GB/T 4335-2013 Translated English of Chinese Standard. (GBT 4335-2013, GB/T4335-2013, GBT4335-2013): Determination of ferrite grain size for cold rolled low carbon steel sheetshttps://www.chinesestandard.net, 30.11.2019 - 26 sivua This Standard specifies the terms and definitions, samples and preparation, determination methods, test report and the like of ferrite grain size for cold rolled low carbon steel sheets. This Standard is applicable to the determination of ferrite grain size for cold rolled low carbon steel sheets whose carbon content are less than 0.2%. The determination of grain size for other metal materials whose grain shape is similar to the rating figure of this standard series can also be carried out by reference to this Standard. |
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according to Formula Appendix A Normative applicable approximately equal assessment average grain cross-sectional average intercept calculated according carbon steel sheets China circular measurement grid cold rolled low comparison method Determination methods Determination of ferrite different magnifications document dominant grain extensibility is approximately ferrite grain ferrite grain size field of view formulas of micro-grain GB/T grain cross-sectional area grain extensibility Grain size conversion grain size number grains per square Iron and Steel longitudinal low carbon steel magnification of 100 measurement line segment measurement method measurement of grain Micro-grain size number Modify Normative references number G number of grains number of sections Number-6 observation rating figure magnification reference magnification 100 relationship relevant data rolled low carbon rolling direction Samples and preparation Second standard rating size for cold square millimeters mm2 standard rating figure Table Terms and definitions Test methods test report third standard rating Three-circle section method Various calculation formulas