Made by plain carbon structural steel, low alloy structural steel plate or steel strip, cold formed steel is processed further in cold reduction mills, where the material is cooled (at room temperature) followed by annealing or tempers rolling. This increases the steel strength and straightness through strain hardening and produce steel with closer dimensional tolerances and a wider range of surface finishes.
Cold forming steel sections came in a variety of shapes such as beams, columns, channels and angles and hollow sections. According to the cross section shape, they can be divided into three types: opening, semi-closed and closed types. They can be cold forming channel steel, Angle steel, Z section steel, square tubes, rectangular tubes, welding irregular-shaped tubes and rolling door, etc and can be up to more than 400 kinds.
Generally speaking, The ordinary cold-formed steel is not more than 6mm in thickness and 500mm in width. The common used cold formed steel sections including: Equilateral Angle steel (25 ~ 75mm in length), inner rolled edge Angle steel (40 ~ 75mm), channel steel (25 ~ 250mm), inner rolled edge channel steel (60 ~ 250mm high), rolled edge Z steel (100 ~ 180mm high).
Many section steel shapes take the form of an elongated beam having a profile of a specific cross-sectional area and thus can support a high load without excessive sagging. Cold formed steel section is used for any project where tolerances, surface condition, concentricity, and straightness are the major factors such as highway guardrail, steel structure, automobile, container, scaffold, railway vehicle, ship and bridge, steel sheet pile, transmission tower and others areas. Different industries have different requirements in practical application:
Automobile manufacturing industry: Buses equipped with sealed rectangular or special shaped steel; truck with opening cold formed steel; special vehicles such as fire trucks and engineering vehicles with rectangular pipes or special-shaped etc. Power industry: structure steel with property of high-strength and corrosion resistant has been used in high-voltage long-distance transmission tower. Engineering machinery: crane lifting arm, support arm, tower crane frame, etc. Construction industry: steel structure (beam, column), scaffolding, roof, wall, doors and Windows, etc. Furniture: stool, chair, cabinet, bed, etc.
Cold formed steel sections are usually smaller, stronger and with a better surface finish than similar products that are hot formed, also the sections can be supplied with a galvanized surface. Further steel information and prices, email email@example.com to learn more！