Q460GJ plate is a kind of steel plate for building structure. The grades are Q460GJB, Q460GJC, Q460GJD, Q460GJE. When the Q460GJ steel plate is required to have thickness direction properties, the symbols Z15, Z25, Z35 representing the thickness direction performance levels are added after the above-mentioned grades. Q460GJ steel implements the standard GB/T19879.
Chemical composition of Q460GJ steel (mass fraction)/%
| Q460GJ | C | Si | Mn | P | S | V | Nb | Ti | Als | Cr | Cu | Ni | Mo |
| BC | 0.20 | 0.55 | 1.70 | 0.025 | 0.015 | 0.20 | 0.11 | 0.03 | ≥0.015 | 1.20 | 0.50 | 1.20 | 0.50 |
| DE | 0.18 | 0.55 | 1.70 | 0.020 | 0.010 | 0.20 | 0.11 | 0.03 | ≥0.015 | 1.20 | 0.50 | 1.20 | 0.50 |
Mechanical properties of Q460GJ steel plate
| Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation | Longitudinal impact | |||||
| Thickness | 6-16mm | 16-50mm | 50-100mm | 100-150mm | Thk≤100mm | 100-150mm | % | Temperature | Energy |
| Q460GJB | ≥460 | 460-600 | 450-590 | 440-580 | 570-720 | 550-720 | ≥18 | 20℃ | 47J |
| Q460GJC | ≥460 | 460-600 | 450-590 | 440-580 | 570-720 | 550-720 | ≥18 | 0℃ | 47J |
| Q460GJD | ≥460 | 460-600 | 450-590 | 440-580 | 570-720 | 550-720 | ≥18 | -20℃ | 47J |
| Q460GJE | ≥460 | 460-600 | 450-590 | 440-580 | 570-720 | 550-720 | ≥18 | -40℃ | 47J |
Heat treatment of Q460GJB Q460GJC Q460GJD Q460GJE construction steel plate:
Q460GJ steel plate is usually in the state of controlled rolling, normalizing, normalizing + tempering, quenching and tempering, TMCP, TMCP + tempering
Q460GJB Q460GJC Q460GJD Q460GJE construction steel plate size, shape and allowable deviation shall comply with the provisions of GB/T709, and the allowable deviation of thickness shall comply with the provisions of Class B in GB/T709. Class C can be agreed between the supplier and buyer. The Q460GJ steel plate is delivered according to the theoretical weight, and the average thickness of the theoretical weight is adopted.
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