China Steel Pipe Group offers a wide array of prestressing strands (PC Strand), twisted steel cable composed of high strength steel wires, available in both bonded and unbonded types, designed to significantly enhance the reinforcement of prestressed concrete structures. PC strands are essential in fortifying large-span railway and highway bridges, major bridges, silos, buildings, dams, floor slabs, foundations, large concrete vessels, crane beams, anchorages, multi-storied industrial buildings, and more. They are also employed in the construction of roads, utility poles, water towers, and other civil structures, boosting their tensile strength remarkably.
Manufactured from high-carbon steel, our PC strands exhibit low relaxation and stable elastic modulus properties, ensuring a lasting bond with concrete. Its use across diverse projects underlines its importance in modern construction and engineering fields.
Our PC strands are fully tested and compliant with international standards, ready to support your most ambitious architectural and infrastructural projects.
Unbonded prestressed concrete steel strand is engineered with a coating of anti-corrosion grease and encased in a high-density polyethylene (HDPE) sheath. This specialized construction not only guards against environmental damage but also ensures the strand's freedom to move within the sheath, which is crucial for accommodating tension and compression forces in prestressed concrete applications. The default sheathing color is black, providing a standard, neutral option suitable for various construction aesthetics. However, we understand that specific projects may require different visual integrations. Therefore, we offer customization in the sheathing's color upon request. It is important to note that any added colorants are carefully selected to ensure they do not compromise the sheath's performance, maintaining its protective qualities and structural integrity.
| Data Sheet of 7-Wire Prestressed Concrete Steel Strand | |||||
| Construction | Nominal Diameter DN (mm) | Diameter Tolerance (mm) | Nominal Cross-Sectional Area mm² | Theoretical Weight per Meter (g/m) | Center Wire Diameter Elongation (%) |
| 1×7 | 9.50 (9.53) | +0.30 -0.15 |
54.8 | 430 | ≥2.5 |
| 11.10 (11.11) | 74.2 | 582 | |||
| 12.70 | +0.40 -0.15 |
98.7 | 775 | ||
| 15.20 (15.24) |
140 | 1101 | |||
| 15.70 | 150 | 1178 | |||
| 17.80 (17.78) |
191 (189.7) |
1500 | |||
| 18.90 | 220 | 1727 | |||
| 21.60 | 285 | 2237 | |||
| (1×7)I | 12.70 | +0.40 -0.15 |
98.7 | 775 | |
| 15.20 (15.24) |
140 | 1101 | |||
| (1×7)C | 12.70 | +0.40 -0.15 |
112 | 890 | |
| 15.20 (15.24) |
165 | 1295 | |||
| 18.00 | 223 | 1750 | |||
| USA Material and Testing Standard ASTM A 416 | ||||||||
| Construction | Grade | Nominal Diameter (mm) | Nominal Cross-Sectional Area (mm²) | PC Strand Weight (kg/1000m) | Minimum Breaking Force (kN) | Elongation (%) | 1000Hrs Relaxation Rate | |
| Initial Load at 70% of Nominal Max. Load | Initial Load at 80% of Nominal Max. Load | |||||||
| 1×7 | 250 | 6.4 | 23.2 | 182 | 40.0 | ≤3.5 | ≤2.5 | ≤3.5 |
| 7.9 | 37.4 | 294 | 64.5 | |||||
| 9.5 | 51.6 | 405 | 89.0 | |||||
| 11.1 | 69.7 | 548 | 120.1 | |||||
| 12.7 | 92.9 | 730 | 160.1 | |||||
| 15.2 | 139.4 | 1094 | 240.1 | |||||
| 270 | 9.53 | 58.4 | 432 | 102.3 | ≤3.5 | ≤2.5 | ≤3.5 | |
| 11.11 | 74.2 | 582 | 137.g | |||||
| 12.70 | 98.7 | 775 | 183.7 | |||||
| 13.20 | 107.7 | 844 | 200.2 | |||||
| 15.24 | 140.0 | 1102 | 260.7 | |||||
| Mechanical Property of 7-Wire Prestressed Concrete Steel Strand | ||||||||
| Construction | Nominal Diameter (mm) | Nominal Tensile Strength (MPa) | Characteristic Value of Max. Force (kN) (≥) | Max. Value of Max. Force (kN) | 0.2% Yield Force (kN) (≥) | Max. Force Elongation Rate (L≥500mm) 4/% | Stress Relaxation Property | |
| Initial Load Equivalent to Actual Max. Force (%) | 1000Hrs Stress Relaxation Rate (%) | |||||||
| 1×7 | 15.20 (15.24) |
1470 | 206 | 234 | 181 | ≥3.5 | 70 80 |
≤2.5 ≤4.5 |
| 1570 | 220 | 248 | 194 | |||||
| 1670 | 234 | 262 | 206 | |||||
| 9.50 (9.53) |
1720 |
94.3 | 105 | 83.0 | ||||
| 11.10 (11.11) |
128 | 142 | 113 | |||||
| 12.70 | 170 | 190 | 150 | |||||
| 15.20 (15.24) |
241 | 269 | 212 | |||||
| 17.80 (17.78) |
327 | 365 | 288 | |||||
| 18,90 | 1820 | 400 | 444 | 352 | ||||
| 15.70 | 1770 | 266 | 296 | 234 | ||||
| 21.60 | 504 | 561 | 444 | |||||
| 9.50 (9.53) |
102 | 113 | 89.8 | |||||
| 11.10 (11.11) |
1860 | 138 | 153 | 121 | ||||
| 12.70 | 184 | 203 | 162 | |||||
| 260 | 288 | 229 | ||||||
| 15.70 | 279 | 309 | 246 | |||||
| 17.80 (17.78) |
355 | 391 | 311 | |||||
| 18.90 | 409 | 453 | 360 | |||||
| 21.60 | 530 | 587 | 466 | |||||
| 9.50 9.53 |
1960 | 107 | 118 | 94.2 | ||||
| 11.10 (11.11) |
145 | 160 | 128 | |||||
| 12.70 | 193 | 213 | 170 | |||||
| 15.20 (15.24) |
274 | 302 | 241 | |||||
| 1×71 | 12.70 | 1860 | 184 | 203 | 162 | |||
| 15.20 (15.24) |
260 | 288 | 229 | |||||
| (1×7)C | 12.70 | 1860 | 208 | 231 | 183 | |||
| 15.20 (15.24) |
1820 | 300 | 333 | 264 | ||||
| 18.00 | 1720 | 384 | 428 | 338 | ||||
| Mechanical Property of 19-Wire Prestressed Concrete Steel Strand | |||||||||
| Construction | Nominal Diameter (mm) | Nominal Tensile Strength (MPa) | Characteristic Value of Max. Force (kN) (≥) | Max. Value of Max. Force (kN) | 0.2% Yield Force (kN) (≥) | Max. Force Elongation Rate (L≥500mm) 4/% | Stress Relaxation Property | ||
| Initial Load Equivalent to Actual Max. Force (%) | 1000Hrs Stress Relaxation Rate (%) | ||||||||
| 1×19S (1+9+9) |
28.6 | 1720 | 915 | 1021 | 805 | ≥3.5 | 70 80 |
≤2.5 ≤4.5 |
|
| 17.8 | 1770 | 368 | 410 | 334 | |||||
| 19.3 | 431 | 481 | 379 | ||||||
| 20.3 | 480 | 534 | 422 | ||||||
| 21.8 | 554 | 617 | 488 | ||||||
| 28.6 | 942 | 1048 | 829 | ||||||
| 20.3 | 1810 | 491 | 545 | 432 | |||||
| 21.8 | 567 | 629 | 499 | ||||||
| 17.8 | 1860 | 387 | 428 | 341 | |||||
| 19.3 | 454 | 503 | 400 | ||||||
| 20.3 | 504 | 558 | 444 | ||||||
| 21.8 | 583 | 645 | 513 | ||||||
| 1×19W (1+6+6/6) |
28.6 | 1720 | 915 | 1021 | 805 | ||||
| 1770 | 942 | 1048 | 829 | ||||||
| 1860 | 990 | 1096 | 854 | ||||||
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Manufactured using sophisticated continuous hot strip mills, hot-rolled steel coils are known for their excellent formability and weldability.
Our ERW round steel pipes are longitudinally welded pipes that are manufactured by forming steel strip into hollow shape, and then welded along the length of the steel pipe.
Spiral welded steel pipes are produced by spirally winding a steel strip at a predetermined angle, forming a tube that is welded along the seam.
Seamless steel pipes are manufactured by thrusting a piercing mandrel through a steel billet to form a hole, then processed by a rolling mill to a specified diameter and wall thickness.
Established in 2003, China Steel Pipe Group Corp.,Ltd . is a manufacturer in the steel pipes and PC strand wire industry. Our primary products include ERW pipes, SSAW pipes, LSAW pipes, high-precision welded pipes, prestressed steel wires, and prestressed steel strands. We also offer extensive processing services such as welding, grooving, threading, painting, and coating to meet your specific requirements. Our steel products are widely used in firefighting, cable management, material transportation, steel structures, railings, piling, construction, and machinery manufacturing.
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