ISO 11124-6:2025

Preparation of steel substrates before application of paints and related products — Specifications for metallic blast-cleaning abrasives — Part 6: Stainless steel (shot and irregulars)

This document specifies requirements for stainless steel (shot and irregulars), as supplied for blast-cleaning processes. It specifies ranges of particle sizes, together with corresponding grade designations. Values are specified for hardness, density, defect/structural requirements, metallographic structure and chemical composition. The requirements specified in this document apply to abrasives supplied in the new condition only. Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125. Stainless steel shot and irregulars are used in both static and site blasting equipment. They are most often selected where there is a possibility for the recovery and re-use of the abrasive. NOTE 1 Although this document has been developed for preparation of steelwork, these materials are predominantly used for non-ferrous substrates. The properties specified will generally be appropriate for use when preparing other material surfaces, or components, using blast-cleaning techniques, and can be used for applications where no subsequent coating is applied. NOTE 2 Whenever dissimilar metals are used together, galvanic corrosion can occur.

Préparation de subjectiles d'acier avant application de peintures et de produits assimilés — Spécifications pour abrasifs métalliques destinés à la préparation par projection — Partie 6: Acier inoxydable (grenaille et irréguliers)

General Information

• Status: Published
• Publication Date: 24-Jul-2025
• ICS: 25.220.10 - Surface preparation
• Technical Committee: ISO/TC 35/SC 12 - Preparation of steel substrates before application of paints and related products
• Drafting Committee: ISO/TC 35/SC 12 - Preparation of steel substrates before application of paints and related products
• Current Stage: 6060 - International Standard published
• Start Date: 25-Jul-2025
• Due Date: 22-May-2026
• Completion Date: 25-Jul-2025

Standards Content (Sample)

International
Standard
ISO 11124-6
First edition
Preparation of steel substrates
2025-07
before application of paints and
related products — Specifications
for metallic blast-cleaning
abrasives —
Part 6:
Stainless steel (shot and irregulars)
Préparation de subjectiles d'acier avant application de
peintures et de produits assimilés — Spécifications pour abrasifs
métalliques destinés à la préparation par projection —
Partie 6: Acier inoxydable (grenaille et irréguliers)
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation of abrasives . 3
5 Sampling . 4
6 Requirements for stainless steel (shot and irregulars) . 5
7 Package identification and lot traceability . 5
8 Information to be provided by the manufacturer or supplier . 6

iii
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 document 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 35 Paints and varnishes, Subcommittee SC 12,
Preparation of steel substrates before application of paints and related products.
A list of all parts in the ISO 11124 series can be found on the ISO website.
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.

iv
International Standard ISO 11124-6:2025(en)
Preparation of steel substrates before application of paints
and related products — Specifications for metallic blast-
cleaning abrasives —
Part 6:
Stainless steel (shot and irregulars)
1 Scope
This document specifies requirements for stainless steel (shot and irregulars), as supplied for blast-cleaning
processes. It specifies ranges of particle sizes, together with corresponding grade designations. Values are
specified for hardness, density, defect/structural requirements, metallographic structure and chemical
composition.
The requirements specified in this document apply to abrasives supplied in the new condition only.
Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125.
Stainless steel shot and irregulars are used in both static and site blasting equipment. They are most often
selected where there is a possibility for the recovery and re-use of the abrasive.
NOTE 1 Although this document has been developed for preparation of steelwork, these materials are
predominantly used for non-ferrous substrates. The properties specified will generally be appropriate for use when
preparing other material surfaces, or components, using blast-cleaning techniques, and can be used for applications
where no subsequent coating is applied.
NOTE 2 Whenever dissimilar metals are used together, galvanic corrosion can occur.
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.
ISO 439, Steel and cast iron — Determination of silicon content — Gravimetric method
ISO 629, Steel and cast iron — Determination of manganese content — Spectrophotometric method
ISO 9556, Steel and iron — Determination of total carbon content — Infrared absorption method after
combustion in an induction furnace
ISO 10138, Steel and iron — Determination of chromium content — Flame atomic absorption spectrometric method
ISO 4940, Steel and cast iron — Determination of nickel content — Flame atomic absorption spectrometric method
ISO 11125-1, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 1: Sampling
ISO 11125-2, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 2: Determination of particle size distribution
ISO 11125-3, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 3: Determination of hardness

ISO 11125-4, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 4: Determination of apparent density
ISO 11125-5, Preparation of steel substrates before application of paints and related products — Test
methods for metallic blast-cleaning abrasives — Part 5: Determination of percentage defective particles and of
microstructure
ISO 11125-6, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 6: Determination of foreign matter
ISO 11125-7, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 7: Determination of moisture
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for us
...

FINAL DRAFT
International
Standard
ISO/FDIS 11124-6
ISO/TC 35/SC 12
Preparation of steel substrates
Secretariat: BSI
before application of paints and
Voting begins on:
related products — Specifications
2025-04-23
for metallic blast-cleaning
Voting terminates on:
abrasives —
2025-06-18
Part 6:
Stainless steel (shot and irregulars)
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 11124-6:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 11124-6:2025(en)
International
Standard
ISO/FDIS 11124-6
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 6:
Stainless steel (shot and irregulars)
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 SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 11124-6:2025(en) © ISO 2025

ii
ISO/FDIS 11124-6:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation of abrasives . 3
5 Sampling . 4
6 Requirements for stainless steel (shot and irregulars) . 5
7 Package identification and lot traceability . 6
8 Information to be provided by the manufacturer or supplier . 6

iii
ISO/FDIS 11124-6:2025(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 document 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 35 Paints and varnishes, Subcommittee SC 12,
Preparation of steel substrates before application of paints and related products.
A list of all parts in the ISO 11124 series can be found on the ISO website.
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.

iv
FINAL DRAFT International Standard ISO/FDIS 11124-6:2025(en)
Preparation of steel substrates before application of paints
and related products — Specifications for metallic blast-
cleaning abrasives —
Part 6:
Stainless steel (shot and irregulars)
1 Scope
This document specifies requirements for stainless steel (shot and irregulars), as supplied for blast-cleaning
processes. It specifies ranges of particle sizes, together with corresponding grade designations. Values are
specified for hardness, density, defect/structural requirements, metallographic structure and chemical
composition.
The requirements specified in this document apply to abrasives supplied in the new condition only.
Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125.
Stainless steel shot and irregulars are used in both static and site blasting equipment. They are most often
selected where there is a possibility for the recovery and re-use of the abrasive.
NOTE 1 Although this document has been developed for preparation of steelwork, these materials are
predominantly used for non-ferrous substrates. The properties specified will generally be appropriate for use when
preparing other material surfaces, or components, using blast-cleaning techniques, and can be used for applications
where no subsequent coating is applied.
NOTE 2 Whenever dissimilar metals are used together, galvanic corrosion can occur.
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.
ISO 439, Steel and cast iron — Determination of silicon content — Gravimetric method
ISO 629, Steel and cast iron — Determination of manganese content — Spectrophotometric method
ISO 9556, Steel and iron — Determination of total carbon content — Infrared absorption method after
combustion in an induction furnace
ISO 10138, Steel and iron — Determination of chromium content — Flame atomic absorption spectrometric method
ISO 4940, Steel and cast iron — Determination of nickel content — Flame atomic absorption spectrometric method
ISO 11125-1, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 1: Sampling
ISO 11125-2, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 2: Determination of particle size distribution
ISO 11125-3, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 3: Determination of hardness

ISO/FDIS 11124-6:2025(en)
ISO 11125-4, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 4: Determination of apparent density
ISO 11125-5, Preparation of steel substrates before application of paints and related products — Test
methods for metallic blast-cleaning abrasives — Par
...

ISO/FDIS 11124-6:2025(en)
ISO/TC 35/SC 12/WG 4
Date: 2025-02-17
Secretariat: BSI
Date: 2025-04-08
Preparation of steel substrates before application of paints and
related products — Specifications for metallic blast-cleaning
abrasives — —
Part 6:
Stainless steel (shot and irregulars)
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés—
Spécifications pour abrasifs métalliques destinés à la préparation par projection— Partie 6: Acier
inoxydable (grenailles ronde et irrégulière)

FDIS stage
ISO/FDIS 11124-6:2025(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
iii
ISO #####-#:####(X/FDIS 11124-6:2025(en)
Contents
Foreword . Error! Bookmark not defined.
1 Scope . Error! Bookmark not defined.
2 Normative references . Error! Bookmark not defined.
3 Terms and definitions . Error! Bookmark not defined.
4 Designation of abrasives . Error! Bookmark not defined.
5 Sampling . Error! Bookmark not defined.
6 Requirements for stainless steel (shot and irregulars) . Error! Bookmark not defined.
7 Package identification and lot traceability . Error! Bookmark not defined.
8 Information to be provided by the manufacturer or supplier . Error! Bookmark not defined.

© ISO #### 2025 – All rights reserved
iv
ISO/FDIS 11124-6:2025(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 document 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 35 Paints and varnishes, Subcommittee SC 12,
Preparation of steel substrates before application of paints and related products.
A list of all parts in the ISO 11124 series can be found on the ISO website.
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
DRAFT International Standard ISO/FDIS 11124-6:2025(en)

Preparation of steel substrates before application of paints and
related products — Specifications for metallic blast-cleaning
abrasives —
Part 6:
Stainless steel (shot and irregulars)
1 Scope
This document specifies requirements for stainless steel (shot and irregulars), as supplied for blast-cleaning
processes. It specifies ranges of particle sizes, together with corresponding grade designations. Values are
specified for hardness, density, defect/structural requirements, metallographic structure and chemical
composition.
The requirements specified in this document apply to abrasives supplied in the new condition only.
Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125.
Stainless steel shot and irregulars are used in both static and site blasting equipment. They are most often
selected where there is a possibility for the recovery and re-use of the abrasive.
NOTE 1 Although this document has been developed for preparation of steelwork, these materials are predominantly
used for non-ferrous substrates. The properties specified will generally be appropriate for use when preparing other
material surfaces, or components, using blast-cleaning techniques, and can be used for applications where no subsequent
coating is applied.
NOTE 2 Whenever dissimilar metals are used together, galvanic corrosion can occur.
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.
ISO 439, Steel and cast iron — Determination of silicon content — Gravimetric method
ISO 629, Steel and cast iron — Determination of manganese content — Spectrophotometric method
ISO 9556, Steel and iron — Determination of total carbon content — Infrared absorption method after
combustion in an induction furnace
ISO 10138, Steel and iron — Determination of chromium content — Flame atomic absorption spectrometric
method
ISO 4940, Steel and cast iron — Determination of nickel content — Flame atomic absorption spectrometric
method
ISO #####-#:####(X/FDIS 11124-6:2025(en)
ISO 11125--1, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 1: Sampling
ISO 11125--2, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 2: Determination of particle size distribution
ISO 11125--3, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 3: Determination of hardness
ISO 11125--4, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 4: Determination of apparent density
ISO 11125--5, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 5: Determination of percentage defective particles and of
microstructure
ISO 11125--6, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 6: Determination of foreign matter
ISO 11125--7, Preparation of steel substrates before application of paints and related products — Test methods
for metallic blast-cleaning abrasives — Part 7: Determination of moisture
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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 3.1
stainless steel shot and irregularsirregular
metallic blast-cleaning abrasive produced by a casting process in which molten stainless steel (3.2(3.2)) is
atomised to form shot (3.3(3.3)) or irregular (3.4(3.4)) shapes
Note 1 to entry: Particles obtained by atomisation processes can be submitted to a mechanical post treatment such as
conditioning (3.5(3.5).).
3.2 3.2
stainless steel
steel containing 10,5 % mass fraction or more chromium, less than or equal to 1,2 % of carbon, and possibly
with other elements added to secure special properties
3.2.1 3.2.1
austenitic
type of stainless steel (3.2(3.2)) whose microstructure, at room temperature, consists predominantly of
austenite
Note 1 to entry: This microstructure is achieved by alloying steel
...