ISO 4992-1:2020
Steel castings — Ultrasonic testing — Part 1: Steel castings for general purposes
This document specifies the requirements for the ultrasonic testing of steel castings (with ferritic structure) for general purposes, and the methods for determining internal discontinuities by the pulse-echo technique.
This document applies to the ultrasonic testing of steel castings which have usually received a grain-refining heat treatment and which have wall thicknesses up to and including 600 mm. For greater wall thicknesses, special agreements apply with respect to the test procedure and the acceptance levels.
This document does not apply to austenitic steels and to joint welds.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Order information
4.2 Extent of testing
4.3 Maximum acceptable size of discontinuities
4.3.1 General
4.3.2 Acceptance levels for planar discontinuities mainly orientated perpendicular to the surface
4.3.3 Acceptance levels for volumetric discontinuities
4.3.4 Maximum acceptable discontinuities when radiographic testing (RT) of the casting is carried out as a supplement to ultrasonic testing (UT)
4.4 Qualification of personnel
4.5 Wall-section zones
4.6 Classes
5 Testing
5.1 Principles
5.2 Material
5.3 Test equipment and coupling fluid
5.3.1 Ultrasonic instrument
5.3.2 Probes
5.3.3 Checking of the ultrasonic test equipment
5.3.4 Coupling fluid
5.4 Preparation of casting surfaces for testing
5.5 Test procedure
5.5.1 General
5.5.2 Range setting
5.5.3 Sensitivity setting
5.5.4 Consideration of various types of indications
5.5.5 Recording limits
5.5.6 Assessment of discontinuities to be recorded
5.5.7 Characterization and sizing of discontinuities
5.6 Test report
Annex A (informative) Sound-beam diameters
Annex B (informative) Types of indications generated by typical discontinuities
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Order information
4.2 Extent of testing
4.3 Maximum acceptable size of discontinuities
4.3.1 General
4.3.2 Acceptance levels for planar discontinuities mainly orientated perpendicular to the surface
4.3.3 Acceptance levels for volumetric discontinuities
4.3.4 Maximum acceptable discontinuities when radiographic testing (RT) of the casting is carried out as a supplement to ultrasonic testing (UT)
4.4 Qualification of personnel
4.5 Wall-section zones
4.6 Classes
5 Testing
5.1 Principles
5.2 Material
5.3 Test equipment and coupling fluid
5.3.1 Ultrasonic instrument
5.3.2 Probes
5.3.3 Checking of the ultrasonic test equipment
5.3.4 Coupling fluid
5.4 Preparation of casting surfaces for testing
5.5 Test procedure
5.5.1 General
5.5.2 Range setting
5.5.3 Sensitivity setting
5.5.4 Consideration of various types of indications
5.5.5 Recording limits
5.5.6 Assessment of discontinuities to be recorded
5.5.7 Characterization and sizing of discontinuities
5.6 Test report
Annex A (informative) Sound-beam diameters
Annex B (informative) Types of indications generated by typical discontinuities
Bibliography