Lower limit of service temperature for 16MnR plates

2009-02-11View Original

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A question for a primary school student: Regarding the temperature range in which 16MnR steel plates can be used, some sources state it to be from -20° to 475°, while others say it is from -19° to 475°. There is no doubt regarding the upper temperature limit; it is the temperature range corresponding to the minimum allowable stress value listed in Table 4-1 of GB150； As per the provisions of GB150 4.1.7, the lower temperature limit should be \"higher than -20°\", so it should be -19°; however, some sources state that it is -20°. During a training course for pressure vessel design reviewers organized by the Boiler and Pressure Vessel Standards Committee, one of the examiners asked such a question: is it -20° or -19°?

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Lower limit of service temperature for 16MnR plates

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