The steel such as EN10025-4 steel supplier delivered in the hot-rolled state has a certain degree of corrosion resistance due to the high temperature, so it can be stored in the open air. However, this layer of oxide scale also makes the hot-rolled steel surface rough and the size fluctuates greatly. Therefore, the steel with smooth surface, accurate size and good mechanical properties is required to be produced by using hot-rolled semi-finished products or finished products as raw materials and then cold rolling.
The difference between EN10025-4 steel supplier, Q420D steel and Q460D steel: Q420D steel has good mechanical properties and weldability, good cold and hot workability. Q420D steel is mainly used for manufacturing mining machinery, heavy vehicles, ships, bridges, medium and high pressure boilers, vessels and other large welding and structural parts. EN10025-4 steel supplier, Q460D steel has high strength, good plasticity and toughness, good weldability and good cold and hot workability. Q460D steel is mainly used for manufacturing engineering machinery components, such as mining machinery, forklift truck, transport vehicle, bridge, medium and high pressure boiler and other large-scale welding structural parts.
Last week (November 7~November 13), the price of imported iron ore increased overall. The price of external disks rose rapidly, and fell slightly towards the end of last week, and the spot price of the port increased. The price increase of iron ore is more driven by the price increase in the steel market. From the perspective of iron ore fundamentals, iron ore inventories in major ports continue to rise rapidly, steel mills are generally willing to purchase, and it is difficult for prices to continue to rise.