ASME SECTION II A-2 SA-781-SA-781M-2007 标准规范下载.pdf

2007 SECTION II, PART A SA-781/SA-781M SPECIFICATION FOR CASTINGS, STEEL AND ALLOY, COMMON REQUIREMENTS, FOR GENERAL INDUSTRIAL USE SA-781/SA-781M (Identical with ASTM Specification A 781/A 781M-99a.) 1. Scope apply only when specified individually by the purchaser 1.1 This specification covers a group of requirements in the order. that are mandatory requirements of the following steel 1.3 The requirements of the individual material speci- casting specifications issued by ASTM. If the product spec- fication, and this general specification shall prevail in the ification specifies different requirements, the product speci- sequence named. fication shall prevail. 1.4 The values stated in either inch–pound units or SI ASTM Designation Title of Specification units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values state