Home / Standards / GB/T 9441-2009 GB/T 9441-2009 Abolished Metallographic test for spheroidal graphite cast iron 球墨铸铁金相检验 Standard Type GBT ICS 77.080.10 CCS J31 Status 废止 Issue Date 2009-10-30 Implementation 2010-04-01 Responsible Dept 国家标准委 Drafting Unit N/A