The basic principle of KA 32 crane vessel steel, heat treatment of steel: put the metal workpiece in a certain medium and heat it to a suitable temperature, keep it in this temperature for a certain time, and then cool it at different speeds. Objective: to obtain the desired structure and properties by means of heating, heat preservation and cooling, so as to make the metal workpiece have the required mechanical, physical and chemical properties.
DH690 plate is a steel plate with a thickness of no more than 150 mm for the manufacture of ships, fishing vessels and marine engineering structures in ocean, coastal and inland navigation areas. The KA 32 crane vessel steel, DH690 steel plate with Z-direction requirements is suffixed with Z25 and Z35, which is used as ultra-high strength ship and marine engineering structural steel. Chemical composition of DH690 steel plate: C ≤ 0.21, Si ≤ 0.55, Mn ≤ 1.7, P ≤ 0.025, S ≤ 0.025, N ≤ 0.02.
In the first ten days of February 2020, the key statistics show that steel enterprises produce a total of 19.3943 million tons of crude steel, 17.9747 million tons of pig iron, 17.5904 million tons of steel and 3.225 million tons of coke. This ten day average daily output of KA 32 crane vessel steel crude steel is 1939400 tons, down 2.68% on a month on month basis, up 3.16% on a year-on-year basis; steel is 1759000 tons, down 9.09% on a month on month basis, up 2.51% on a year-on-year basis.
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.
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