If you specify or purchase steel wire for manufacturing, TS EN 10218 is a standard you will meet again and again on datasheets, inspection certificates and purchase orders. It defines how steel wire is dimensioned, toleranced and tested, giving buyers in Europe and North America a common language for what in-spec actually means. This guide explains what the standard covers, how to read it on a mill certificate, and what to verify before you approve a supplier.
What TS EN 10218 covers
It is the Turkish adoption of the European EN 10218 standard for steel wire and wire products. This is a general standard, meaning it governs the fundamentals that apply across many wire types rather than the chemistry of a single grade. It is published in two parts:
- Part 1 – General: test methods, terminology and the technical delivery conditions that frame how wire is produced and accepted.
- Part 2 – Wire dimensions and tolerances: the permitted diameter tolerances, ovality limits and dimensional classes for drawn round wire.
Because it is dimension- and method-focused, the standard is usually cited alongside a material grade (such as SAE 1006, 1008 or 1010) and a mechanical requirement. Together they tell the mill exactly what to draw and how tightly to hold it.
The requirements that matter on a datasheet
For a procurement or quality engineer, a few areas of the standard do most of the work when you compare quotes or inspect an incoming lot:
- Diameter tolerance: the allowable plus/minus band around the nominal diameter, tightened by tolerance class.
- Ovality (roundness): how far the cross-section may depart from a true circle, which matters for feeding, forming and welding.
- Tensile strength range: agreed in N/mm² and controlled by the drawing reduction and any annealing step.
- Surface condition: bright, super-bright or black finishes, free from harmful defects such as scale, seams or slivers.
At OSSO Wire, cold-drawn wire is produced to this standard across Ø1.00–14.00 mm with tensile strengths from roughly 500 to 1050 N/mm², so a single specification can be tuned to the exact hardness and finish your process needs. You can review the full parameters on our steel wire products page.
Why TS EN 10218 matters for buyers in Europe and North America
Specifying to a recognised standard removes ambiguity from cross-border sourcing. When your drawing calls out the standard with a grade and a tensile range, a mill in Türkiye, a converter in Germany and a fastener line in the United States are all working from the same rulebook. That reduces the back-and-forth, protects your line against dimensional surprises and turns incoming inspection into a matter of confirming numbers rather than negotiating expectations.
It also underpins traceability. Wire delivered against the standard can be documented with an EN 10204 3.1 inspection certificate that ties the coil to its heat and lot, its measured dimensions and its mechanical results. For regulated sectors – automotive fasteners, appliances, refrigeration and construction – that paper trail is often as important as the wire itself. You can see the documentation OSSO Wire issues on our certifications and documents page.
How to use the standard when qualifying a supplier
Treat the standard as a working checklist rather than a box to tick. Before you place a first order, confirm the practical details that decide whether the wire runs cleanly on your equipment:
- Ask which tolerance class the mill will hold, not just that it meets the standard.
- State your tensile range and surface finish explicitly, in the units your process uses.
- Request a sample EN 10204 3.1 certificate to see the format and the data it reports.
- Confirm coil weight, packaging and lead time so the delivery fits your handling and scheduling.
A supplier that answers these quickly and in writing is usually one that will be easy to work with once you are in production.
Frequently asked questions
Is TS EN 10218 the same as EN 10218?
Yes, in substance. It is the Turkish Standards Institution adoption of the European EN 10218, so the technical requirements align with the EN version that engineers in Europe already reference. Wire produced to it is therefore directly comparable to EN 10218 material.
Does the standard specify the steel grade?
No. It governs dimensions, tolerances and test methods rather than chemistry, so it is normally paired with a grade such as SAE 1006, 1008 or 1010 and an agreed tensile range. That combination is what fully defines the wire you receive.
Can I get a material certificate with wire made to this standard?
Yes. OSSO Wire supplies cold-drawn wire to this standard with EN 10204 3.1 certificates, giving you heat- and lot-level traceability for incoming inspection and audits.
Talk to OSSO Wire
OSSO Wire is a family-owned Turkish manufacturer with more than four decades of wire-drawing experience, exporting cold-drawn, annealed and cut-to-length wire to Europe, the Americas and beyond. If you are specifying to TS EN 10218, tell us your diameter, grade, tensile range and finish and we will confirm feasibility fast – typically within one business day. Request a quote or contact our team to get EN 10204 3.1-certified wire that matches your drawing.