Twisted Prestressed Concrete Steel bar Iron Rod
PC Bar is an important one of our main products, which is mainly used in Large-scale bridges, Freeways, Highways, Mines, High-rise building, Cement products and other construction field with high strength, low usage of metallic material, convenience usage
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Product Description

PC bar for mine anchor cable (mine supporting big diameter PC bar)
This product is heat-treated spiral rib bar with resin anchoring structure for mine anchor cable. Its specifications are φ16.0mm, φ18.0mm, φ20mm, and the tensile strength grade are 1080Mpa, 1270Mpa, and 1420Mpa. The product has the characteristics of high strength, high toughness, low relaxation, total elongation under maximum force Agt≥3.5% and impact absorption energy Akv/J≥32. Its shape is spiral rib. It is a new type of support material that combines the advantages of ordinary resin anchor rod and high-strength PC strand materials. During application, it adopts tensioning method to apply preload and only the tail of the bar is stretched to avoid the torsion of traditional anchor rods caused by applying preload through pre-tightening torque and breakage in shear. The tensioning method can also greatly increase the pre-tightening force and improve support effect. It is a new type of material for mine support. 


Technical parameters of PC BAR


Nominal diameter

7.1mm 9.0mm 10.7mm 12.6mm

Production standard

MS1138:PART 3

Tensile strength

≥ 1420Mpa

Yield strength

≥ 1280Mpa

Elongation

≥ 7.0%

Relaxation

≤ 2.0%

Straightness

≤ 2mm/m

Material

30MnSi , 30Si2Mn , 35Si2Mn , 35Si2Cr

Weight per coil

1ton-2ton


Prestressing scres- thread bars ,   PSB400 , PSB830 PSB930 PSB1080

List of main parameters and reference standards of steel bars for prestressed concrete


 Shape

DNmm 

 Tensile strength levelsMpa

Slack level1000h 

  standard

spiral groove

 6.17.19.0

10.7

 12301420

15701670

 ≤2.5%

 JISG3137

≤2.0%

 BG/T5223.3

 7.49.211.0

13.0

 123014201570

 ≤1.5%

 KSD3505

smooth-surface

 6.17.19.0

10.7

 12301420

15701670

 ≤2.5%

 JISG3137

 ≤2.0%

 GB/T5223.3

 7.49.211.0

13.0

 123014201570

≤1.5%

 KSD3505

Technical parameter standardYB/T111-1997



Nominal Diameter

mm

Diameter

mm

OD allowable deviation

mm

nominal area

m3

theoretical weight

kg/m

7.1

7.25

±0.15

40.0

0.314

9.0

9.15

±0.20

64.0

0.502

10.7

11.10

±0.20

90.0

0.706

12.6

13.10

±0.20

125

0.981

Note: The nominal diameter of special-shaped steel bars is equal to the nominal diameter of smooth round steel bars with the same cross-sectional area.


Code

Tensile Strength

Mpa

yield strengthMpa

Elongation  %

relaxation rate

 %

SBPDL930/1080

1080

930

5

2.5

SBPDL1080/1230

1230

1080

5

2.5

SBPDL1275/1420

1420

1275

5

2.5

Chemical component      %

P 0.030    S 0.035   Cu 0.30

PC Steel bar .jpg

20210710154232_85471.jpg

20210710154206_41329.jpg




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