SIST EN ISO 11124-7:2026

Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 7: High chromium white cast iron grit (ISO 11124-7:2025)

This document specifies requirements for high chromium white cast iron grit, 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. They do not apply to abrasives either during or after use.
High chromium white cast iron grits 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.

Vorbereitung von Stahluntergründen vor dem Auftragen von Beschichtungsstoffen und verwandten Erzeugnissen - Festlegungen für metallische Strahlmittel - Teil 7: Kantiges Strahlmittel aus Chromhartguss (ISO 11124‑7:2025)

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Spécifications des abrasifs métalliques destinés au décapage par projection - Partie 7: Grenailles angulaires de fonte blanche à haute teneur en chrome (ISO 11124-7:2025)

Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Specifikacije za kovinske granulate za peskanje - 7. del: Belo lito železo z visoko vsebnostjo kroma (ISO 11124-7:2025)

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Feb-2026
• 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: 20-Apr-2026
• Due Date: 25-Jun-2026
• Ref Project: EN ISO 11124-7:2026 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 7: High chromium white cast iron grit (ISO 11124-7:2025)

Overview

SIST EN ISO 11124-7:2026 - Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - Part 7: High chromium white cast iron grit (ISO 11124-7:2025), published by CEN, defines the requirements for high chromium white cast iron grit used as a metallic abrasive in blast-cleaning processes. This standard ensures the quality and suitability of these abrasives for surface preparation by specifying particle size, hardness, density, metallographic structure, chemical composition, and defect limitations. The requirements are applicable to abrasives supplied in new condition, ensuring performance and consistency for industrial users.

Key Topics

• High Chromium White Cast Iron Grit: The standard focuses on metallic abrasives made by crushing high chromium white cast iron shot into angular particles. Characterized by a high chromium content and tailored hardness, these grits provide efficient surface cleaning.
• Particle Size and Grade Designation: SIST EN ISO 11124-7:2026 details a range of particle sizes and associated grading codes, facilitating the selection of the appropriate grit for varied applications and equipment.
• Quality Requirements:
  • Hardness: Defines suitable hardness ranges for uniform abrasiveness.
  • Density: Ensures the abrasives are sufficiently heavy for effective impact and cleaning.
  • Defects: Sets limits on acceptable types and levels of defects such as cracks, foreign matter, and shot particles to guarantee performance consistency.
  • Metallographic Structure and Chemical Composition: Specifies the essential iron, chromium, carbon, and other element content for durability and effectiveness.
• Packaging and Traceability: Outlines requirements for package labeling and batch identification, supporting product traceability and consistent supply chain quality.

Applications

The use of high chromium white cast iron grit in blast-cleaning processes is widespread in industries needing surface preparation for coating or finishing. Key applications include:

• Steelwork Preparation: Ideal for preparing steel substrates before applying paints or protective coatings to enhance adhesion and longevity.
• Non-Ferrous Substrate Cleaning: Despite the standard’s development for steel, the specified properties are suitable for cleaning non-ferrous surfaces such as aluminum and copper.
• Component Surface Treatment: Useful in preparing raw or fabricated components by removing contaminants, rust, scale, or old coatings prior to further processing.
• Recoverable and Reusable Abrasives: High chromium cast iron grit is favored in both static (fixed) and mobile (site) blasting equipment due to its durability and ability to be collected and reused, supporting sustainable and cost-effective blast-cleaning operations.
• Applications without Subsequent Coatings: The grit can be used where clean, textured surfaces are desired even without subsequent painting or protective layers.

Note: Users must consider the potential for galvanic corrosion when using this material with dissimilar metals.

Related Standards

For a comprehensive approach to surface preparation and metallic abrasive selection, the following related standards may be referenced alongside SIST EN ISO 11124-7:2026:

• EN ISO 11124-1 to EN ISO 11124-6: Specifications for other types of metallic blast-cleaning abrasives.
• EN ISO 11125 Series: Covers test methods for metallic blast-cleaning abrasives, including sampling, particle size distribution, hardness, density, defect inspection, determination of foreign matter, and moisture content.
• ISO 8501 / ISO 8502 / ISO 8503 Series: Standards for the visual assessment, cleanliness measurement, and surface profile of prepared steel substrates.
• EN ISO 12944: Guidelines for corrosion protection of steel structures by protective paint systems.

Practical Value

Implementing SIST EN ISO 11124-7:2026 assures consistent, high-quality surface preparation, leading to superior paint and coating adhesion, extended service life of structures and components, and optimized blast-cleaning productivity. The standard supports procurement, quality assurance, and operational efficiency in industries where surface preparation is critical to final product performance.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 11124-7:2026
01-januar-2026
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov -
Specifikacije za kovinske granulate za peskanje - 7. del: Belo lito železo z visoko
vsebnostjo kroma (ISO 11124-7:2025)
Preparation of steel substrates before application of paints and related products -
Specifications for metallic blast-cleaning abrasives - Part 7: High chromium white cast
iron grit (ISO 11124-7:2025)
Vorbereitung von Stahluntergründen vor dem Auftragen von Beschichtungsstoffen und
verwandten Erzeugnissen - Festlegungen für metallische Strahlmittel - Teil 7:
Hochchromhaltiges weißes Gusseisenkorn (ISO 11124-7:2025)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Spécifications des abrasifs métalliques destinés au décapage par projection -
Partie 7: Grenailles angulaires de fonte blanche à haute teneur en chrome (ISO 11124-
7:2025)
Ta slovenski standard je istoveten z: prEN ISO 11124-7
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
oSIST prEN ISO 11124-7:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 11124-7:2026
oSIST prEN ISO 11124-7:2026
International
Standard
ISO 11124-7
First edition
Preparation of steel substrates
2025-06
before application of paints and
related products — Specifications
for metallic blast-cleaning
abrasives —
Part 7:
High chromium white cast iron grit
Reference number
ISO 11124-7:2025(en) © ISO 2025

oSIST prEN ISO 11124-7:2026
ISO 11124-7:2025(en)
© 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
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CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
oSIST prEN ISO 11124-7:2026
ISO 11124-7:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Designation of abrasives . 3
5 Sampling . 3
6 Requirements for high chromium white cast iron grit . 3
7 Package identification and lot traceability . 4
8 Information to be provided by the manufacturer or supplier . 4

iii
oSIST prEN ISO 11124-7:2026
ISO 11124-7:2025(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
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This document was prepared by Technical Committee ISO/TC 35 Paints and varnishes, Subcommittee SC12,
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
oSIST prEN ISO 11124-7:2026
International Standard ISO 11124-7:2025(en)
Preparation of steel substrates before application of paints
and related products — Specifications for metallic blast-
cleaning abrasives —
Part 7:
High chromium white cast iron grit
1 Scope
This document specifies requirements for high chromium white cast iron grit, 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. They do
not apply to abrasives either during or after use.
High chromium white cast iron grits 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 Norm
...