A514 grade H alloy steel plate, 14MnNbq plate is a structural steel plate for bridges, which is a low-alloy high-strength steel. 14MnNbq is a special steel plate for the manufacture of bridge structural parts. The end of the steel grade marked with q is the acronym for bridge. The thickness of the bridge steel plate is 6-60mm, which is used to make riveted and bolt-welded structure of road bridges and railway bridges, including sea-crossing bridges.
Oxygen is a harmful element in A514 grade H alloy steel plate steel. With the increase of oxygen content, the strength of A514 grade H alloy steel plate steel increased, but the plasticity, especially the toughness, decreased significantly, and the weldability became worse. The presence of oxygen causes hot brittleness of A514 grade H alloy steel plate steel.
BBN Group's first blast furnace blast dehumidification system: The project started construction on May 2 and began trial operation on August 28. All data are balanced and stable, blast furnace output indicators have improved significantly, and the daily dehydration capacity of the two blast furnaces is as high as 124 tons, with a daily increase of about 200 tons A514 grade H alloy steel plate, and the blast furnace is running smoothly.
Generally, the production process of A514 grade H alloy steel plate seamless steel tube can be divided into cold rolling and hot rolling. The production process of cold-rolled seamless steel tube is generally more complicated than that of hot rolling. The tube blank must be first rolled by three rolls, and then be subject to sizing test and cutting after extrusion. Then enter the annealing process. In appearance, the cold-rolled seamless steel tube is shorter than the hot-rolled seamless steel tube, and the wall thickness of the cold-rolled seamless steel tube is generally smaller than that of the hot-rolled seamless steel tube, but the surface looks brighter than the thick wall seamless steel tube, the surface is not too rough, and the diameter is not too much burr.
