Prestressed Concrete Strand Description:
Prestressed concrete strand(PC Strand). The products are mainly for the use of prestressed concrete structures reinforced. Such as large-span bridges on railways and highways, overhead crane beams, rock-soil anchoring Projects, multi-story industrial buildings, stadiums, coal mines, etc. Product’s standards: GB/T5224, ASTMA416, BS5896, JISG3536, ISO6934, EN10138 or other special required standards.
1x7 prestressed steel strand, low relaxation pre-stressed steel strand is composed of 7 wires, it has the features of high tensile strength and very low relaxation, which make it could replace traditional deformed steel bar well, and save a lot of steel material. Meanwhile, it makes long-span concrete construction be possible.
High tensile strength, low relaxation, stable modulus of elasticity, stress-relieved, firm connection with concrete, low stress, stable construction, good combination with steel reinforced concrete; saving material, reducing distortion and construction weight, increasing the abrasion resistance, water resistance, stiffness.
Prestressed Concrete Strand Feature:
1. The PC steel strands we provide comply with technical standards such as GB/T 5223, GB/T 5224, ASTM A-416, BS 5896, JIS G3536, or standards mutually agreed upon by the customer and us.
2. PC Strands are also available in various forms for pre-tensioning or post-tensioning applications in plain or galvanized materials ranging from 3 wires, 7 wires, 19 wires and compact constructions.
3. Standard: GB/T5224, ASTMA416, BS5896, JISG3536, ISO6934 & EN10138
Specification of Prestressed Concrete Strand
(ASTM A416)
| Grade | Nominal Dia. (mm) | Tolerance (mm) | Nominal section area （m㎡） | Mass per 1000m (kg/1000m) | Minimum Breaking load | Min Load at 1% Extension (KN) | L0 ≥610mm (%) | The relaxation at 1000 h (Initial load to 70% of nominal max load) (r/%) | |
250 [1725] | 9.5 | ±0.40 | 51.6 | 405 | 89 | 80.1 | 3.5 | 2.5 | 3.5 |
| 11.1 | 69.7 | 548 | 120.1 | 108.1 | |||||
| 12.7 | 92.9 | 730 | 160.1 | 144.1 | |||||
| 15.2 | 139.4 | 1094 | 240.2 | 216.2 | |||||
270 [1860] | 9.53 | +0.65 -0.15 | 54.84 | 432 | 102.3 | 92.1 | |||
| 11.11 | 74.19 | 582 | 137.9 | 124.1 | |||||
| 12.7 | 98.71 | 775 | 193.7 | 165.1 | |||||
| 15.24 | 140 | 1102 | 260.7 | 234.6 | |||||
| Structure | Nominal Dia. (mm) | Tolerance (mm) | Coss section area (Sn/m㎡) | Re. mass per 1000m (kg/1000m) | Fm0.2/KN Tensile strength not less than (MPa) | Fp0.2/KN Yield strength not less than (MPa) | (L0 ≥500mm) Agt Elongation at max load Not less than （%） | Initial load to % of nom inal max than (%) | The relaxation at 1000h (r%) |
| 1X2 | 8 | +0.25 -0.10 | 25.1 | 197 | 1470 1570 1720 1860 1960 | 1320 1410 1550 1670 1760 | 3.5 | 60 70 80 | 1.0 2.5 4.5 |
| 10 | 39.3 | 309 | |||||||
| 12 | 56.5 | 444 | |||||||
| 1x3 | 8.6 | +0.20 -0.10 | 37.3 | 296 | |||||
| 10.8 | 58.9 | 462 | |||||||
| 12.9 | 84.8 | 666 | |||||||
| 1X7 | 9.5 | +0.30 -0.15 | 54.8 | 430 | 1720 1860 1960 | 1550 1670 1760 | |||
| 11.1 | 74.2 | 582 | |||||||
| 12.7 | +0.40 -0.20 | 98.7 | 775 | ||||||
| 15.2 | 140 | 1100 | 1470 1570 1670 1720 1860 1960 | 1320 1410 1500 1550 1670 1760 | |||||
| 15.7 | 150 | 1178 | 1720 1860 | 1550 1670 | |||||
| 17.8 | 191 | 1500 | |||||||
| 21.6 | 285 | 2237 | 1770 | 1590 | |||||
| 1860 | 1670 |
Raw Material
Our raw material is high carbon wire rod SWRH82B and SWRH77B. We mainly purchase the most excellent wire rod from the famous steel group in China.
Production Process
Raw materials (inspection wire) → Surface treatment → First drawing → Steel strand (9 times of drawing) → Stabilization treatment → Anti-rust coiling → Packaging
Inspection:
Both ends of one pc strand coil shall be inspected through stress relaxation test,tension test, hydraulic universal test,
bending test and boroscope test, etc.
PC stands factory
Prestressed Concrete Application:
PC STRAND is mainly used as auxiliary reinforcing strand for concrete structure. eg, long spanned bridges on railway and highway, overhead crane construction, multi-floor industrial building ,etc.
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