Standard and selection guide for steel rails

According to different materials, steel rails for cranes are mainly divided into two types: ordinary carbon steel rails and high-strength manganese steel rails.

Ordinary carbon steel rails are suitable for small cranes and lifting equipment in factories. Their material has low carbon content and relatively low strength. High strength manganese steel rails are suitable for large cranes, bridge cranes, and marine cranes. Their material has a high manganese content and high strength and hardness.

The main materials for steel rails used in cranes are Q235B, Q345B, 55Q, U71Mn, etc. Among them, Q235B is a commonly used material and is suitable for general crane usage scenarios; Q345B is suitable for cranes with high load-bearing capacity and cargo transport vehicles; 55Q is suitable for railway facilities and heavy-duty cranes; U71Mn is suitable for applications such as railway bridges and large cranes.

The specifications of steel rails for cranes are generally 38kg/m, 43kg/m, 50kg/m, 60kg/m, etc., of which 50kg/m is a commonly used specification. According to the carrying capacity and operating speed of the crane, users need to choose the appropriate specifications and models based on their actual situation.

The quality standards for steel rails used in cranes are generally implemented in accordance with GB2585-2007, and must also comply with the following standards:

1. Sampling and inspection: According to the GB/T2101-2008 standard, inspect the chemical composition, mechanical properties, fine structure and other performance indicators of the steel rail to ensure that the product quality is qualified.

2. Dimensional deviation: According to GB2585-2007 standard, measure the length, height, bottom width, top width and other dimensional data of the rail, check whether they meet the specified deviation values, and ensure the accuracy and stability of the rail.