How do we know which MMAW to select for welding of the various types of steel?
About 85% of the total metal produced is steel. Steel is an alloy of Iron and Carbon, but steels most often contain other metals such as Manganese, Chromium, Nickel etc. and non metals such as Carbon, Silicon, Phosphorous, Sulphur and others. The first rule of welding and selection of electrodes is “know the metal being welded.” There are so many different types of steels that it can be quite confusing. There are structural steels, cast steels, low-alloy high strength steels etc. There are carbon steels, chrome-manganese steels, chrome-moly steels etc. The best way to identify a steel is by the chemical composition and mechanical and physical properties. Therefore, it is best to obtain the specification of the steels that are to be welded.
