File:Pipe root weld with HAZ.jpg

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Summary

Description 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 innocuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006.
Date 2 February 2006 (original upload date)
Source No machine-readable source provided. Own work assumed (based on copyright claims).
Author No machine-readable author provided. Ytrottier assumed (based on copyright claims).

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 color you can see the transition of all the colors and corresponding temperatures. 

Temperature C     And          Color              
    204.4                     Faint Straw
    226                       Straw
    246.1                     Deep Straw
    282                       Bronze
                           Peacock
    590                       Full Blue
    640                       Light Blue

Licensing

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2 February 2006

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Date/TimeThumbnailDimensionsUserComment
current05:14, 4 March 2008Thumbnail for version as of 05:14, 4 March 20081,380 × 2,304 (363 KB)imagescommonswiki>XcepticZPCrop 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.

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