Original
By certification 
PC steel bar is a kind of low carbon alloy steel bar with heat treatment for high strength pre-stressed concrete pile. It is mainly used in producing port concrete pile, high-rise building foundation concrete pile and pier concrete pile, etc.
| Specification (mm） |
Facial shape type |
Cross-sectional size （S/mm2） |
Tensile Strength (MPA） |
Plastic elongation strength (Mpa） |
Relaxation rate （%） |
Percentage elongation at maximum force （%） |
Elogation (MM/M） |
Percentage elongation after fracture （%） |
Surface quaility |
| 7.1 | Spiralgroove | 39.0-41.7 | ≥1420 | ≥1280 | ≤2.0 | ≥3.5 | Take a one-meter PC bar and place it on a flat surface, and the maximum natural rise of inside chord and arc is less than 5.0 mm. |
≥7.0 | No damage and defects which will influence the use is allowed on the surface of the PC bar. Floating rust is allowed. |
| 9 | 62.4-66.5 | ||||||||
| 10.7 | 87.8-93.6 | ||||||||
| 12.6 | 121.9-130.1 | ||||||||
| 14 | 150.2-160.1 |
On-line equipment
Pay-off stand→ Wire pack up device→ Mechanical descaling→ Drawing dies box→ Drawing machine→ Straightening→ 1# Cleaning machine→ Traction machine→ 600kW/8kHz IGBT）Pre-heating power supply（600kW/8kHz IGBT Intermediate frequency induction heating power supply）→ （200kW/30kHz IGBT）Temperature pre-raising power supply（200kW/30kHz IGBT Superaudio induction heating power supply）→ （200kW/50kHz IGBT）Temperature raising power supply（200kW/50kHz IGBT Superaudio induction heating power supply）＋Quenching/Holding→ Quenching water tank→ （300kW/8kHz IGBT）Tempering power supply（300kW/8kHz IGBT Intermediate frequency induction heating power supply）＋Tempering and holding pipe→ Tempering water tank→ 2#Traction machine→ Wire leading tank→ Wire leading tank→ 1 Take-up disc 1→ 2 Take-up disc 2
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