Channel steel is a type of carbon steel structure used in construction and machinery. The allowable deviation of surface quality and geometric shape of channel steel. The general requirement is that the surface should not use harmful defects, and there should be no obvious reverse or adjustable channel waveform bending (rocker) values, as well as various specifications of channel cross-sectional shape related parameters (such as h, b, d, t) values, and tolerance values. The main geometric shapes of channel steel are: collapse angle, leg extension, and leg closure.
The specifications of channel steel products mainly adopt thicknesses such as height (h), leg width (b), waist width (d), etc. Currently, the specifications of channel steel in China range from 5 to 40, which corresponds to a height of 5 to 1000 px. Import channel steel with actual specifications, dimensions, and relevant standards. The import and export orders for channel steel are generally based on the specifications required for use after the corresponding carbon steel number. Except for the specification number, the channel steel does not have a specific composition or performance series.
And we need to understand the delivery status of this product. The conveying length of channel steel is divided into two types: fixed and double regular channel steel. How to select the appropriate channel steel tolerance value is specified in the corresponding standards. The length of domestic channel steel is divided into five to twelve meters, five to nineteen meters, and six to nineteen meters according to different specifications. The length selection range of imported channel steel is generally six to fifteen meters.