Features and usage of ASTM A709 carbon steel plate sheet

The company adheres to the service concept of "you give the order to me and I leave the satisfaction to you". Over the years, our ASTM A709 carbon steel plate sheet steel products are supplied in time, with reliable quality and perfect and thoughtful after-sales service. Meanwhile, we have huge ASTM A709 carbon steel plate sheet steel stocks all the year round. The company long-term pursues the principle of quality first, customer first, quality for survival, reputation for development, and perfect service to win the users.

The yield rate is a comprehensive technical and economic index in the production of medium and heavy plates such as ASTM A709 carbon steel plate sheet. Increasing the yield rate can not only reduce the loss of metal, but it is also vital to the economic benefits of the steel enterprise. The influencing factors of the yield of medium and heavy plates are various, for example, the variety structure, negative deviation rolling level, plate shape control level, cutting loss, rolling waste and burning loss, etc.

S355J2 steel plate rolling process is controlled rolling process. In the rolling process, the ingot rolling temperature is 1000-1050℃; in the first stage, the low-speed and large reduction rolling process is adopted, the high-temperature stage is 950-1000℃, the ASTM A709 carbon steel plate sheet rolling speed is 1.6-2.0m/s, the single reduction rate is 15-20%, and the cumulative reduction rate is 40-45%, so as to ensure sufficient deformation of ingot. In the first stage, the start rolling temperature is 910-930℃, and the finish rolling temperature is ≤ 870℃.

The unloading of Australian coal has ceased, and the quota for imported coal has been reduced. The domestic coal supply gap has gradually emerged. In the case of high inventories of power plants, there are hidden concerns about subsequent coal transfer channels. At present, there has been an increase in the number of ships that have completed the formalities of anchoring ships at Qin Port and Huanghua Port, indicating that a new round of procurement will kick off, prompting traders to continue to raise prices.