Our marine steel CCS Grade A hot rolled plates, GL-A hot-rolled steel strip specification available now has 6*3300*4000, 5*1500*4500, 12*2700*9600, 9*3200*10400, 11*1790*7990, 6*3380*4600, 5*1500*11700, 12*2700*9000, 12.5*3390*9260, 13*1750*8400, 7*3620*9700, 12*2500*8350, 14.5*1830*6300, 15*3000*4200, 20*2750*5000, 7*1760*4250, 12*3000*10500, 12*3660*6070, 13*2000*4700, 13*2810*4100, 17*1910*7860, 12*2700*11450, 12*3800*9740.
Our company's GL-A hot-rolled steel strip power boilers, heating furnaces of double bars, double high lines and medium and thick plates all adopt heat storage technology, which can fully use blast furnace gas; the ladle baking, Maerz active lime kiln and medium and thick plate heat treatment furnace all burn converter gas, which can improve the GL-A hot-rolled steel strip utilization rate of secondary energy and realize negative energy steelmaking in steelmaking process.
Blast furnace ironmaking is a traditional ironmaking method based on coke energy. It cooperates with converter steelmaking and is the main method of producing GL-A hot-rolled steel strip steel at present. This dominance of blast furnace ironmaking is not expected to change for quite a long time. The essence of blast furnace ironmaking is the reduction of iron. Besides, coke is used as fuel and reducing agent. At high temperatures, iron ore or iron-containing raw materials are reduced from an oxide or mineral state to liquid pig iron.
The sulfur element (S element) comes from the ore and fuel coke of steelmaking. It is a harmful element in GL-A hot-rolled steel strip 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.
Our quality and service commitment: GL-A hot-rolled steel strip product quality problems, life-long replacement.In the process of using, any time if you find we supplied steel materials not conform to the requirements of technical standards, we can replace it for you free of charge. However, it should be noted that non product quality problems caused by improper use are not covered by the warranty. Please pay attention to the service time commitment as well as the product quality assurance commitment. Because only the products of big brands and reliable enterprises with complete after-sales service system can truly realize the long-term product quality assurance and the whole process of service.
Leave a Message