Prestressed Concrete Wire (PC wire)
Prestressed Concrete Wire (PC wire) is a high-grade, low-relaxation steel wire that is mainly fabricated from high-carbon steel with high tensile strength and primarily used to check the low-tension qualities found in concrete. PC wire can be drawn to a variety of diameters and manufactured to numerous stress load specifications. When mixed in concrete, it may be uncoated, but for applications that expose it to the elements, it can be galvanized or epoxy-coated, similar to rebar.
Features of PC wire
- 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
- Reducing distortion
- Accelerates the abrasion resistance, water resistance
As per the surface treatment, PC wire can be classified into different types, such as plain PC wire, indented PC wire, and PC wire 3 Ply &7 Ply.
Plain PC wire
Plain PC wire is also known as smooth PC wire indicates the smooth surface treatment of steel wire, without ribs, or indented. It is a traditional form of PC wire which has low relaxation and high tensile strength. Due to its ductility combined with higher strength, it is popular as the suitable steel material used in large-load, long-span PC structures, such as PC Bridge, PC sleeper, PC pipe, and the large-span sloping rope bridge. Besides, without having an explicit yield point, it can cut to the appropriate length as needed. Before its use, PC wire possesses Prestressing force through pre-tensioning or post-tensioning methods. Hence, when combined with concrete, it gains the property to suspend the development of the component crack. Also, steel wire used in prestressed concrete requires no coatings which make it economical.
Indented PC wire
This is a kind of PC Steel Wire which has got an indented surface. Indented PC wire can be found in various shapes like round, ellipse, rhombus, etc. Similarly, it can be classified into two-sides, three-sides, and four-sides. When indented steel wire mixes with concrete it can exert the desired compressive force from the steel wire to the concrete. In other words, it can save steel materials and increases the quality of the concrete structures, thus reduces the cost and helps to deliver better performance.
PC wire 3 Ply & 7 Ply
These are the High Tensile wire and strand with improved proportional limit combined with higher ductility which in the complete sense suited for Prestressed concrete industries. Apart from this, PC wire 3 Ply & 7 Ply are manufactured as per the customer demands which also ease the labour cost. These PC wires are mostly used in railway sleepers.
- 3 x 3 mm PC wire or High Tensile Steel Stranded Wires as per IS 6006-1983 (Un-coated) used in Prestressed Concrete Industry. This is used in large bridges, Flyovers, Ports, and Road Dividers
- 4 mm H.T. Wire (Indented) as per IS 6003-1983 Hard Drawn and Stress Relieved for use in Prestressed Concrete Industry. This is used in the manufacture of Poles & Spun Poles for electrification and telecommunication
- 2.50-5.00 mm as drawn wire as per IS 1785-Part-II of 1983-Plain Hard Drawn Steel Wire for Prestressed Concrete Industry (Stress Relieved)
- Raw Materials are inspected heatwise.
- After annealing the intermediate samples are again tested.
- Finished materials are tested and on approval of our quality team the material is dispatched.
- Breaking Load
- Tensile strength
- Modulus of Elasticity
- Yield Strength
Inbuilt quality checks at all stages of production from steelmaking, rolling, wire drawing. Consistency in properties. Narrow tolerances
|PC Wire||3mm 3ply||Plain PC Wire (for home pipes)|
|IS – 6003||IS – 6006||IS – 1785 (Pt2)|
|BS – 5896||BS-||BS-|
Benefits of PC wire
- Improves the bond strength between Prestressed steel wire and concrete
- Reduces the frictional losses between Pre-stress wire and concrete
- Increases the anchorage efficiency
- Maintains higher effective Pre-stressing force in the structure
- Reduces the number of operations at the customers' end