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This document defines common welding terms and symbols used in fabrication and engineering industries. It discusses different types of welds like butt welds and fillet welds. It describes parts of welds like the weld face, root, and heat affected zone. It also covers weld sizes, positions indicated by numerical codes, and the use of welding symbols on drawings to convey essential joint information in a standardized way. - Download as a PDF or view online for free

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plug and slot welds are commonly used on what joint Giới thiệu trò chơiplug and slot welds are commo

f. Slot Weld Dimensions. Dimensions of slot welds must be shown on the same side of the reference line as the weld symbol (fig. 3-37).

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Asme v Article 4 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document provides requirements for ultrasonic examination methods for welds. It outlines general requirements including following written procedures, equipment specifications, and calibration block usage. The written procedure must specify essential variables like weld configurations, examination techniques and angles, and search unit details. It also provides a table outlining which procedure elements are considered essential or nonessential variables when qualifying examination procedures.

This document discusses welding symbols and their elements. It covers elementary weld symbols like square groove welds, single V groove welds, and fillet welds.

Slot weld symbols will have the number of slots, the width and length of the slot, and the center-to-center spacing between welds.

Microstructural analyses of the parent pearlitic and bainitic rail steels were performed, and the results were compared with the microstructure of the welded pearlitic and bainitic steels. An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot welds was observed. The microstructural features that were identified in the weldment of both slot-welded steels were very similar. This was expected since the same welding wire was used to weld both rail steels. The weld consisted of mainly ferrite and had similar grain size. The fusion zones of the welded pearlitic and bainitic rail steels were examined after flexural tests to determine if there were any cracks present due to improper or weak fusion. Examination of the entire fusion zone under high optical magnification revealed no cracks, indicating that a perfect fusion was achieved. The three-point flexural behavior of the parent pearlitic and bainitic steels was evaluated and compared with that of the slot-welded steels. It was found that that the welded pearlitic steel has superior fracture resistance properties when compared to the parent pearlitic steel. The average fracture resistance of the parent pearlitic steel was 79 MPa√m compared to 119 MPa√m for the welded pearlitic steel. The slot-welded bainitic steel, however, showed similar fracture resistance properties to the parent bainitic steel with average values of 121 and 128 MPa√m, respectively. The failure mechanism of the welded and parent pearlitic and bainitic steels was also identified. Microvoid coalescence was observed in both welded rail steel samples. This was manifested by dimpled features, which are associated with ductile failure.