National standard of People’s Republic of China GB/T 9438-1999 Aluminum alloy castings Issued by National Quality Technology Supervision Bureau Preface This standard is the revised edition of GB/T 9438-1988 by absorbing scientific research achievements and practical experience in production in casting aluminum alloy since a decade ago and taking reference of advanced foreign standards and relevant standards in domestic aviation industry sector, including ASTM B26/B26M-92a Standard Spec