Miner's SteelWhat is the difference between miner's steel and I-beam steel? People often ask why miner's steel and I-beam steel have similar shapes. How should they be chosen in practical applications? Here is a detailed answer. Many people believe that it is called miner's steel domestically and H-shaped steel abroad. In fact, this understanding is incorrect.

The shape of H-shaped steel is different from miner's steel; miner's steel is a single "I" type steel. The inner surfaces of the upper flange and lower flange have an inclination, usually 1:6, making the flange thin on the outside and thick on the inside. The characteristics of the cross-section of the main plane differ greatly, making it difficult to fully utilize the strength characteristics in applications. Although thickened miner's steel has also appeared in the market, the structure of miner's steel determines its short torsional plate. H-shaped steel is widely used in today's steel structure buildings and has many differences compared to miner's steel. The single flange is a flange plate, while the other single flange plate has no inclination on the inner surface, and the upper and lower surfaces are parallel. The cross-sectional performance of H-shaped steel is significantly better than that of traditional miner's steel, channel steel, and angle steel. The content on metal processing WeChat is good and worth following.

H-shaped steel is a single, economically efficient profile, with a more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. The two outer edges of H-shaped steel have no slope; they are straight. This makes welding and splicing H-shaped steel easier than miner's steel, and the mechanical performance per unit weight is better, saving a lot of materials and construction time. The cross-section of I-beams has good resistance to direct pressure and tension, but due to the narrow flange plates, the cross-sectional dimensions cannot resist torsion. In contrast, H-steel has its advantages and disadvantages.

Differences between H-shaped steel and miner's steel:

1. Miner's steel is a regular or light type. Due to the relatively high and narrow cross-sectional dimensions, the moment of inertia of the two main sleeves in the cross-section differs greatly. Therefore, it can only be used directly. It is not suitable for axial compression components or components that are perpendicular to the web plane and have an inclined arc, so its application range is very limited.

2. H-shaped steel is a single, efficient, and economical cutting profile (others include cold-formed thin-walled steel, profiled steel plates, etc.). Due to the reasonable cross-sectional shape, they can make steel more effective and improve cutting capabilities. Unlike ordinary I-beams, the flanges of H-shaped steel are widened, and the inner and outer surfaces are usually parallel, making it easy to connect with other components using high-strength bolts. The size composition series is reasonable, and the models are complete, making it convenient for design and selection.

Due to the relatively high and narrow cross-sectional dimensions of ordinary and light I-beams, the difference in the moment of inertia of the two main sleeves in the cross-section is significant. It is not suitable for axial compression components or components that are perpendicular to the web plane and have an inclined arc, which makes its application range very limited. The use of I-beams should be selected according to the requirements of the design drawings.