Download or read book GB 10849 1989 Translated English of Chinese Standard GB10849 1989 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2019-11-30 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the classification principle and rating method for cast aluminum-silicon alloy modification. This standard applies to the evaluation of the metallographic structure of cast aluminum-silicon alloys that have undergone sodium modification and phosphorus modification.