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Prestressed steel strand is a twisted steel cable consisting of 2, 3, 7 or 19 high-strength steel wires, which has been stress-relieved (stabilized) and is suitable for prestressed concrete and similar purposes.
The main characteristics of prestressed steel strand are high strength and good relaxation performance, and it is relatively straight when unfolded. The common tensile strength grade is 1860 MPa, and there are strength grades such as 1720, 1770, 1960, 2000, 2160, 2230, 2360 MPa. This steel also has a high yield strength.
Cast-drawn steel strands are mainly used in lifting projects, and are also used in projects such as nuclear power.
19-wire large-diameter steel strands are often used for mine support anchor cables.
Unbonded prestressed steel strands are often used in building floors and some geotechnical anchor cables.
Galvanized steel strands are often used in bridge tie rods, cables and external prestressed projects. The use of epoxy-coated steel strands is similar to that of galvanized prestressed steel strands, and is suitable for projects with high durability requirements.
| Structure | Nominal diameter | Tolerance on Diameter | Nominal Area of Section | Weight of strand | Tensile Strength, Rm | Minimum Breaking load,Fm | 0,2% proof force , Fp0.2 | Elongation Lo=500mm, Agt | Curvative of strand | Lay Length | The Relaxation at 1000h (initial load to 70% of nominal max load ) (r/%) Not more than |
| (mm) | (mm) | (mm2) | (kg/1000m) | (N/mm2) | KN | KN | (%) | mm | mm | ||
| 1X7 | 9.5 | +0.30 -0.15 | 54.8 | 430 | 1860 | 102 | 89.8 | 3.5 | Max bow height = 25mm/ 1meter | (12-16)d | 2.5 |
| 9.5 | 54.8 | 430 | 1960 | 107 | 94.2 | ||||||
| 11. 10 | 74.2 | 582 | 1860 | 138 | 121 | ||||||
| 11. 10 | 74.2 | 582 | 1960 | 145 | 128 | ||||||
| 12. 70 | +0.40 -0.15 | 98.7 | 775 | 1860 | 184 | 162 | |||||
| 12. 70 | 98.7 | 775 | 1960 | 193 | 170 | ||||||
| 15.2 | 140 | 1101 | 1860 | 260 | 229 | ||||||
| 15.2 | 140 | 1101 | 1960 | 274 | 241 | ||||||
| 15. 70 | 150 | 1178 | 1860 | 279 | 246 | ||||||
| 17. 80 | 191 | 1500 | 1860 | 355 | 311 |
| Grade | Nominal diameter | Tolerance on Diameter | Nominal Area of Section | Weight of strand | Tensile Strength | Minimum Breaking load | Minimum load at 1% Extension | Elongation Lo=610mm | Lay Length | The Relaxation at 1000h (initial load to 70% of nominal max load ) (r/%) Not more than | |||
| (mm) | (in.) | (mm) | (mm2) | (in.2) | (kg/ 1000m) | (lb/ 1000ft) | (N/mm2) | (KN) | (KN) | (%) | mm | ||
| 270 (1860) | 9.53 | 3/8 | +0.65,-0.15 | 54.8 | 0.085 | 432 | 290 | 1860 | 102.3 | 92.1 | 3.5 | (12-16)d | 2.5 |
| 11.11 | 7/16 | +0.65,-0.15 | 74.2 | 0.115 | 582 | 390 | 1860 | 137.9 | 124.1 | ||||
| 12.7 | 1/2 | +0.65,-0.15 | 98.7 | 0.153 | 775 | 520 | 1860 | 183.7 | 165.3 | ||||
| 15.24 | 3/5 | +0.65,-0.15 | 140 | 0.217 | 1102 | 740 | 1860 | 260.7 | 234.6 | ||||
| 17.78 | 7/10 | +0.65,-0.15 | 189.7 | 0.294 | 1487 | 1000 | 1860 | 353.2 | 318 | ||||
According to the surface morphology, it can be divided into: smooth strand (no coating), notched strand, die-drawn strand (compact), galvanized prestressed strand, epoxy resin coated prestressed strand, etc.
It can also be classified according to diameter, strength level, standard or raw material.
When the strength is particularly high (such as 2300 MPa), alloy elements such as chromium need to be added, and galvanized high-strength products can increase the silicon content.
Some prestressed steel strands made of carbon steel have coating materials on the surface, such as zinc, zinc-aluminum alloy, zinc-aluminum-magnesium alloy, epoxy resin, anti-corrosion grease, polyester and high-density polyethylene sheaths.
Stainless steel can also be used to make prestressed steel strands, using high-strength duplex stainless steel.
steel, galvanized steel, PPGI, PPGL, copper, aluminum. Our team has focused on the steel industry for 15 years. The company has
established long-term close cooperative relations with well-known domestic steel companies. At the same time, the company's annual
spot reserve exceeds 1000,000 tons, so we can guarantee a short delivery time. Baotai Steel provides services for large
enterprises such as domestic government construction projects, Chinese listed companies, and state-owned enterprises. High-quality
products, low prices, and high-quality services are highly praised by customers. Customers from various countries have signed
agency agreements with Baotai Steel and become Baotai Steel's agents. Baotai Steel's service team is online 24 hours a day to
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Q1: What is your MOQ?
A: Usually our MOQ is one container, but it is different for some items, please contact us for details.
Q2:What is your terms of payment?
A:We usually accept T/T in advance, L/C for large sum.If you prefer other payments terms, please discuss.
Q3:What is your delivery time?
A:For products in stock, we can ship it within 7 days after receiving the deposit. For custom order, production time is 15-30 workdays after received the deposit.
Q4:How could you guarantee your products?
A:Mill Test Certification is supplied with shipment, We also accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
Q5: Will all costs be clear?
A:Our quotation is easy to understand and will not incur any additional costs.
