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What is PC Wire?

Aug. 18, 2021
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What is PC Wire?

                              PC Wire

 

Definition

PC Wire (also referred to as Prestressed Concrete Steel Wire) is high tensile, low relaxation steel wire made from high-carbon steel and widely used for prestressed and post-tensioning technology in various shapes of PC structures.

Prestressed Concrete Steel Wire Features:

PC Wire (also referred to as Prestressed Concrete Steel Wire) is high tensile, low relaxation steel wire made from high-carbon steel and widely used for prestressed and post-tensioning technology in various shapes of PC structures. It has the following characteristics and advantages:

● High tensile strength and low relaxation

● More bonding stress between wire and concrete

● Stable modulus of elasticity

Types

Prestressed steel wire can be classified according to diameter, strength level, surface coating or cross-sectional shape:

1. Classified by surface shape: smooth round prestressed steel wire, spiral ribbed or helix grooved prestressed steel wire (left-handed or right-handed), crimped prestressed steel wire or indented prestressed steel wire ( Two-sided notch, three-sided notch, four-sided notch) etc.

2. Classified by diameter: 4mm, 4.8mm, 5.0mm, 5.1mm, 6.0mm, 6.25mm, 7.0mm, 7.8mm, 8.0mm, 9.0mm, 9.5mm, 10.0mm, 11mm, 12mm, etc.

3. Classified by strength level: medium-strength prestressed steel wire 800~1200MPa; high-strength prestressed steel wire 1470MPa, 1570MPa, 1670MPa, 1770MPa and 1860MPa, etc.

4. Classification by surface coating: uncoated prestressed steel wire, epoxy resin coated prestressed steel wire and galvanized prestressed steel wire.

5. According to the processing technology classification: cold-drawn prestressed steel wire (no relaxation performance requirements) and low relaxation prestressed steel wire.

If the cold drawn prestressed steel wire is stabilized, it becomes a low relaxation prestressed steel wire.

Application

Cold-drawn prestress is generally used for pipelines, especially those made by PCCP process. Low-relaxation pre-stressed steel wire is widely used in railway sleepers and pre-stressed concrete poles, and a small amount is used in building components. Low-relaxation galvanized prestressed steel wire is often used in cable stayed bridges, tie rods of steel tube arch bridges, and prestressed cables used in large-span buildings. Zinc steel wires are generally used for suspension bridges.

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