Good weldability of API 5L PSL2 Gr.B pipeline steel is very important to ensure the integrity of pipeline and field welding quality.One of the most remarkable features of the development of API 5L PSL2 Gr.B pipeline steel in modern times is the continuous reduction of carbon content in steel. Adding trace titanium can restrain the toughness drop in the affected area and improve the API 5L PSL2 Gr.B pipeline steel welding performance. The difficulty and emphasis is on high resilience. With the continuous development of oil and natural gas transportation, the requirements for the performance of oil API 5L PSL2 Gr.B pipeline steel are constantly improved, especially for the toughness.
The improvement of these properties requires the content of impurity elements C, S, P, O, N and H in API 5L PSL2 Gr.B pipeline steel to be reduced to a very low level. High strength and high toughness are ensured by the bainitic ferrite structure obtained through the cooling control technology. Meanwhile, the carbon content in the API 5L PSL2 Gr.B pipeline steel should be reduced and non-metallic inclusions in the steel should be removed as much as possible to improve the purity of the API 5L PSL2 Gr.B pipeline steel. Among them, carbon content should not be higher than 0.09%, sulfur content should be lower than 0.005%, phosphorus content should be lower than 0.01% and oxygen content should not be higher than 0.002% in API 5L PSL2 Gr.B pipeline steel.
API 5L PSL2 Gr.B pipeline steel has good welding performance. If you have any need in API 5L PSL2 Gr.B pipeline steel, please contact us. We can supply API 5L PSL2 Gr.B pipeline steel according your requirement. Welcome to contatc us, Katalor is the best choose for you.
