SIST EN ISO 11124-1:2026

• Abstract:

  This document describes a classification of metallic blast-cleaning abrasives for the preparation of steel substrates before application of paints and related products.; It specifies the characteristics which are required for the complete designation of such abrasives.; This document applies to abrasives supplied in the "new" or unused condition only. It does not apply to abrasives either during or after use.; NOTE Although this document has been developed specifically to meet requirements for the preparation of steelwork, the properties specified are generally appropriate when preparing other material surfaces, or components, using blast-cleaning techniques. These techniques are described in ISO 8504-2 [7].

• Status: Not Published
• Public Enquiry End Date: 02-Dec-2025
• ICS: 25.220.10 - Surface preparation
• ICS: 87.020 - Paint coating processes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Sep-2026
• Due Date: 14-Nov-2026
• Ref Project: EN ISO 11124-1:2026 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification (ISO 11124-1:2026)

• Replaces: SIST EN ISO 11124-1:2018 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and classification (ISO 11124-1:2018)
• Effective Date: 01-Nov-2026
• Referred By: SIST EN 13507:2018 - Thermal spraying - Pre-treatment of surfaces of metallic parts and components for thermal spraying
• Effective Date: 02-Sep-2026
• Referred By: SIST EN 13507:2010 - Thermal spraying - Pre-treatment of surfaces of metallic parts and components for thermal spraying
• Effective Date: 02-Sep-2026

SIST EN ISO 11124-1:2026 is a CEN standard that classifies metallic blast-cleaning abrasives for preparing steel substrates before application of paints and related products. It specifies the characteristics needed for the complete designation of new, unused abrasives, so suppliers and users can identify the product consistently. The document is aimed at people who specify, order, label, receive, or inspect metallic blast-cleaning abrasives.

What does SIST EN ISO 11124-1:2026 specify?

SIST EN ISO 11124-1:2026 specifies how metallic blast-cleaning abrasives are classified and how they are fully designated. It applies only to abrasives supplied in the new or unused condition, which matters because used abrasives can change shape and performance.

The document is organized into:

• Clause 1 Scope
• Clause 2 Normative references
• Clause 3 Terms and definitions
• Clause 4 Classification, with subclauses for abrasive type, initial particle shape, and particle size range
• Clause 5 Designation of abrasives
• Clause 6 Package identification and lot traceability
• Annex A, an informative list of related ISO standards

Annex	What it covers
Annex A	International Standards for metallic and non-metallic blast-cleaning abrasives

What are the key requirements of SIST EN ISO 11124-1:2026?

SIST EN ISO 11124-1:2026 sets out a simple classification system, then turns that classification into a full product designation. In practice, this is the part buyers, suppliers, and quality staff use to avoid confusion about abrasive type, shape, grade, and hardness.

Classification by abrasive type

Clause 4.1 classifies metallic blast-cleaning abrasives according to material, origin, or manufacture, using the abbreviated codes in Table 1. This matters because the code identifies the abrasive family being specified, such as chilled iron, cast steel, cut steel wire, or stainless steel.

Table 1 also links each abrasive type to the comparator expected when the resulting surface profile is assessed in line with ISO 8503-2. That helps users match the abrasive choice with the way surface profile will later be checked.

Initial particle shape

Clause 4.2 classifies the initial particle shape using the symbols in Table 2: shot, grit, cylindrical, and irregular. The standard notes that shape can change during use, so the classification is based on the condition as supplied. In practice, this tells the user what to expect at delivery and what to order when surface profile or cleaning action depends on shape.

Particle size range

Clause 4.3 uses a 3-digit number for each size range or grade, based on the nominal particle size in millimetres × 100. This is important because particle size strongly affects cleaning speed, surface appearance, and profile form, so the grade must be stated clearly.

Full designation

Clause 5 requires the full product designation to start with “Abrasive ISO 11124”, followed by the type code from Table 1, the particle-shape symbol from Table 2, and the 3-digit grade. If different hardnesses are available, the required Vickers hardness [HV] range is added as well. For users, this means the order description should carry the complete code, not just the trade name.

Marking and traceability

Clause 6 requires the unit of sale to be clearly marked with the full product coding, including hardness range where applicable. Sub-units such as bags are marked with the shape and grade codes. Additional lot or production-period traceability is strongly recommended, which helps receiving inspection and later batch tracing.

Scope limitation

The standard applies to abrasives in new or unused condition only. That matters in practice because the classification is intended for the product as supplied, not after it has been in service.

What terms does SIST EN ISO 11124-1:2026 define?

• Blast-cleaning abrasive - a solid material intended for abrasive blast-cleaning.
• Abrasive blast-cleaning - the impact of a high-kinetic-energy stream of blast-cleaning abrasive onto a prepared surface.
• Shot - predominantly round particles with no edges, broken faces, or other sharp surface defects.
• Grit - predominantly angular particles with fractured faces and sharp edges.
• Cylindrical - sharp-edged particles with a diameter-to-length ratio of 1:1 and faces cut roughly at right angles to the centreline.
• Irregular - predominantly non-uniform particles without edges, broken faces, or other sharp surface defects.

Who uses SIST EN ISO 11124-1:2026?

SIST EN ISO 11124-1:2026 is used by abrasive suppliers, coating contractors, procurement teams, and quality or inspection staff involved in steel surface preparation. It is relevant wherever metallic blast-cleaning abrasives are specified for preparing steel substrates before paints and related products.

In practice, users apply it when:

• selecting the abrasive family and shape
• writing purchase orders and product specifications
• checking package labels on delivery
• managing lot traceability
• comparing abrasive choice with the intended surface profile and cleaning outcome

What changed in SIST EN ISO 11124-1:2026 from the previous edition?

SIST EN ISO 11124-1:2026 replaces the second edition, ISO 11124-1:2018. The stated changes are:

• Definition 3.6 was added.
• Table 1 was technically revised.
• Table 2 was technically revised.
• Annex A was technically revised.

Which standards are used with SIST EN ISO 11124-1:2026?

The document points users to related ISO standards for testing, companion specifications, and surface-preparation methods:

• ISO 11125 - test methods for metallic blast-cleaning abrasives, used to verify properties such as size distribution, hardness, density, defective particles, foreign matter, moisture, and wear performance.
• ISO 11126 - specifications for non-metallic blast-cleaning abrasives, for users who compare metallic and non-metallic abrasive families.
• ISO 11127 - test methods for non-metallic blast-cleaning abrasives, for checking the corresponding non-metallic properties.
• ISO 8504-2 - abrasive blast-cleaning methods, giving the process context for surface preparation.
• ISO 8501-1 - visual assessment of surface cleanliness, including photographic examples mentioned in the introduction.
• ISO 8503-2 - comparator procedure for grading surface profile of abrasive blast-cleaned steel.

What does the SIST EN ISO 11124-1:2026 document contain?

SIST EN ISO 11124-1:2026 contains the classification system for metallic blast-cleaning abrasives, the code structure for product designation, and the rules for package marking. It also includes worked examples showing how a full designation is built from type, shape, grade, and, when needed, hardness.

The document’s tables provide:

• the common metallic abrasive types and their abbreviations
• the symbols for initial particle shape
• the comparator guidance linked to abrasive type

Annex A gathers related ISO standards for metallic and non-metallic abrasives and their test methods, which helps users navigate the broader abrasive preparation series.

SLOVENSKI STANDARD
oSIST prEN ISO 11124-1:2025
01-november-2025
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov -
Specifikacije za kovinske granulate za peskanje - 1. del: Splošni uvod in
razvrstitev (ISO/DIS 11124-1:2025)
Preparation of steel substrates before application of paints and related products -
Specifications for metallic blast-cleaning abrasives - Part 1: General introduction and
classification (ISO/DIS 11124-1:2025)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Anforderungen an metallische Strahlmittel - Teil 1: Allgemeine Einleitung und Einteilung
(ISO/DIS 11124-1:2025)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Spécifications pour abrasifs métalliques destinés à la préparation par
projection - Partie 1: Introduction générale et classification (ISO/DIS 11124-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 11124-1
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
oSIST prEN ISO 11124-1:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 11124-1:2025
oSIST prEN ISO 11124-1:2025
DRAFT
International
Standard
ISO/DIS 11124-1
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints and
Voting begins on:
related products — Specifications
2025-10-07
for metallic blast-cleaning
Voting terminates on:
abrasives —
2025-12-30
Part 1:
General introduction and
classification
Préparation des subjectiles d'acier avant application de
peintures et de produits assimilés — Spécifications pour abrasifs
métalliques destinés à la préparation par projection —
Partie 1: Introduction générale et classification
ICS: 25.220.10
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,
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 11124-1:2025(en)
oSIST prEN ISO 11124-1:2025
DRAFT
ISO/DIS 11124-1:2025(en)
International
Standard
ISO/DIS 11124-1
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints and
Voting begins on:
related products — Specifications
for metallic blast-cleaning
Voting terminates on:
abrasives —
Part 1:
General introduction and
classification
Préparation des subjectiles d'acier avant application de
peintures et de produits assimilés — Spécifications pour abrasifs
métalliques destinés à la préparation par projection —
Partie 1: Introduction générale et classification
ICS: 25.220.10
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 2025
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 11124-1:2025(en)
ii
oSIST prEN ISO 11124-1:2025
ISO/DIS 11124-1:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
4.1 Abrasive type .2
4.2 Initial particle shape .2
4.3 Particle size range .3
5 Designation of abrasives . 3
6 Package identification and lot traceability . 3
Annex A (informative) International Standards for metallic and non-metallic blast-cleaning
abrasives . 4
Bibliography . 6

iii
oSIST prEN ISO 11124-1:2025
ISO/DIS 11124-1:2025(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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 12,
Preparation of steel substrates before application of paints and related products.
This third edition cancels and replaces the second edition (ISO 11124-1:2018), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Definition (3.6) added.
— Table 1, Table 2 and Annex A have been technically revised.
A list of all parts in the ISO 11124 series can be found on the ISO website.

iv
oSIST prEN ISO 11124-1:2025
ISO/DIS 11124-1:2025(en)
Introduction
This document is one of a number of parts of ISO 11124 specifying requirements for metallic abrasives for
blast-cleaning.
Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125 (see Annex A).
The requirements for non-metallic abrasives commonly used for blast-cleaning are specified in the various
parts of ISO 11126. Test methods to be used to define these requirements are contained in the various parts
of ISO 11127 (see Annex A).
Abrasive blast-cleaning techniques are widely used to clean and prepare surfaces. During work on
development of a series of International Standards dealing with the preparati
...