Steel for the reinforcement and prestressing of concrete - Test methods - Part 3: Prestressing steel (ISO 15630-3:2025)

This document establishes the standardized procedures for evaluating high-strength steel strands specifically designed for pre-tensioning applications in concrete structures. The scope focuses on defining the technical requirements and test methodologies necessary to verify the mechanical properties, such as tensile strength, yield strength, and elongation, of prestressing tendons. By adhering to these guidelines, manufacturers and testing laboratories can ensure consistency in quality assessment across different production batches. The text outlines the specific conditions for sample preparation, the calibration of testing equipment, and the detailed steps for conducting tensile tests. It addresses the unique characteristics of prestressing steel, distinguishing these methods from those used for general reinforcement bars. The guidelines aim to facilitate international trade and technical cooperation by aligning national practices with established international technical specifications. Compliance with these provisions ensures that materials used in critical infrastructure projects meet rigorous safety and performance standards before being incorporated into construction works.