Plug weld:
A weld made by filling a hole in one component of a workpiece with filler metal so as to join it to the surface of an overlapping component exposed through the hole (the hole can be circular or oval).
2.1.2 FROM THE PENETRATION POINT OF VIEW
Full penetration weld:
A welded joint where the weld metal fully penetrates the joint with complete root fusion. In US the preferred term is complete joint penetration weld or CJP for short (see AWS D1.1.)
Partial penetration weld:
A welded joint without full penetration. In US the preferred term is partial joint penetration weld or PJP for short.
2.2 TYPES OF JOINTS (SEE BS EN ISO 15607)
- homogeneous joint: welded joint in which the weld metal and parent material have no significant differences in mechanical properties and/or chemical composition. Example: two carbon steel plates welded with a matching carbon steel electrode.
- heterogeneous joint: welded joint in which the weld metal and parent material have significant differences in mechanical properties and/or chemical composition. Example: a repair weld of a cast iron item performed with a nickel base electrode.
- dissimilar joint: welded joint in which the parent materials have significant differences in mechanical properties and/or chemical composition. Example: a carbon steel lifting lug welded onto an austenitic stainless steel pressure vessel.
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