The cold working performance of A709 Gr 50W structural steel sheet and so on steel structure engineering steel is good, which can ensure that the steel will not crack or brittle fracture during high-temperature processing, and will not have a great impact on strength, plasticity and toughness due to processing. The durability of A709 Gr 50W structural steel sheet and so on steel structure engineering steel is good. Durability refers to the service life of steel structure. The main factor affecting the service life of steel is the poor corrosion resistance of steel, followed by the deterioration of mechanical properties of steel under long-term load, repeated load and dynamic load.
According to A709 Gr 50W structural steel sheet traders in some regions, the downstream purchasing sentiment is maintained, the inventory resources are relatively small, and the A709 Gr 50W structural steel sheet traders are more willing to strike a deal; in addition, the domestic steel mills have issued guidance prices recently, and the long-term upward range is large, which has a boosting effect on the market. In addition, there are A709 Gr 50W structural steel sheet production line maintenance at the end of the month, so the supply side is tight. Overall, the short-term forecast for A709 Gr 50W structural steel sheet will fluctuate mainly upwards tomorrow.
The S355 steel material itself is divided into many grades, so it cannot be said that S355 is equivalent to which grade of the national standard Q345, A709 Gr 50W structural steel sheet. In engineering, usually S355JR steel is equivalent to Q345B steel, S355J0 steel is equivalent to Q345C steel, S355J2 steel is equivalent to Q345D steel, S355N steel is equivalent to Q345D steel, and S355NL steel is equivalent to Q345E steel.
