Identification of Nonmetallic Inclusions and Their Influence on the Properties of X80 Pipeline Steel

According to GB/T 10561-2005 and referring to some testing examples,forms and features of typical inclusions in X80 pipeline steel were introduced,and the influence of these inclusions on the properties especially the welding performance was analyzed. The results show that the test X80 pipeline steel contained type A,B,C,D and DS conclusions which were described in GB/T 10561-2005. the welding performance was very much under the influence of the inclusions,besides mechanical and anti-corrosion properies.