SIST EN ISO 11124-3:2018 PDF

Overview

EN ISO 11124-3:2018 - Preparation of steel substrates before application of paints and related products - Part 3: High-carbon cast-steel shot and grit (ISO 11124-3:2018) specifies quality and supply requirements for metallic blast-cleaning abrasives produced from high‑carbon cast steel. The document defines 14 grades of high‑carbon cast‑steel shot and 11 grades of high‑carbon cast‑steel grit, with mandatory values for hardness, apparent density, defect/structural limits and chemical composition. Requirements apply to abrasives supplied in the new condition only and are intended for use in both static and site blasting equipment, typically where recovery and re‑use systems exist.

Key Topics and Requirements

• Abrasive grades and designation: Grade coding (e.g., M/HCS/S140 or M/HCS/G140/570‑710HV) identifies material type (metallic high‑carbon cast‑steel), shape (S = shot, G = grit) and nominal particle size.
• Material properties specified:
  • Hardness ranges (Vickers values) where alternatives exist
  • Apparent density (bulk density) requirements
  • Chemical composition limits (C, Si, Mn, P, S determined by referenced ISO methods)
  • Defect/structural requirements (voids, shrinkage, cracks, percentage defective particles)
• Sampling and testing: Sampling and test methods are referenced to the ISO 11125 series:
  • ISO 11125‑1 (sampling)
  • ISO 11125‑2 (particle size distribution)
  • ISO 11125‑3 (hardness)
  • ISO 11125‑4 (apparent density)
  • ISO 11125‑5 to ‑7 (defective particles, foreign matter, moisture)
• Traceability and marking: Package identification and lot traceability, plus required supplier information on orders.
• Scope limit: Applies only to abrasives in their new condition - not to material during or after use.

Applications and Users

Practical uses and typical users include:

• Surface preparation / blast cleaning of steelwork prior to painting or coating
• Specifiers and coating engineers selecting an abrasive for a required surface profile and cleaning performance
• Abrasive manufacturers and suppliers ensuring product conformity and correct labelling
• Blasting contractors and asset owners using shot/grit in static or mobile plants with recovery and re‑use systems
• Quality assurance and inspection teams performing acceptance testing and verification

EN ISO 11124-3:2018 helps ensure consistent abrasive performance for achieving targeted surface cleanliness, profile and coating adhesion.

Related Standards

• ISO 11125 series - Test methods for metallic blast‑cleaning abrasives (Parts 1–7)
• ISO 8504‑2 - Surface preparation techniques (blast‑cleaning processes)
• Annex A of EN ISO 11124-3 - guidance on approximate relationships with national standards for metallic abrasives

Keywords: EN ISO 11124-3:2018, high-carbon cast-steel shot, high-carbon cast-steel grit, blast-cleaning abrasives, preparation of steel substrates, ISO 11125, surface preparation, abrasive grades.