What is the notice of preheating before grade 09CuPCrNi-B cutting

Tokyo (Reuters) - Japan's crude steel production is expected to fall 25.9% in the April June quarter from a year earlier, the Ministry of economy, trade and industry said on Thursday. The Ministry of economy and industry quoted an industry survey report as saying that the demand for steel products (including export products) in April June is expected to drop 18.1% to 18.28 million tons from the same period last year. At the same time, grade 09CUPCRNI-B and so on steel exports in the current quarter will decline by 21.4% year-on-year.The surface of alloy steel coil is specially treated during processing. The wear resistance of steel coil and plate made of alloy steel is much better than that of traditional rolling plate, and the cost is also low. The heat resistance and high temperature resistance of alloy steel coil is better than that of traditional rolling plate, and it will not deform easily. Besides, the strength of the grade 09CUPCRNI-B, alloy steel is very high, it is not easy to break and can be used for a long time.20# seamless steel pipe chemical composition: C: 0.07-0.23, Si: 0.17-0.37, Mn: 0.35-0.65, Cr: 0.25, Ni: 0.30, Cu: 0.25. 20# seamless steel pipe mechanical properties: recommended heat treatment temperature: 910℃, tensile strength: 410 MPa, yield strength: 245 MPa, elongation: 25%, impact energy is not required. 20# seamless steel pipe hardness is higher than 10# seamless steel pipe. grade 09CUPCRNI-B, 20# seamless steel pipe has good weldability, no temper brittleness, and its machinability can be improved by water quenching. 20# seamless steel pipe can be used to make welded components, as well as parts with small load after forging, hot stamping and cutting.The after-sales service personnel understand the user's ideas and needs in detail, and stand on the other side's position and interests. Actively communicate with users and help them solve practical problems. This not only solves the service problem, but also improves the customer's trust in the company.