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** What is Welding II Learn how to weld II Basics of welding ** Welding is the process of joining of two similar metals or dissimilar metals by heating them to a suitable temperature with or without applying pressure and additional material. Without pressure and additional material we can do welding but without heat welding is not possible. So the main part of welding is heat. Additional metal ,also called filler metal, is added during the heating process to help bond the two pieces together. The melting point of the filler material is lower or similar to work material THERE ARE BASICALL TWO TYPE OF WELDING PRESSURE WELDING OR PLASTIC WELDING AND NON PRESSURE WELDING OR FUSION WELDING PRESSURE WELDING ALSO KNOWN AS THE PLASTIC WELDING AND NON PRESSURE WELDING ALSO KNOWN AS FUSION WELDING WHY THE PRESSURE WELDING KNOWN AS PLASTIC WELDING