in some applications of welding stainless steel as
an alternative to welding with the gas tungsten arc welding process. A quality weldment
however, must first be attained. Before using a new combination of welding variables a
welding procedure specification must be written and testing carried out.
Samples were fabricated using 1/8", 316L stainless steel pipe and plate and an
E316LT-1 filler electrode. Difficulty was encountered in welding pipe samples, however
experimentation with plate samples was successful. A rate of 10" per minute was achieved.
Since weldments would be used in an industrial setting, all testing performed
conformed to the American Society of Mechanical Engineers' ASME Boiler and Pressure
Vessel Code.
Four tension tests and four guided bend tests were performed with very good results.
The Charpy Impact Tests energy values were also acceptable but some values for lateral
expansion were not. Liquid penetrant and X-ray tests were also carried out with success.