What Is A Crane Rail

The crane running track includes crane rails, railway rails, and square steel. The top of the rail is convex, and the bottom is a flat plate with a certain width, which increases the contact surface with the foundation. The cross-section of the rail is mostly I-shaped, with good bending strength. Square steel can be regarded as flat top steel rails, which are generally only used for cranes with small lifting capacity, slow operating speed, and infrequent work due to their high wear on the wheels. Steel rails are usually rolled from steel with high carbon and manganese content (C=0.15%~018%, Mn=016%~115%). The typical material for crane rails is U71Mn steel. Square steel is mainly made of Q275 square steel or flat steel.

Crane rails are special section rails used for large and small cranes, with standard lengths of 8 types including 9, 915, 10, 1015, 11, 1115, 12, 1215, etc. The common specifications are QU70, QU80, QU100, QU120, and the number after QU represents the width of the track head. Railway rails are divided into two types: heavy rail and light rail, and the specifications of the rails are expressed in nominal weight per meter of length. Steel rails with a weight greater than 30kg/m are considered heavy rails. The standard rail length comes in 12150m and 25100m2 specifications, and the quantity of rails for light rail is not more than 30kg/m, usually ranging from 5 to 12m in length.

Light rail steel is mostly composed of killed and semi killed carbon structural steel. In order to improve the wear resistance and corrosion resistance of rails, low-alloy structural steel with alloying elements such as Mn, Si, and P has been adopted in recent years.