ISO 16120-1:2017

Overview

ISO 16120-1:2017 - Non-alloy steel wire rod for conversion to wire - Part 1: General requirements - defines the general technical and delivery requirements for non‑alloy steel wire rod intended for subsequent wire drawing and/or cold rolling. Applicable to a variety of cross‑sections (round, oval, square, rectangular, hexagonal, octagonal, half‑round or others) with generally at least 5 mm nominal dimension and a smooth surface, this third edition (2017) sets the framework for production, inspection and documentation of wire rod used as feedstock for wire manufacture.

Key topics and technical requirements

• Scope and exclusions: Applies to non‑alloy steel wire rod for conversion to wire but excludes specialized products covered by other standards (e.g., rod for heat treatment, free‑cutting steels, cold heading/extrusion, welding electrodes, reinforcement fabric, bearing grades, high‑fatigue spring wire).
• Classification and ordering information: Specifies purchaser-supplied details such as quantity, cross‑section, nominal dimension and tolerance class (see ISO 16124), steel grade or tensile strength, inspection document type, coil dimensions, surface condition and optional requirements (e.g., decarburization class, galvanizing suitability).
• Production and delivery: Addresses production process, delivery condition and method of binding/labeling. References general delivery requirements in ISO 404.
• Inspection and testing: Defines inspection documents, acceptance units, sampling and preparation. Test topics include chemical composition, tensile strength, decarburization, surface discontinuities, non‑metallic inclusions, core segregation, and microstructure. Procedures and retest rules are referenced.
• Surface and internal quality: Adds definitions and assessment methods for core segregation, surface discontinuity, and mechanical damage; includes normative annexes for core segregation and cementite/network and resolvable pearlite assessments.
• Marking and dispute handling: Requirements for product marking and procedures for disputes are included.

Practical applications and users

ISO 16120-1 is intended for:

• Steelmakers and rolling mills producing wire rod for conversion to wire
• Wire manufacturers and cold‑rolling shops who require consistent feedstock quality
• Purchasing/specification engineers preparing orders for wire rod
• Quality, inspection and testing laboratories assessing rod conformity

Use cases:

• Specifying wire rod for general‑purpose wire drawing operations
• Establishing supplier contracts and inspection plans
• Guiding incoming inspection and acceptance testing of wire rod coils

Related standards

• ISO 16120-2, ISO 16120-3, ISO 16120-4 (specific requirements for grade groups)
• ISO 16124 (dimensions and tolerances)
• ISO 404 (general technical delivery requirements)
• ISO 10474 (inspection documents)
• Relevant test standards (ISO 377, ISO 6892-1, ISO 3887, etc.)

Keywords: ISO 16120-1, non-alloy steel wire rod, wire rod standards, wire drawing, cold rolling, inspection requirements, core segregation, surface discontinuity, tensile strength, chemical composition.