BBN supply standard of nm450 wear-resistance cold bending performance

The weight of seamless steel pipe is only 1 / 5 of that of square steel. Seamless steel pipe corrosion resistance acid, alkali, salt and atmospheric environment corrosion, high temperature resistance, good impact and fatigue resistance, do not need regular maintenance. The effective service life of product standard of NM450 wear-resistance more than 15 years.

According to the data released by the Japan iron and Steel Union (JISF), the export volume of Japanese steel in the second quarter of 2020 standard of NM450 wear-resistance is about 4.959 million tons, a year-on-year decrease of 14.2%; the export volume in the first half of 2020 is about 11.07 million tons, with a year-on-year growth of 1.8%. It has been revealed that the year-on-year increase in export volume does not mean that Japan's export standard of NM450 wear-resistance situation of Pugang is better in the first half of the year, but only because the base number of the same period last year is too low.

Hot-rolled steel sheet / cold-rolled steel sheet: Steel ingots or slabs are difficult to deform at normal temperature and difficult to process. They need to be heated to 1100 ° C to 1250 ° C for rolling. This standard of NM450 wear-resistance rolling process is called hot rolling. Rolling at room temperature is generally understood as cold rolling. However, from the point of view of metallurgy, the boundary between hot rolling and cold rolling should be distinguished by the temperature of metal recrystallization, that is, rolling below the recrystallization temperature is cold rolling; Rolling above the recrystallization temperature is hot rolling.

Executive Standards of our standard of NM450 wear-resistance, steel plate products: according to the user's requirements, the steel plate can be delivered according to the following standards: national standards, metallurgical industry standards, American ASTM, ASME standards, Japanese JIS, German DIN, British BS, European EN, international ISO standards and relevant standards of special plate. The ship plate can be certified by ABS LR DNV CCS BV KR NK GL RINA.