Construction Steel

Prestressed Concrete steel bar
We supply the prestressed concrete steel bar under the following items.
STANDARD : JIS G 3137 & GB/T 5223.3-2005
DIAMETER : 7.1mm 9.0mm 10.7mm 12.6mm
GRADE: 30MnSi, 30MnSiB, 35Si, 30Si
Chemical composition of 30MnSi
C   0.27-0.34        S   0-0.025        
Si   0.60-1.10       Cu  0.025      
Mn  0.90-1.30       P   0-0.025        
Tensile strength: ≥1420Mpa
Elongation: ≥7%
Relaxation rate:  ≤2%
Elongation ratio of non-stress:≥1275Mpa  
Straightness:      To one meter steel bar, the max distance of the spring to the arc is no longer than 5mm in natural state.
MANUFACTURING PROCESS FLOW:
Material-descaling-keepstraight-drawing-knurling-heat-quenching-heat-tempering-test-packing
USAGE: The PC steel bar is mainly used for building industry, it is the main steel material in pipe pile foundation, has high strength, low usage of metallic material, convenience usage and the quality was easily promised. It has a extensive usage building industry.