• China Best Exporting Unbonded Prestressed Strand 12.7mm
  • China Best Exporting Unbonded Prestressed Strand 12.7mm
  • China Best Exporting Unbonded Prestressed Strand 12.7mm
  • China Best Exporting Unbonded Prestressed Strand 12.7mm
  • China Best Exporting Unbonded Prestressed Strand 12.7mm
  • China Best Exporting Unbonded Prestressed Strand 12.7mm

China Best Exporting Unbonded Prestressed Strand 12.7mm

After-sales Service: Free Return of Parts
Warranty: 12 Momths
Material: Low-Carbon Iron Wire
Cross Sectional Shape: Round
Application: Construction Wire Mesh
Type: Steel Coil
Customization:

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Basic Info.

Model NO.
unbonded 12.7mm, 15.24mm, 17.8mm, 21.7mm
Wide in Width
1.6M
Surface Treatment
Coated
Metal Wire Drawing
Hot Drawing
Status
Hard State
Thickness
Metal Thick Wire
Transport Package
Water Proof Woven Bag and Wooden Case Pallet
Specification
ASTM, SGS, KS
Trademark
ETERNOO
Origin
Chna
Production Capacity
200 Tons/Day

Product Description

China Best Exporting Unbonded Prestressed Strand 12.7mm
China Best Exporting Unbonded Prestressed Strand 12.7mmSpecifications Of Unbonded Prestressed Tendons 12.7mm
( UPS 12.7-1860)
A. Prestressed Steel stand 1*7wire Specifications:
( standard: ASTM A416/A416M-06 or GB/T 5224-2003)
 
Grade Norminal
Dia.(mm)
Tolerance
(mm)
Cross section area(Sn/mm2) Re. mass per 1000m(kg/1000m) Minimum braking load(KN) Minimum Load at 1% Extension (KN) Elongation
(%) Lo≥610mm
The relaxation at 1000h(Initial load to 70% of norminal max load)( r%)
Low relaxation Norminal relaxation
270(1860) 12.70 +0.65
-0.15
98.71 775 183.7 165.1 3.5 2.5 3.5
B.  Grease Specifications:
The anti-corrosion grease used for making producing unbonded steel strand, should have good chemical stability.
1. no erosion effect to around material,;
2. water proof; 
3. good lubrication performance, reducing the friction resistance;
4. won't flow when high heat, and no embrittle when low cold if within the rated temperature range(-20ºC~+70ºC).  
5. The grease property should conform to JG3007-1993, test standard should according to below Table 1.
Table 1:
 
ITEM QUALITY INDEX TEST STANDARD
I II
Work cone penetration 1/10mm 296~325 265~295 GB/T 269
Dropping point ºC ≥ 160 160 GB/T 4929
Moisture, %, ≤ 0.1 0.1 GB/T 512
Steel grid of oil(100ºC,24h) % ≤ 8.0 8.0 GB/T 0324
Corrosion test (100ºC,24h, 45# steel) qualified Qualified GB/T 0331
Evaporation (99ºC,22h) % h ≤ 2.0 2.0 GB/T 7325
Performance on low temperature(- 40ºC, 30min) Qualified Qualified  
Damp heat test ( 45# steel, 30D) ≤ class 2 2 GB/T 2361
Salt fog test (45# steel, 30D) ≤ class 2 2 SH/T 0081
Oxidation stability (99ºC, 100h,78.5*104)
 
A: pressure drop after oxidation, Pa ≤
B:acid value after oxidation, mgKOH/g ≤
 
 
14.7* 104
1.0
 
 
14.7*104
1.0
 
 
SH/T 0325
GB/T264
Compatibility to sleeve (65ºC,40D)
A : oil absorption, %  ≤
B: change rate of tensile strength % ≤
 
10
30
 
10
30
 
HG2-146
GB1040
C. Sheathing Specification 
1. Material : HDPE, no erosion effect to around material, water proof, within rated temperature( -20ºC~+70ºC), no embrittle when low cold, and good chemical stability when high temperature.
2. It should never mix with other material which will affect sheathing performance.
3. The sheathing color should be black, can be other color as customized, but must not to use color which will reduce sheathing performance.
4. The thickness should be uniform, 0.8mm~1.0mm.
5. The outer appearance of sheathing should be smooth, no sinking, strand outline not visible, no break, no air vent, no obvious fold, no machinery damage. 
6. Sheathing: tensile strength ≥ 30Mpa; yield strength ≥10Mpa, breaking strength  ≥600Mpa
7. If there is very small damage, it can be fixed by water-proof PE tape.
 
 
Spec. Tensile  strength (Mpa) Section Area(mm2) Grease mass per meter(g/m) Minimum thickness of coat(mm) Friction factor(μ) Effect modulus(κ) Tendon mass per meter(kg/m)
1*7-12.7mm 1860 98.71 43 1.0 0.04~0.1 0.003~0.004 0.875
  China Best Exporting Unbonded Prestressed Strand 12.7mm China Best Exporting Unbonded Prestressed Strand 12.7mm

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