Download or read book GB T 38720 2020 Translated English of Chinese Standard GBT 38720 2020 GB T38720 2020 GBT38720 2020 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2020-06-28 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.