ISO 10544:2024

Overview

ISO 10544:2024 specifies technical requirements for cold-reduced steel wire used for the reinforcement of concrete and for manufacture of welded fabric (wire mesh). The second edition updates the 1992 version and covers wire produced from rod by drawing through dies or rollers (coil form straightened products included). Example steel grades given are CRB500 and CRB540H; other grades may be used by agreement. Wires produced from finished products (plates, rails) are outside the scope.

Key Topics

This standard defines measurable and verifiable requirements to ensure consistent bond, strength and conformity:

• Dimensions, masses and tolerances
  • Nominal diameters: 4 mm to 18 mm (recommended diameters listed).
  • Mass/length requirements (e.g., 4 mm ≈ 0.099 kg/m; 8 mm ≈ 0.395 kg/m; 12 mm ≈ 0.888 kg/m; 18 mm ≈ 1.998 kg/m).
• Geometry of bond-enhancing surfaces
  • Ribbed wire: two or more rows of transverse ribs; minimum specific projected rib area (f_r) specified by diameter (e.g., f_r ≥ 0.036 for 4 mm ≤ d < 5 mm up to 0.056 for 10 mm < d ≤ 18 mm).
  • Indented wire: two or more rows of indentations; minimum specific projected indentation area (f_p) values for prestressing wire (e.g., f_p from 0.007 to 0.014 depending on diameter).
• Chemical composition and steel grades
  • Chemical composition limits and grade definitions (CRB500, CRB540H) are provided; product and cast analysis are addressed.
• Mechanical properties and testing
  • Tensile, bend and rebend properties specified; test methods referenced (ISO 6892-1, ISO 15630-1).
  • Details on sampling, test units, conformity evaluation and verification of guaranteed minimum values.
• Designation, marking and traceability
  • Requirements for marking on wire and bundles/coils, plus an informative annex on origin identification.

Applications and Users

ISO 10544:2024 is essential for:

• Steel wire manufacturers and mills producing cold-reduced reinforcement wire
• Welded-fabric (mesh) producers and fabricators
• Structural engineers and specification writers who select reinforcement materials
• Construction contractors, procurement teams, and quality/control laboratories responsible for testing and conformity assessment This standard ensures that wire used in reinforced concrete and welded fabric has reliable bond characteristics, dimensional consistency and verified mechanical performance.

Related Standards

• ISO 404 - Steel and steel products: general delivery requirements
• ISO 6892-1 - Tensile testing at room temperature
• ISO 15630-1 - Test methods for reinforcing bars, rods and wire

For full technical details and official implementation, obtain the complete ISO 10544:2024 from ISO or your national standards body.