Introduction:

Ordinary carbon structural steel is also called ordinary carbon steel. The carbon content is 0.06-0.22%, and less than 0.25% is the most commonly used. It belongs to low carbon steel, and each metal grade indicates the lowest yield point of this steel when the thickness is less than 16 mm. Compared with high-quality carbon steel, the restrictions on carbon content, performance range, phosphorus, sulfur and other residual elements are wider.

Scope of application:

This kind of steel has a wide range of applications, most of which are used as welded, riveted or bolted steel structures, and a few are used to make various machine parts. The low-strength steels Q195 and Q215 are used to make low-carbon steel wires, steel mesh, roof panels, welded steel pipes, anchor bolts and rivets. Q235 steel has medium strength, good plasticity and toughness, and is easy to form and weld. This kind of steel is mostly used as reinforcement and steel structure parts, and also used as rivets, railway spikes and various mechanical parts, such as bolts, tie rods and connecting rods. Q255 and Q275 steels with high strength are used to make various agricultural machinery, and can also be used as steel bars and railway fishplates. According to the special performance requirements of some industrial steels, the composition of ordinary carbon structural steel is slightly adjusted to form a series of professional steels, such as riveted screw steel, bridge steel, pressure vessel steel, hull steel and boiler steel. In addition to strictly controlling chemical composition and ensuring conventional properties, professional steel also stipulates some special inspection items, such as low-temperature impact toughness, aging sensitivity, gas, inclusions and fractures in steel.