Download or read book GB T 9441 2009 Translated English of Chinese Standard GBT 9441 2009 GB T9441 2009 GBT9441 2009 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2016-05-21 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the method for assessing the microstructure of spheroidal graphite cast iron in optical microscopes. This standard specifies the methods for assessing spheroidizing grade, graphite size, number of nodular graphite, number of pearlite, number of ferrite in dispersed distribution, number of phosphide eutectic, and number of carbide; it lists out the corresponding standard figures.