S460G2+QT steel is a kind of European standard steel plate, which belongs to weldable structural steel for fixed coastal structure. Its delivery state is quenched and tempered (quenched + tempered), and the impact is -40 degree impact test. The 2 after G represents steel The related numbers of this characteristic.The “QT” means quenching and tempering (quenching + tempering), it is just a method of naming steel grades in the standard.
Standard: EN10225-2009
Grade: S460G2+QT
Category: offshore platform steel, marine structural steel
Delivery status: steel plate should be delivered by quenching and tempering (quenching + tempering)
S460G2+QT steel plate performance and requirements
S460G2+QT offshore platform steel was developed on the basis of hull structural steel. The steel platforms originally built were all hull structural steel like the Grade A, B, D, E, AH32, AH36, DH36, EH36. However, with the development of the marine industry, oil development has gradually developed from shallow seas to deep seas, and from warm seas to low-temperature and cold seas. Offshore platforms have to withstand various weather conditions and wind and waves, and suffer from seawater corrosion. The working environment is very harsh. Secondly, the trend of large-scale structure is obvious, the structure is complex, the welding workload is large, and the joint welding is inherently difficult. In addition to the high stress concentration, the structure is in a more dangerous state; and with the large-scale structure, the thickness of the component increases and its damage The danger is getting bigger and bigger. Therefore, in order to ensure the safe and reliable operation of offshore platforms, the steel used has higher requirements than the steel used in the hull structure.
