The manufacturing process of S690QL steel equivalent to grade 50

The weldability of S690QL steel equivalent to grade 50 is good. It means that under certain process and construction conditions, S690QL steel equivalent to grade 50 can obtain good performance after welding. Weldability is a measure of the hot workability of steel. Weldability can be divided into weldability in construction and weldability in use. Weldability in construction refers to the sensitivity of cracking in weld metal and near seam zone, and hardening sensitivity of steel in near seam zone. Good weldability means that under certain welding process conditions, the weld metal and steel near the seam do not produce cracks. Weldability in use means that the mechanical properties of weld and HAZ steel are not lower than those of base metal.

The spot price of hot rolling steel rose on August 18, with a large overall increase. The average price of major cities in China is 3624 yuan / ton, up 95 yuan from last Friday. Shanghai 3520-3540 yuan / ton increased by 70 yuan, Tianjin 3600-3620 yuan / ton increased by 150 yuan, and Lecong 3650-3660 yuan / ton increased by 150 yuan. Central and southern China, North China and Northeast China rose by 90-150 yuan, while Western China rose by 30-60 yuan. The rise in spot S690QL steel equivalent to grade 50 prices led to a significant increase in transactions across the region. Hot rolled futures remained at a high level after opening up and closed at 3440, up 75 2.23%.

ASTM A992 steel S690QL steel equivalent to grade 50 is recognized as the most suitable steel for wide flange beam in the world. It contains a variety of alloy elements, such as vanadium, niobium, copper, nickel, chromium and molybdenum, which greatly improve S690QL steel equivalent to grade 50 its strength and other properties. For example, the mechanical properties are much better than the tensile strength 65ksi and yield strength 65ksi of a572-50 and A36. Therefore, A992 wide flange beam (H beam) generally replaces a572-50.

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