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See Chinese contents: GB/T 34474.1-2017 GB/T 34474.1-2017: Determination of banded structure of steel -- Part 1: Micrographic method using standards diagrams
This Part of GB/T 34474 stipulates the method of evaluation of the hypoeutectoid steel banded structure (including ferrite band and the Class II structure banding) by the comparative method. This Part is applicable to the evaluation of the banded structure of hypoeutectoid steel after plastic deformation, but not to the evaluation of the banded structure of carbide band in hypereutectoid steel.
