标准编号:	GB/T 7233-1987
中文名称:	铸钢件超声探伤及质量评级标准
英文名称:	Methods for ultrasonic testing and for specifying quality levels of steel castings
行业分类:	GB    国家标准
发布机构:	国家标准局
发布日期:	1987-02-04
实施日期:	1987-10-1
标准状态:	superseded
被新标准替代:	GB/T 7233.1-2009 铸钢件 超声检测 第1部分：一般用途铸钢件
被替代日期:	2010-4-1
翻译语言:	英文
文件格式:	PDF

The national standard is the general standard of ultrasonic testing for steel castings. The national standard prescribes the ultrasonic testing method for carbon steel and low alloy steel castings with thickness equal to or more than 30mm and it also prescribed the method for specifying quality levels of steel castings according to ultrasonic testing result. The used ultrasonic testing method is only limited to A-scope pulse-echo method. In the order, the supply and demand consulted the following requirements for steel castings ultrasonic testing. a. The tested region and used probe b. longitudinal wave straight beam probe flaw detection sensitivity c. The steel castings quality level. Different quality level requirements are allowed to put forward for planar discontinuity non-planar discontinuity. The national standard is not applicable to the detection of austenitic stainless steel castings.