Gao Jiangang Q420GJC steel plate performance, Q420GJC steel plate fixed rolling, Q420GJC steel plate cutting and blanking
Q420GJC belongs to the steel plate used in the building structure, the implementation standard GB 19879-2015, Q420GJC steel plate can be hot-rolled, normalized, normalized rolling, normalized + tempered, quenched + tempered, TMCP, and the delivery status can also be specified according to technical requirements. The size, shape, weight and allowable deviation of Q420GJC steel plate shall comply with the provisions of GB T 709, and the negative deviation of thickness shall be limited to -03mm。
Q420GJC steel plate thickness direction performance requirements: Z15, Z25, Z35.
Q420GJC steel plate flaw detection requirements: one probe, two probe, three probe.
According to the different impact temperatures, Q420GJ is divided into four grades: Q420GJB, Q420GJC, Q420GJD and Q420GJE. Q420GJ series steel is often used in high-rise, super high-rise, long-span and other steel structure buildings due to its high strength, good resistance and low yield ratio.
Chemical composition of Q420GJC Gao Jian Steel:
c ：≤0.20，si： ≤0.55，mn：≤1.70，p ：≤0.025，s ：≤0.015，cr ：≤0.80，ni： ≤1.00，cu：≤0.30，mo ：≤0.50，v ：≤0.2-0.10，ti ：≤0.03，nb ：≤0.07，al ：≥0.015, Q420GJC mechanical properties of Gao Jiangang: different thicknesses, different performance values.
Yield strength (MPa) 400, tensile strength (MPa): 510-680, elongation (%)20, impact absorption work (J) 47, yield ratio: 083，
Q420GJC steel plate has been widely used in bridges, buildings, and other fields. In terms of bridges, Q420GJC steel plate is used to manufacture large bridge structures, such as high-speed railway bridges, cross-sea bridges, etc., and its excellent impact resistance and durability ensure the safety and service life of bridges. In terms of construction, Q420GJC steel plate is used in the manufacture of high-rise buildings, factories and other buildings, and its high strength and excellent toughness can effectively improve the seismic performance of buildings.