APPLICATION OF ORDINARY CARBON STRUCTURAL STEEL

Ordinary carbon structural steel by oxygen converter, open hearth furnace or electric furnace smelting, steel plate, steel strip, rolled into the general section and bar. Hot rolled steel general with (including rolling control) or normalizing treatment delivery. The chemical composition, tensile properties, impact work and cold bending properties of the steel should be in accordance with the relevant provisions.

In the Chinese national standard GB700-88, this kind of steel is divided into 5 grades according to the yield point, and is divided into 4 grades according to the quality. The grade is composed of 4 parts: the letter Q representing the yield point, the value of the yield point, the quality grade symbol and the method of the.

Ordinary carbon structural steel has a very wide range of applications, most of which are used for welding, riveting or bolted steel structures, a few for the production of a variety of machine parts. Low intensity of Q195, Q215 steel used for the production of low carbon steel wire, steel wire mesh, roof panel, welded steel pipe, anchor bolts and rivets. Q235 steel is of medium strength, and has good plasticity and toughness, and is easy to be formed and welded. This kind of steel is often used as reinforcement and steel structure, also used as rivets, a railroad spike and various mechanical parts, such as bolts, rod, connecting rod and so on. Q255, Q275 high strength steel for the production of agricultural machinery, but also can be used as reinforcement and railway fishplate.

According to requirements of some industrial use of the special properties of steel and ordinary carbon structural steel component minor adjustments to the formation of a series of professional steel, such as rivet and screw steel, steel bridge, pressure vessel steel, hull steel, boiler steel. Professional steel in addition to strict control of chemical composition, to ensure that the conventional performance, but also provides some special inspection projects, such as low temperature impact toughness, aging sensitivity, steel in gas, inclusion and fracture, etc..