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GB/T 38720-2020 English PDF (GBT38720-2020)

GB/T 38720-2020 English PDF (GBT38720-2020)

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GB/T 38720-2020: Microstructure examination of medium-carbon steel and medium-carbon alloy structural steel after quenching
This Standard specifies raw materials and requirements, inspection requirements, quenching microstructure grade and evaluation for common medium-carbon structural steel and medium-carbon alloy structural steel. This Standard is applicable to inspection and evaluation of microstructure after parts quenching and tempering of medium-carbon structural steel and mediumcarbon alloy structural steel.

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