標準編號:	GB/T 1979-1980
中文名稱:	結構鋼低倍組織缺陷評級圖
英文名稱:	Diagram of a low magnification texture blemish grading of structural steel
中標分類:	H23    金屬工藝性能試驗方法
行業分類:	GB    國家標準
實施日期:	1981-5-1
標準狀態:	superseded
被新標準替代:	GB/T 1979-2001 結構鋼低倍組織缺陷評級圖
被替代日期:	2002-5-1
作廢日期:	2002-05-01
翻譯語言:	英文
文件格式:	PDF
中文字符數:	4000 字
翻譯價格(元):	280.0
交付時間:	付款后 1 個工作日

1. The grading diagrams are divided into Diagram I, Diagram II and Diagram III (see pages 5~42) according to the dimensions and defect properties of steels (billets); the application scopes of such diagrams are as follows: Diagram I: used to assess the defects of round and square steel macrostructures with diameter or side length of 40~150mm. Diagram II: used to assess the defects of round and square steel macrostructures with diameter or side length greater than 150~250mm. Diagram III: used to assess the defects of round and square steel macrostructures with diameter or side length of 40~250mm. Note: for the defect assessment for round, square and flat steel macrostructures with diameter or side length less than 40mm or greater than 250mm, corresponding grading diagram shall be referred according to mutual agreement. 2. The allowableness and acceptance grade of various defects in this standard shall be specified in corresponding technical specifications.