15.2 mm Low Relaxation Steel Strand
A 15.2 mm diameter prestressing steel strand with low relaxation properties, made from seven high-carbon steel wires, used to induce compressive stress in concrete beams and slabs. Classified under HTS 7312.10.3012 as 'other' stranded wire for prestressing concrete, not electrically insulated, fitting the chapter definition of wire under 16 mm cross-section. Its compact stranding provides exceptional bond with concrete grout.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If diameter exceeds 16 mm
Chapter notes limit 'wire' classification to cross-sections ≤16 mm; larger diameters classify as rope or cable.
If formed into refillable stainless steel keg structures
Special statistical notes define keg components differently, but steel strand for prestressing remains in 7312.
If imported as part of complete prestressed concrete articles
Prestressing wire embedded in finished concrete products falls under other steel articles.
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Import Tips & Compliance
• Specify 'low relaxation' type (relaxation ≤2.5% at 1000 hours) in documentation; ensure strand weighs over 2.5 kg/m to qualify for prestressing specs; check country-of-origin markings as some producers face special tariffs
Related Products under HTS 7312.10.30.12
7-Wire Steel Strand for Concrete Prestressing
This 7-wire steel strand consists of six outer wires helically wound around a central wire, with a total diameter not exceeding 16 mm, specifically engineered for prestressing concrete structures like bridges and buildings. It falls under HTS 7312.10.3012 as stranded wire of iron or steel, not electrically insulated, designed for prestressing concrete, and classified as 'other' within that subheading. The high tensile strength and precise construction ensure it can withstand the forces required to compress concrete.
12.7 mm Parallel Wire Prestressing Strand
Prestressing strand composed of parallel-laid high-strength steel wires, 12.7 mm total diameter, designed for post-tensioning applications in concrete floors and parking structures. It qualifies for HTS 7312.10.3012 as other stranded wire specifically for prestressing concrete, meeting the iron/steel wire criteria with no insulation. The parallel configuration allows for easy installation through ducts in concrete.
9.53 mm Compact Prestressing Steel Cable
Compact 9.53 mm prestressing steel cable of seven twisted wires, optimized for high bond strength in pretensioned concrete railroad ties and piles. Under HTS 7312.10.3012 as other stranded wire for concrete prestressing, with cross-section under 16 mm per chapter notes. Its compact design minimizes void space when grouted.
15.7 mm High Tensile Prestressing Strand
15.7 mm high tensile strength steel strand (1860 grade) for prestressing concrete girders in highway overpasses, formed from seven cold-drawn wires. Fits HTS 7312.10.3012 as other stranded wire for concrete prestressing, not insulated, with wire dimensions under chapter limit. Provides long-term durability under sustained loads.
12.5 mm Unbonded Single Strand for Post-Tensioning
Single 12.5 mm unbonded prestressing strand, greased and sheathed for frictionless movement in post-tensioned concrete slabs, composed of seven steel wires. Classified in HTS 7312.10.3012 as other stranded wire for concrete prestressing since sheathing is not electrical insulation. Allows stressing after concrete cures.