Specification:
Standard: The steel PC bar of our company accords with JISG3137-1994(Japan) and GB/T5223.3-2005(China).
1>The original material of PC BAR
Chemical composition of 30MnSi
C:0.27-0.34;Si:0.60-1.10;Mn:0.90-1.30;P:＜0.025 ;S:＜0.025;Cu:＜0.025
2> Manufacturing process flow
Material-descaling-keepstraight-drawing-knurling-heat-quenching-heat-tempering-test-packing
3>Grad and technological properties
Nominal diameter: ?7.1、?9.0、?10.7、?12.6
Tensile strength ≥ 1420Mpa
Yield strength ≥ 1275Mpa
Elongation ≥ 5%
Low relaxation ≤ 1.5%
Straightness ≤ 2mm/m
Net weight per coil: 1000Kg±100Kg