Wire and mesh
Low-carbon wire to GOST 3282 and mesh made from it and from rebar: tying reinforcement cages, reinforcing masonry and screeds, road bases, fencing.
5
items with size and weight tables
16
standards for rolling and acceptance
Items in this category
Annealed tying and galvanized wire, welded and reinforcing mesh, chain-link fencing
What it is and how it is supplied
The category covers general-purpose wire and products made from it. Wire is produced by drawing 5.5–8 mm wire rod through a series of dies; after drawing it is work-hardened, and for tying wire the mill anneals it in bell furnaces to restore ductility. Galvanized wire is coated by hot-dip or electrolytic zinc plating; the coating class is set by the zinc weight per square metre of surface.
Details
Welded masonry and road mesh is assembled from 3–6 mm cold-drawn wire by resistance spot welding at every intersection. Reinforcing mesh is welded from A500C or B500C bars of 6–12 mm and replaces manual tying on slabs, floors and foundations. Chain-link mesh is woven from 1.4–3 mm wire in spirals without welding and is supplied in rolls.
For Uzbekistan the base standard remains GOST: 3282 for wire, 23279 and 8478 for welded mesh, 5336 for chain-link. Chinese mills work to GB/T 343 and GB/T 1499.3, so the specification fixes both the GOST requirements and the steel grade to GB. The batch is inspected at the mill: wire diameter, mesh opening, zinc weight, weld joint strength, correspondence of the certificate to the heat. Rejected material recorded in an inspection report is replaced; the replacement is supplied by the manufacturing mill under its contract with the bureau.
Grade equivalents
Equivalents are the nearest, not identical: the exact grade and standard are written into the contract.
| GOST | GB (China) | ASTM | EN | Note |
|---|---|---|---|---|
| St1kp (GOST 380) | GB (China)Q195 | ASTMAISI 1006 | ENC4D (EN 10016-2) | NoteNearest equivalent by carbon content; wire rod steel for soft tying wire |
| St2kp, St3kp (GOST 380) | GB (China)Q215, Q235 | ASTMAISI 1008 | ENC7D (EN 10016-2) | NoteNearest equivalent; for galvanized wire and chain-link mesh. Q235 is stiffer than St2kp; the grade is fixed in the specification |
| O wire (annealed, GOST 3282) | GB (China)退火钢丝 (GB/T 343) | ASTMASTM A853 annealed | ENEN 10218-2 | NoteEquivalence by delivery condition, not by steel grade: EN 10218-2 sets only diameter tolerances |
| 1Ts, 2Ts (GOST 3282) | GB (China)热镀锌 / 电镀锌 (GB/T 343) | ASTMASTM A641 Class 1, Class 3 | ENEN 10244-2 class A–D | NoteClasses are defined by zinc weight per m² and do not match directly; the specification states the coating weight in g/m² |
| VR-1 (GOST 6727) | GB (China)CRB550 (GB/T 13788) | ASTMASTM A1064 D-wire | ENB500A (EN 10080) | NoteNearest equivalent: VR-1 is cold-drawn with indentations, CRB550 is cold-rolled ribbed; strength is close, the profile differs |
| A500C (GOST 34028) | GB (China)HRB400E, HRB500E | ASTMGrade 60 (ASTM A615) | ENB500B (EN 10080) | NoteNearest equivalent by yield strength is HRB500E (500 N/mm²); HRB400E is lower (400 N/mm²); for reinforcing mesh the specification states the class to GOST 34028 and the grade to GB/T 1499.2 |
Equivalents are the closest match, not identical: chemistry and tolerances differ between standards. The exact grade and standard are written into the contract.
Buyer questions
How to read a mill test certificate for wire and mesh
The mill test certificate (MTC) states the standard, steel grade, wire rod heat number, chemical composition, diameter, tensile strength, elongation and number of reverse bends; for galvanized wire, the zinc weight per m². The bureau checks the heat number against the tag on the coil or mesh bundle and against the marking on the packaging: a certificate without a matching heat is not accepted.
How tying wire differs from galvanized wire and which to choose
Tying wire is annealed (O), soft, bends by hand and does not spring back; it is used for tying reinforcement cages and stays inside the concrete, where corrosion is not critical. Galvanized wire is usually unannealed, stiffer, with a zinc coating of class 1Ts or 2Ts; it works outdoors: fencing, guy wires, fixing mesh. Galvanized wire is not needed for tying cages, and black wire is not suitable for outdoor use.
How the tonnage of wire and mesh is calculated
Wire is calculated by weight: the weight per linear metre equals 0.006165·d², where d is the diameter in millimetres; the length per coil and per tonne follows from this. Welded mesh is calculated by weight per square metre: twice the number of wires per metre multiplied by the weight per metre of wire, plus the overhangs at the sheet edges. Chain-link mesh is counted in rolls of a given width and length; the roll weight is stated in the mill certificate.
What is checked during inspection at the mill
Wire diameter with a micrometer in two perpendicular directions on several coils of the batch, ovality, absence of scale and cracks; for galvanized wire, zinc weight by the gravimetric method and coating adhesion by wrapping around a mandrel. For welded mesh: wire diameter, mesh opening, sheet dimensions, shear strength of weld joints, number of unwelded joints. The certificate is checked against the heat, along with marking, tag and packaging; an inspection report with photographs is drawn up.
How a batch is formed and whether there is a minimum quantity
The batch is sized to your quantity; send a specification with diameters, mesh openings, sheet or roll dimensions and coating requirements. Wire and mesh of different sizes are combined in one container so that the load is complete; the weight of coil, roll and bundle is agreed with the mill when the order is placed.
Price request
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Price depends on grade, size, tonnage and delivery terms on the day of contract.
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