At present, with the improvement of people's living standards, the application of liquefied petroleum gas is more and more common, and the quality requirements of SG295 cylinder steel are also higher and higher.
Therefore, the demand for SG295 cylinder steel is increasing, and our company has high-quality SG295 cylinder steel. However, there are still some problems in the improper production of SG295 cylinder steel.
The welding process of SG295 cylinder steel has an important influence on the formation and propagation of cracks. Improper process will not only lead to coarse brittle structure near the weld of SG295 cylinder steel, but also produce porosity, slag inclusion, incomplete penetration and other defects in the weld, thus creating conditions for the generation and propagation of cracks.
The abnormal structure of the base metal SG295 cylinder steel is the main cause of cracks. The distribution of Fe3C on the grain boundary reduces the ductility and toughness of the material. During the welding process of SG295 cylinder steel, due to the effect of internal stress, cracks develop into macro cracks.
