Image:Pipe root weld with HAZ.jpg

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Summary

Partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visible because of the polished ends, even though it is generally inoccuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006.

Temper Colors

A method of checking temperature is by the temper colors: A given temperature will leave a distinct color corresponding to that temperature on a freshly filed surface. (It should be noted that the presence of alloying elements in the steel affects the colors formed, and some of the higher alloy steels have no temper colors.) This temperature range is very evident in the picture above, at the outside edge of the temper colour you can see the transition of all the colors and corresponding temperatures.

Temperature F     And          Colour              
    400                       Faint Straw
    440                       Straw
    475                       Deep Straw
    520                       Bronze
    540                       Peacock
    590                       Full Blue
    640                       Light Blue

Licensing

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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation license".

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File history

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	Date/Time	Dimensions	User	Comment
current	10:14, 4 March 2008	1,380×2,304 (363 KB)	XcepticZP	(Crop the wall on the sides that isn't necessary. Lightened up the dark ares, but kept colors exactly the same. Reduced jpg file size with no perceivable loss of quality. )
	01:48, 2 February 2006	3,072×2,304 (1.55 MB)	Ytrottier	(partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visibl)

File links

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Welding

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