High temperature (creep temperature above) boiler steel plate, generally indicates low alloy heat-resistant steel A588 grade B high strength steel, the commonly used are chrome molybdenum steel, chrome molybdenum vanadium steel, chrome molybdenum tungsten steel, etc. For example, 15CrMoG and 12Cr1MoVG boiler steel plate in GB713 and gr 22 and gr 91 boiler steel plate in ASME SA387/SA387M. High temperature boiler steel plate A588 grade B high strength steel is mainly used to manufacture high temperature pressure parts such as high temperature header end cover, steam pipe plug plate, etc.
Our company's A588 grade B high strength steel 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 A588 grade B high strength steel utilization rate of secondary energy and realize negative energy steelmaking in steelmaking process.
The user of S355NC grade must make sure that his calculation, design and processing methods are appropriate for the A588 grade B high strength steel material. The forming process used must be suitable for the intended application and comply with the state-ofthe- art; it is of fundamental importance to the processing behaviour of this A588 grade B high strength steel steel grade.
At the initial stage of corrosion, the rust layer on the surface of weathering steel is denser than that of carbon steel, A588 grade B high strength steel, and there are relatively few cracks and holes. After 25 days, delamination occurs in some parts of carbon steel and weathering steel, and there is no difference in corrosion products, mainly due to the role of alloy elements in the rust layer. The precipitation of Cu and Cr alloy elements in the weathering rust layer can resist the invasion of moisture and harmful ions in the atmosphere, and further corrosion of steel and base metal can be prevented, so as to achieve the effect of atmospheric corrosion resistance.
We should help solve the customer's problems in time, not just verbally, without solving the problems or shirking the responsibility. Improving after-sales efficiency can make customers feel respect. We should take their problems seriously and show sincerity. It can also give customers a good impression and reduce the negative impact.
