prEN 12680-2

SLOVENSKI STANDARD
01-maj-2024
Livarstvo - Ultrazvočno preskušanje - 2. del: Jekleni ulitki za močno obremenjene
sestavne dele
Founding - Ultrasonic testing - Part 2: Steel castings for highly stressed components
Gießereiwesen - Ultraschallprüfung - Teil 2: Stahlgussstücke für hoch beanspruchte
Bauteile
Fonderie - Contrôle par ultrasons - Partie 2: Pièces moulées en acier pour composants
fortement sollicités
Ta slovenski standard je istoveten z: prEN 12680-2
ICS:
77.040.20 Neporušitveno preskušanje Non-destructive testing of
kovin metals
77.140.80 Železni in jekleni ulitki Iron and steel castings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2024
ICS 77.040.20; 77.140.80 Will supersede EN 12680-2:2003
English Version
Founding - Ultrasonic testing - Part 2: Steel castings for
highly stressed components
Fonderie - Contrôle par ultrasons - Partie 2: Pièces Gießereiwesen - Ultraschallprüfung - Teil 2:
moulées en acier pour composants fortement sollicités Stahlgussstücke für hoch beanspruchte Bauteile
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 190.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12680-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 3
2 Normative references . 3
3 Terms and definitions . 4
4 Requirements . 5
4.1 Order information . 5
4.2 Extent of testing . 5
4.3 Maximum acceptable size of discontinuities . 6
4.3.1 General. 6
4.3.2 Indications without measurable dimensions . 6
4.3.3 Indications with measurable dimensions . 6
4.4 Qualification of personnel . 7
4.5 Wall section zones . 7
4.6 Severity levels . 7
5 Testing . 8
5.1 Principles . 8
5.2 Material . 8
5.3 Equipment and coupling medium . 8
5.3.1 Ultrasonic instrument . 8
5.3.2 Probes . 9
5.3.3 Checking of the ultrasonic test equipment . 9
5.3.4 Coupling medium . 9
5.3.5 Test sensitivity and resolution of detection . 9
5.4 Preparation of casting surfaces for testing. 9
5.5 Test procedure . 10
5.5.1 General. 10
5.5.2 Range setting . 10
5.5.3 Sensitivity setting . 11
5.5.4 Consideration of various types of indications . 11
5.5.5 Recording limits . 12
5.5.6 Evaluation of discontinuities to be recorded . 12
5.5.7 Characterization and sizing of discontinuities . 12
5.6 Test report . 13
Annex A (normative) Resolution of detection of the instrument-probe combination . 20
Annex B (informative) Sound-beam diameters . 21
Annex C (informative) Types of indications generated by typical discontinuities . 23
Bibliography . 34
European foreword
This document (prEN 12680-2:2023) has been prepared by Technical Committee CEN/TC 190
“Foundry technology”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12680-2:2003.
Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 10
“Testing for inner discontinuities” to prepare the following standard:
EN 12680-2, Founding — Ultrasonic testing — Part 2: Steel castings for highly stressed components.
This is one of three European Standards for ultrasonic testing. The other standards are:
EN 12680-1, Founding — Ultrasonic testing — Part 1: Steel castings for general purposes.
EN 12680-3, Founding — Ultrasonic testing — Part 3: Spheroidal graphite cast iron castings.
Annex A is normative. Annex B and Annex C are informative.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
1 Scope
This document specifies the requirements for the ultrasonic testing of steel castings (with ferritic
structure) for highly stressed components and the methods for determining internal discontinuities by
the pulse-echo technique. Purchasers determine if components are highly stressed based on the need
for performance or safety.
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 test procedure and recording
levels.
This document does not apply to austenitic steels and joint welds.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1370, Founding - Examination of surface condition
EN ISO 2400, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 1 (ISO
2400)
EN ISO 7963, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 2 (ISO
7963)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712)
EN ISO 16810, Non-destructive testing - Ultrasonic testing - General principles (ISO 16810)
EN ISO 16811, Non-destructive testing - Ultrasonic testing - Sensitivity and range setting (ISO 16811)
EN ISO 16826 Non-destructive testing - Ultrasonic testing - Examination for discontinuities perpendicular
to the surface (ISO 16826)
EN ISO 16827, Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities
(ISO 16827)
EN ISO 22232-1, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 1: Instruments (ISO 22232-1)
EN ISO 22232-2, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 2: Probes (ISO 22232-2)
EN ISO 22232-3, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 3: Combined equipment (ISO 22232-3)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16811, EN 16827 and
EN ISO 16826 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
equivalent reference discontinuity echo size
indication to be recorded during the assessment phase of an ultrasonic test, usually expressed as an
equivalent diameter of a flat-bottomed hole (FBH)
3.2
point-like discontinuity
discontinuity, the dimensions of which are smaller than or equal to the sound-beam width
Note 1 to entry: Dimensions in this document relate to length, width and/or dimension in through-wall direction.
3.3
extended discontinuity
discontinuity, the dimensions of which are larger than the sound-beam width
Note 1 to entry: Dimensions in this document relate to length, width and/or dimension in through-wall direction.
3.4
planar discontinuity
discontinuity having two measurable dimensions
3.5
volumetric discontinuity
discontinuity having three measurable dimensions
3.6
rim zone
1/3 of the through-wall thickness from the surface with a maximum of 30 mm
3.7
special rim zone
outer rim zone of the test object with special requirements
Note 1 to entry: Examples of special requirements are machined surfaces, higher stresses and sealing surfaces.
3.8
non-measurable dimension
dimension of a discontinuity that is smaller than the beam width, which depends on the probe size and
the frequency used. Current state of the industry is < 3 mm
3.9
production welding
any welding carried out during manufacturing before final delivery to the purchaser
3.9.1
joint welding
production welding used to assemble components together to obtain an integral unit
3.9.2
finishing welding
production welding carried out in order to ensure the agreed quality of the casting
4 Requirements
4.1 Order information
The following information shall be available at the time of enquiry and order (see als
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