IS 7666 : 1988 Ultrasonic Examination of Ferritic Castings of Carbon and Low Alloy Steel - Recommended Procedure

1 Scope

1.1 This standard prescribes recommended procedures forultrasonic testing of ferritie castings of carbon and low alloysteel. This standard is not applicable for austenitic steelcastings.

1.2 The metallurgical grain structure has an appreciable effecton ultrasonic transmission and in order to obtain a favourablelgrain structure, the casting shall be subjected to grain refiningheat treatment, such as normalising annealing of hardening andtempering.

1.3 Longitudinal wave probe is recommended for the test. Thisstandard does not preclude the use shear wave (transverse) probe orTR probe where it is specially advantageous but the test proceduresand acceptance standard shall be subjected to agreement between thecontracting parties.

2 References

IS 2417 : 1977Glossary of terms relating to ultrasonic testing

IS 3664 : 1981Acceptance standards for ultrasonic inspection of steelcastings

IS 4904 : 1982Calibration block for evaluation of ultrasonic flawdetection equipment

IS 9565 : 1986 Codeof practice for ultrasonic pulse echo testing bycontact immerswion methods