Overview
ISO 23717:2022 specifies requirements for hose reinforcement wire - high-carbon steel wire, generally brass coated, intended for reinforcing high‑pressure rubber or synthetic hoses. The standard covers composition, manufacturing basis, dimensions, mechanical properties and testing for multiple parallel wires used as braided or spirally wrapped reinforcement in hoses designed to withstand relatively high bursting pressures.
Example designation: Hose wire brass coated ISO 23717‑HT‑0,30.
Key topics and technical requirements
- Material and manufacture
- Wire produced from steel rod per ISO 16120 series; wire is patented or hard‑rolled and cold drawn to achieve required properties.
- Default coating: brass with Cu = (67.5 ± 4) % (other coatings by agreement).
- Tensile strength classes
- Five classes: LT (2 150–2 450 MPa), NT (2 450–2 750 MPa), HT (2 750–3 050 MPa), ST (3 050–3 350 MPa), UT (3 350–3 650 MPa).
- Standard provides tensile strength or breaking‑load ranges, and minimum elongation requirements by nominal diameter.
- Mechanical testing
- Mandatory tests include tensile test (ISO 6892‑1), reverse bend test (ISO 7801) and torsion test (ISO 7800), with minimum cycles specified per diameter/class.
- Tests apply both before and after braiding operations where required.
- Surface and dimensional controls
- Requirements for surface quality, coating mass, diameter tolerances, out‑of‑roundness, and acceptance criteria for cast and tip rise/dead cast.
- Delivery, marking and inspection
- Specification of delivery conditions (packaging, spools), weld limits, inspection documentation (e.g., ISO 10474) and labelling requirements.
- Recent updates (2022 edition)
- Added Annex on packaging, updated classification and Cu content, introduced breaking‑load values and cast/tip‑rise requirements, revised diameter tolerances and tests.
Applications
- Reinforcement wires for high‑pressure hydraulic hoses, industrial hoses and flexible lines where high bursting pressure and fatigue resistance are critical.
- Used in braided or spiral constructions in automotive, mobile hydraulics, oil & gas and industrial hydraulic systems.
Who uses this standard
- Steel wire manufacturers (production and quality control)
- Hose producers and braiders integrating reinforcement wire
- Purchasers and specification writers (to order correctly designated wire)
- Testing laboratories and inspectors performing acceptance tests
- Design and R&D engineers specifying hose reinforcement materials
Related standards
Keywords: ISO 23717:2022, hose reinforcement wire, brass coated wire, high tensile steel wire, high‑pressure hoses, tensile strength classes, wire testing, wire dimensions.