1Ts · 2Ts · Ø0.5–6.0 · GOST 3282 · ASTM A641
Galvanized wire
Low-carbon wire 0.5–6 mm with zinc coating for outdoor work and fencing
O · Ø0.8–4.0 · St1kp–St3 · GOST 3282
Annealed tying wire
Soft heat-treated wire 0.8–4 mm for tying reinforcement cages and mesh
GOST 3282-74GB/T 343-2012ASTM A853St1kpSt2kpSt3psQ195Q235SAE 1006SAE 1008
Parameters
| Parameters | |
|---|---|
| Diameter | 0.8–4.0 mm |
| Condition | O — heat-treated (annealed) |
| Surface | Ch — black, S — bright |
| Steel grade | St1kp, St2kp, St3ps / Q195, Q235 |
| Accuracy | normal, increased (P) per GOST 3282 |
| Delivery form | coils, bundles, spools for rebar tying tools |
Sizes and weight
| Ø, mm | Weight, kg/m | Metres per tonne |
|---|---|---|
| 0.8 | 0.004 | 253 431 |
| 1 | 0.006 | 162 196 |
| 1.2 | 0.009 | 112 636 |
| 1.4 | 0.012 | 82 753 |
| 1.6 | 0.016 | 63 358 |
| 2 | 0.025 | 40 549 |
| 2.5 | 0.039 | 25 951 |
| 3 | 0.055 | 18 022 |
| 4 | 0.099 | 10 137 |
Theoretical weight at steel density 7.85 g/cm³. Actual batch weight is by scale and mill certificate.
Description
Tying wire is general-purpose low-carbon wire to GOST 3282-74 in the heat-treated condition (O). It is drawn from 5.5–6.5 mm wire rod of grades St1kp, St2kp, St3 to GOST 380 or Q195, Q235 to GB/T 700, then annealed in bell furnaces without access of air: work hardening is removed, the wire becomes soft and bends without springing back. By surface it is either black (Ch), with annealing scale, or bright (S), annealed in a protective atmosphere.
The difference between grades comes down to carbon content: St1kp and Q195 give soft wire with lower tensile strength, St3 and Q235 are stiffer. For annealed wire GOST 3282 specifies tensile strength and elongation; for non-heat-treated wire, tensile strength only. For tying cages by hand and with a hook, 1.2–1.6 mm is used; for tying tools, 0.8–1.0 mm spools; for strapping bundles and formwork, 2.0–4.0 mm.
During inspection at the mill the bureau measures the diameter with a micrometer in two perpendicular directions on coils from different parts of the batch and checks ovality within the GOST 3282 tolerance, bends samples through reverse bends and checks for cracks, laps and loose scale. The mill test certificate (MTC) is checked against the wire rod heat number, chemical composition and test results; each coil is checked for a tag with diameter, grade and heat, and the packaging for protection from moisture in transit.
Applications
- tying reinforcement cages and mesh on site and at precast concrete plants
- spools for tying tools, 0.8–1.0 mm
- strapping bundles of rolled steel and formwork, fixing insulation and guy wires
- stock for nails, staples and fastener products
- weaving mesh and making hooks, eyes and hangers
Packing and shipment
Coils tied with wire in three places, covered with film or paper and stacked on pallets; coil and spool weight is agreed in the specification. Each coil carries a mill tag with diameter, steel grade and heat.
Grade equivalents
| GOST | GB (China) | ASTM | EN | Note |
|---|---|---|---|---|
| St1kp (GOST 380) | Q195 | AISI 1006 | C4D (EN 10016-2) | Nearest equivalent by carbon content; wire rod steel for soft tying wire |
| St2kp, St3kp (GOST 380) | Q215, Q235 | AISI 1008 | C7D (EN 10016-2) | Nearest 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) | 退火钢丝 (GB/T 343) | ASTM A853 annealed | EN 10218-2 | Equivalence by delivery condition, not by steel grade: EN 10218-2 sets only diameter tolerances |
| 1Ts, 2Ts (GOST 3282) | 热镀锌 / 电镀锌 (GB/T 343) | ASTM A641 Class 1, Class 3 | EN 10244-2 class A–D | Classes 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) | CRB550 (GB/T 13788) | ASTM A1064 D-wire | B500A (EN 10080) | Nearest equivalent: VR-1 is cold-drawn with indentations, CRB550 is cold-rolled ribbed; strength is close, the profile differs |
| A500C (GOST 34028) | HRB400E, HRB500E | Grade 60 (ASTM A615) | B500B (EN 10080) | Nearest 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.
Related items
VR-1 · Ø3–6 · 50×50–200×200 · GOST 8478 · GOST 23279
Welded masonry and road mesh
Mesh of 3–6 mm cold-drawn wire with 50–200 mm openings in sheets and rolls
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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Steel pricing depends on grade, size, tonnage and delivery terms on the day of contract. A number on the page would be wrong by the time you read it.
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