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说明总的说来,表中代号后第一组数字表示抗拉强度,其中GB、DIN及JIS的单位为kgf/mm~2,ISO为N/mm~2,1N(牛顿)=0.10197kgf;ASTM及BS都是英制,前者单位为ksi(每平方英寸千磅),1ksi=0.703kgf/mm~2,后者单位为每平方英寸吨(tf/in~2),括号内数字为换算成kgf/mm~2的值,以便比较。具体内容请查各项标准。DIN1691-64、1693-73的中译本可查北京石油化工总厂基本建设指挥部1978年编译的西德工业标准第十二分册“黑色金属材料”。
Description Overall, the first set of numbers following the code in the table indicates the tensile strength, with GB, DIN and JIS in kgf / mm ~ 2, ISO in N / mm ~ 2 and 1N (Newton) = 0.10197kgf; ASTM and BS are in inches, the former in ksi (thousand pounds per square inch), 1ksi = 0.703kgf / mm ~ 2, the latter unit is tons per square inch (tf / in ~ 2), the figures in parentheses converted into kgf / mm ~ 2 value for comparison. Please check the specific content of the standard. DIN1691-64, 1693-73 Chinese translation can be found in Beijing Petrochemical Plant Capital Construction Headquarters in 1978 compiled West German industry standard twelfth volume “ferrous materials.”