26SiMnMo (GY5) is armored bulletproof steel, code-named GY4, with good ballistic performance, welding performance and mechanical processing performance. It is suitable for combat command vehicles, explosion-proof vehicles, currency transport vehicles, bulletproof trucks, bulletproof cars, explosion-proof doors, and machines. Need a safe and so on. According to the clients’ requirements, the steel plates with a thickness of more than 10mm can be subjected to ultrasonic inspection one by one, and the acceptance level should be indicated in the contract.
In today's A514 grade P quenched and tempered steel steel market, most of the varieties are in excess of demand, especially after China's accession to the WTO, steel enterprises are facing increasingly fierce market competition. In order to make enterprises win a good survival and development space, operators must make effective use of A514 grade P quenched and tempered steel market information resources to improve the scientificity of business decision-making and enhance the enterprises' domestic competitiveness Competitiveness in the external market.
Cold rolled A514 grade P quenched and tempered steel steel sheet can be produced by two high mill, four high reversing mill, multi high reversing mill and tandem cold mill. Although there are still only two work rolls in four high and multi high rolling mills, each work roll is supported by one or more large diameter backup rolls, which can prevent deflection of work roll. As a result, wide and thinner A514 grade P quenched and tempered steel steel plates can be produced. For example, 20 high mill can produce as thin as 0. 001 mm sheet, but the two high mill can only produce as thin as 0. 35mm sheet
The composition characteristics of low alloy high strength steel are low carbon ≤0.20%, low alloy, and total alloying elements is less than 3%. The low carbon content is to meet the process performance requirements of A514 grade P quenched and tempered steel, low alloy high strength steel for engineering structural parts such as plasticity, toughness, weldability and cold deformation; adding a small amount of alloying elements (mainly Mn) to achieve the purpose of improving mechanical properties. Mn not only has a significant strengthening effect on ferrite, it can also reduce the cold brittle temperature of steel, increase the amount of pearlite in the steel, and further improve the strength.
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