Standard No.:	GB/T 7233-1987
Chinese Name:	铸钢件超声探伤及质量评级标准
English Name:	Methods for ultrasonic testing and for specifying quality levels of steel castings
Professional Classification:	J31 Casting
Professional Classification:	GB National Standard
ICS Classification:	77.040.20 Non-destructive testing of metals
Issued by:
Issued on:	1987-02-04
Implemented on:	1987-10-01
Status:	ABOLISHED
Replace By:	GB/T7233.1-2009 Steel castings—Ultrasonic examination—Part 1:Steel castings for general purposes
Replace By Date:	2010-04-01
Language:	English
File Format:	PDF
Word Count:	5500 words
Price(USD):	165 (USD)
Delivery:	via email in 1-3 business day

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.