In order to meet market requirements, the wide and thick plate division combined with the technical center department to roll 8mm extreme specification L360M (B2) pipeline steel.

The extremely thin specifications (8-10mm) of medium and thick plates have a large market demand and a strong ability to create benefits, however, there is a big problem with how we control the plate shaping in the production. The production difficulty of this type of steel plate is that the thin plate cools down quickly during rolling, and has high plastic resistance, uneven deformation, and strong sensitivity, therefore the steel plate is prone to defects such as buckling, wave shape, head, and tail buckling, sickle bend, and dovetail.

In the early stage of production, the wide and thick plate division organized cadres, and technical and operating personnel to hold an extreme specification rolling preparation meeting, discuss and analyze each process detail, and carefully formulate a test plan to ensure the smooth development of the product.

During the production process, the technical personnel closely monitor the key points of production, adjust the heating temperature of the slab in time, appropriately increase the rough rolling speed to reduce the temperature drop, reduce the thickness of the intermediate slab, and ensure that the temperature at each position is uniform during the finishing rolling process. They used the good plasticity of austenite in the high-temperature zone to reduce the bounce and deformation of the rollers and they finally ensured that the surface quality, plate shape, and performance indicators of the 8mm limit material L360M (B2) pipeline steel met the technical requirements.

The successful rolling of the 8mm limit material L360M (B2) pipeline steel not only helped the group improve its market competitiveness but also accumulated experience for the rolling of other types of steel to extremely thin specifications.