prEN ISO 20482

• Abstract:

  ISO 20482:2013 specifies a standard test method for determining the ability of metallic sheets and strips having a thickness from 0,1 mm up to 2 mm and a width of 90 mm or greater to undergo plastic deformation in stretch forming.; For materials that are thicker and when only narrower strips are available, tools of specified dimensions are provided, in which case subscripts are used, as shown in Table 1.

• Status: Not Published
• Publication Date: 13-Mar-2028
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: ECISS/TC 101 - Test methods for steel (other than chemical analysis)
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 20-Aug-2026
• Completion Date: 20-Aug-2026
• Ref Project: oSIST prEN ISO 20482:2026 - Metallic materials - Sheet and strip - Erichsen cupping test (ISO/DIS 20482:2026)

• Revises: EN ISO 20482:2013 - Metallic materials - Sheet and strip - Erichsen cupping test (ISO 20482:2013)
• Effective Date: 17-Jul-2024

Overview

prEN ISO 20482: Metallic materials - Sheet and strip - Erichsen cupping test (ISO/DIS 20482:2026) establishes a standardized test method for assessing the plastic deformability of metallic sheet and strip materials. Developed by CEN and ISO, this standard targets metallic products with a thickness between 0.1 mm and 2 mm and a width of 90 mm or greater. It provides detailed requirements for both standard and specially dimensioned test pieces, making it valuable for quality control and research in sheet metal forming industries.

The Erichsen cupping test is widely used to determine the ability of metal sheets and strips to withstand stretch forming without failure. This test is essential for manufacturers, suppliers, and users of metallic sheet and strip materials who need reliable data on material ductility and forming capabilities.

Key Topics

• Scope of Application: Applies to metallic sheets and strips with thickness from 0.1 mm to 2 mm and width of at least 90 mm. Provisions are also made for thicker and/or narrower strips, thanks to defined tool dimensions and relevant subscripts.
• Test Principle: A spherical punch presses into a clamped test piece until a through crack forms. The depth of the indentation at fracture provides the Erichsen cupping index (IE), a direct measure of material formability.
• Test Equipment: Specifies the dimensions and tolerances for punch, die, blank holder, and the necessary rigidity of equipment. Includes requirements for measuring devices with division as fine as 0.1 mm.
• Preparation of Test Pieces: Details criteria for sample flatness, absence of burrs or distortions, and avoidance of pre-test working that could influence results.
• Test Conditions: Standard test environment is 10°C to 35°C, with controlled conditions at 23±5°C as required.
• Lubrication: Use of graphite grease (with characteristics meeting ISO-L-XCCHB 2 or agreed alternatives) is mandated for accurate results, minimizing friction.
• Reporting: Requires detailed test reports, including reference to ISO 20482, material identification, test conditions, lubricant used, individual and average cupping index values, and the appearance of the test piece after rupture.

Applications

The Erichsen cupping test specified in prEN ISO 20482 plays a crucial role in:

• Quality Control: Ensuring consistent ductility and stretch formability in production lots of automotive, appliance, and construction sheet metals.
• Material Selection: Assisting engineers and designers in comparing and selecting metallic materials for forming operations.
• Process Optimization: Supporting forming process improvements in press shops by providing reliable data for finite element simulations and die design.
• Product Development: Verifying the suitability of new metallic alloys or coatings for deep drawing, stamping, or other sheet forming applications.
• Compliance and Certification: Meeting industry or customer specifications that reference ISO or EN standards for mechanical testing of metals.

Related Standards

Organizations implementing prEN ISO 20482 may also benefit from awareness of these related standards:

• ISO 3290-1: Rolling bearings - Balls - Part 1: Steel balls. Referenced for the use of hardened bearings in place of standard punches.
• ISO 21920-2: Geometrical product specifications (GPS) - Surface texture: Profile - Part 2: Terms, definitions, and surface texture parameters. Used for specifying punch surface finish.
• ISO 6743-9: Lubricants, industrial oils and related products - Classification (for grease).
• Other Mechanical Testing Standards: Such as ISO 6892 (tensile testing) and EN 10139 (cold rolled strip), which may be used in tandem for comprehensive material characterization.

By adhering to the procedures set by prEN ISO 20482, organizations can ensure harmonized and reliable assessment of metallic sheet and strip formability, supporting efficient manufacturing and consistent product quality across global supply chains.

SLOVENSKI STANDARD
01-oktober-2026
Kovinski materiali - Pločevina in trakovi - Preskus globokega vleka po Erichsenu
(ISO/DIS 20482:2026)
Metallic materials - Sheet and strip - Erichsen cupping test (ISO/DIS 20482:2026)
Metallische Werkstoffe - Bleche und Bänder - Tiefungsversuch nach Erichsen (ISO/DIS
20482:2026)
Matériaux métalliques - Tôles et bandes - Essai d'emboutissage Erichsen (ISO/DIS
20482:2026)
Ta slovenski standard je istoveten z: prEN ISO 20482
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 20482
ISO/TC 164/SC 2
Metallic materials — Sheet and strip
Secretariat: JISC
— Erichsen cupping test
Voting begins on:
Matériaux métalliques — Tôles et bandes — Essai
2026-08-21
d'emboutissage Erichsen
Voting terminates on:
ICS: 77.040.10 2026-11-13
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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.
Reference number
ISO/DIS 20482:2026(en)
DRAFT
ISO/DIS 20482:2026(en)
International
Standard
ISO/DIS 20482
ISO/TC 164/SC 2
Metallic materials — Sheet and strip
Secretariat: JISC
— Erichsen cupping test
Voting begins on:
Matériaux métalliques — Tôles et bandes — Essai
d'emboutissage Erichsen
Voting terminates on:
ICS: 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 20482:2026(en)
ii
ISO/DIS 20482:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and designations . 1
5 Principle . 2
6 Testing equipment . 3
7 Test piece . 3
8 Test conditions . 4
9 Procedure . 4
10 Test report . 4
Annex A (informative) Example composition of the graphite grease . 6
Bibliography . 7

iii
ISO/DIS 20482:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals,
Subcommittee SC 2, Ductility testing.
This third edition cancels and replaces the second edition (ISO 20482:2013), which has been technically
revised.
The main changes are as follows:
— the definition on “through crack” in 3.1 has been partially modified;
— the dimension line for “h ” in Figure 1 has been corrected;
— the first sentence in 6.2 has been partially modified and the second sentence has been added in 6.2;
— “shall” in the first sentence of 6.4 has been replaced by “should”;
— ISO 21920-2 has been added as referenced document in 6.4.2;
— ISO 3290-1 has been added as referenced document in 6.9;
— a clarification regarding an example composition of the graphite grease is added in 9.2 and Annex A;
— Additional specifications are given, if a sudden drop in force is used rather than the visual appearance of
the crack in 9.6
— Information are given about the rounding of the h readings and about decimal places regarding product
standards or special agreements.
— “by the parties involved” has been added in e) and f) of 10;
— “(IE, IE , IE , IE , depending on the bore diameter d used for the tests) and each of the individual
40 21 11 2
values before averaging” has been added in f) of 10;
— Annex A has been revised throughout.

iv
ISO/DIS 20482:2026(en)
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
...