Prestressed concrete
Construction & infrastructure
Wire rod for prestressed concrete has high carbon grades (typically over 0.75% C) that can be alloyed with chromium (up to 0.5 % Cr) and vanadium (up to 0.16% V) and is delivered in diameters up to 16 mm.
Depending on the grades and diameters, tensile strength ranges from 1000 MPa to 1350 MPa.
Special know-how is required for prestressed concrete wire rod production and drawing because of the carbon content, alloying elements and the final mechanical properties required.
Key properties
Tensile strength related to high carbon content and micro alloying
Steel cleanliness
Microstructure homogeneity
Surface quality
| C | Si | Mn | Cr | V | TS* (MPa) | |||
|---|---|---|---|---|---|---|---|---|
| Name | % | % | % | % | % | Ø6.5 | Ø10 | Ø15 |
| C80 | 0.78-0.82 | 0.15-0.25 | 0.60-0.70 | max. 0.10 | max. 0.02 | 1200 | 1150 | 1020 |
| C82+Cr | 0.80-0.84 | 0.15-0.25 | 0.65-0.75 | max. 0.25 | max. 0.02 | 1280 | 1200 | 1150 |
| C82+Cr+V | 0.80-0.84 | 0.15-0.30 | 0.70-0.80 | max. 0.25 | 0.03-0.06 | 1250 | 1200 | 1200 |
* Typical value
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