2-1/2 inch 09cupcrni-a steel specification hr plate price

Rolling of steel plates is the core of the entire steel rolling production process. The billet is deformed by rolling. The rolling process plays a decisive role in product quality. The quality requirements of rolled 09cupcrni-a steel specification products include the three aspects of product geometry and dimensional accuracy, internal organization and performance, and product finish. Finishing: It is the last process in the 09cupcrni-a steel specification rolling process, and it is also a more complicated process. It plays a final role in guaranteeing the quality of the product.

When phosphorus, copper, chromium, nickel and other trace elements are added to the steel, 09cupcrni-a steel specification, a dense and strong adhesive protective film will be formed on the steel surface, which will prevent the corrosion from spreading and developing inward, and protect the substrate under the rust layer, so as to slow down the corrosion rate. The amorphous spinel oxide layer of about 50 μ m ~ 100 μ m thickness formed between the rust layer and the substrate is compact and has good adhesion with the substrate metal.

The volume of coal transferred from ports around the Bohai Sea rebounded slightly, but the overall inventory was low, and coal trading in the market showed a weak supply and demand situation. Moreover, the current state guarantees supply and underpricing signals are relatively clear, and continue to put pressure on the market. In addition, power plant inventories are running at a high level, the weather in southern my country is higher than that of the same period last year, and the terminal continues to accumulate, which has also curbed the excessive rise of coal prices to a certain extent.