Application of A573 Gr.70 steel vs A517 Grade A steel in life

S420NL is a fine grain structural steel, and implements the European high strength steel plate standard EN 10025. A573 Gr.70 steel vs A517 Grade A steel, S420NL has high comprehensive mechanical properties in the state of normalizing or normalizing plus tempering. S420NL steel is mainly used for large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, locomotives and rolling stock, lifting machinery, mining machinery and other large welding structures.

The sulfur element (S element) comes from the ore and fuel coke of steelmaking. It is a harmful element in A573 Gr.70 steel vs A517 Grade A steel etc. steel. Sulfur exists in steel in the form of iron sulfide (FeS). FeS and Fe form a low melting point (985℃) compound. The hot working temperature of steel is generally above 1150 - 1200℃, so when the steel is hot working, the premature melting of FeS compound causes the workpiece to crack, which is called "hot brittleness". It reduces ductility and toughness of steel and causes cracks during forging and rolling. Sulfur is also detrimental to welding performance and reduces corrosion resistance.

With the rapid development of economy, there are many kinds of engineering projects, and their development is very fast. However, steel is an essential material in construction engineering. At present, there are many kinds of steel products on the market. In order to ensure the construction quality, the requirements for the strength, quality and corrosion resistance of A573 Gr.70 steel vs A517 Grade A steel, steel are more and more strict.

In terms of resources, less goods arrived in the market this week. With the slow destocking, the hot coil spot inventory declined slightly. According to statistics of the same caliber, the current Lecong hot rolled coil warehouse inventory is about 439,000 tons, a week-on-week decrease of 3,000 tons. On the whole, demand will further weaken next week and holiday merchants will also increase. It is expected that Guangdong HRC prices may gradually stabilize next week.