When engineers specify cold-drawn steel wire, small differences in grade, diameter tolerance and tensile range decide whether a part forms cleanly or scraps on the line. Getting your cold-drawn steel wire specifications right the first time protects throughput, quality records and delivery dates alike. This guide breaks down the grades, diameters, finishes and mechanical properties that matter most to procurement and quality teams sourcing wire in Europe and North America.
What cold drawing does to the wire
Cold drawing pulls hot-rolled rod through a series of tapered dies at room temperature, reducing the diameter step by step. The process work-hardens the steel, raising tensile strength and yield while tightening the diameter tolerance and improving surface finish. Compared with hot-rolled stock, cold-drawn wire gives you a rounder cross-section, a cleaner surface and more predictable mechanical behavior — exactly what automated forming, heading and welding lines need to run without interruption.
Because the properties are set mechanically rather than by heat treatment alone, the same base grade can be supplied across a wide strength band. That is why a clear specification, not just a grade name, is what actually defines the material you receive.
Steel grades: matching chemistry to the job
Most cold-drawn wire for forming and fastening applications starts from low-carbon steel. The common choices are:
- SAE 1006 — the lowest carbon of the group and the most ductile, ideal for deep bending, mesh and general forming where formability outranks strength.
- SAE 1008 — a balanced, general-purpose grade for fasteners, wireware and light structural parts.
- SAE 1010 — slightly higher carbon for greater strength where the part still needs to cold-form reliably.
Choosing between them is a trade-off between formability and strength. If you are unsure, share the finished-part requirement — bend radius, thread form, weldability — and let the supplier recommend the grade rather than over-specifying.
Diameters, tolerances and finishes
Diameter range and surface finish are where many specifications go vague and cause problems downstream. A complete set of cold-drawn steel wire specifications should state:
- Diameter: from Ø1.00 mm up to Ø14.00 mm, with the tolerance class you need.
- Surface finish: bright, super-bright or black, depending on drawability and whether the wire will be coated, plated or painted later.
- Tensile range: roughly 500 to 1050 N/mm², set by grade and draft.
- Condition: as-drawn or annealed, with cast and helix controlled for straightening and automated feed.
OSSO Wire draws to TS EN 10218 across this range and can also supply annealed wire (Ø1.00–12.00 mm to DIN EN 10016 / TS 2348) when your process needs softer, more ductile material. You can review the full range on the OSSO Wire products page.
Reading cold-drawn steel wire specifications on a data sheet
A trustworthy specification ties four things together: grade, dimensional tolerance, mechanical properties and the standard they are certified against. For cold-drawn steel wire specifications to be auditable, each coil should be heat- and lot-traceable back to its inspection certificate. OSSO Wire issues certificates to EN 10204 3.1, so your incoming-quality team can match every delivery to documented chemistry and mechanical results. Standards references and certificate details are available on the certifications and documents page.
When you compare quotes, make sure every supplier is quoting the same tolerance class and test basis — a lower headline price often hides a wider tolerance or a missing 3.1 certificate.
Sourcing from Türkiye for Europe and the Americas
OSSO Wire is a family-owned Turkish manufacturer with more than four decades of wire-drawing experience, operating a 7,000 m² plant in Manisa with capacity of around 2,500 tonnes per month. That scale is large enough for series supply yet responsive enough for engineered, made-to-spec orders. The company exports to Europe, the Americas, and the Middle East and Africa, with typical lead times of two to four weeks and engineer-to-engineer support — so specifying and buying from those regions stays straightforward.
Frequently asked questions
What is the difference between cold-drawn and annealed wire?
Cold-drawn wire is work-hardened during drawing, giving higher strength and a tighter tolerance. Annealed wire is heat-softened for greater ductility and easier forming. Many buyers specify cold-drawn for strength-critical parts and annealed where deep bending or tight wraps are required.
Which standards apply to cold-drawn steel wire?
OSSO Wire draws cold wire to TS EN 10218 and supplies annealed wire to DIN EN 10016 / TS 2348. Material can be certified to EN 10204 3.1, which most European and North American quality systems accept for incoming inspection.
What diameter and tensile ranges are available?
Cold-drawn wire is available from Ø1.00 to Ø14.00 mm with tensile strength roughly between 500 and 1050 N/mm², in bright, super-bright or black finish. Exact values depend on the grade and the draft applied.
Ready to specify? Request a quote and our team typically responds within one business day, or contact us to discuss grade, tolerance and finish. Every order can ship with EN 10204 3.1 certificates and full heat and lot traceability, so your quality team has the documentation it needs on day one.