Download or read book GB/T 9441-2021 Translated English of Chinese Standard. (GBT9441-2021) written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2020-06-06 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Document specifies the nodularity calculation, metallographic sample preparation, inspection rules, inspection items and rating charts, result representation and inspection report of spheroidal graphite cast iron. This Document specifies the methods for evaluating the microstructure of spheroidal graphite cast iron by visual method and evaluating the nodularity of spheroidal graphite cast ion by computer image analysis software.