Application Scope and Introduction of H-shaped Steel

1、 Applicable scope of H-shaped steel

H-shaped steel is mainly used for beam and column components in industrial and civil structures.

◆ Steel structure load-bearing brackets for industrial structures

Steel piles and support structures for underground engineering

Structure of industrial equipment in petrochemical and power industries

◆ Long span steel bridge components

◆ Ship and machinery manufacturing frame structure

◆ Train, car, and tractor beam brackets

◆ Port conveyor belt and high-speed baffle bracket

H-beam is an economical cross-section steel widely used in industries, buildings, bridges, oil drilling platforms, and other fields. It is predicted that the demand for H-beam in China was about 2.5 million tons in 2005 and 5 million tons in 2010. However, the current annual production capacity of H-beam in China is 1.2 million tons, and the market demand is unusually large

2、 Introduction to H-beam classification

H-beams are divided into two types: hot-rolled H-beams and connected H-beams (H). Hot-rolled H-beams are further divided into three types: wide flange H-beams (HW), medium flange H-beams (HM), and narrow flange H-beams (HN)..

HW is the height and flange width of H-shaped steel that are basically equal; Mainly used for steel core columns in reinforced concrete frame structures, also known as rigid steel columns; Mainly used for columns in steel structures

HM is an H-shaped steel with a height to flange width ratio of approximately 1.33 to 1.75, mainly used in steel structures as steel frame columns and as frame beams in frame structures under dynamic loads; For example: device platform

HN refers to the ratio of H-shaped steel height to flange width greater than or equal to 2, mainly used for beams; The use of I-shaped steel is equivalent to that of HN shaped steel;

The main materials of H-shaped steel include Q235B, Sm490, SS400, Q345, Q345B, etc

3、 Structure Introduction

H-beam is a new type of economic building steel. H-shaped steel has an economical and reasonable cross-sectional shape, good mechanical properties, and uniform extension at various points on the section during rolling, with low internal stress. Compared with ordinary I-shaped steel, it has the advantages of large cross-sectional modulus, light weight, and metal saving, which can reduce building structures by 30-40%; Due to the parallel inner and outer sides of its legs and the right angle of its legs, it can be assembled into components, saving up to 25% of the connection and riveting workload. Commonly used in large buildings that require high load-bearing capacity and good cross-sectional stability (such as factories, high-rise buildings, etc.), as well as bridges, ships, lifting and transportation machinery, equipment foundations, brackets, foundation piles, etc.

H-shaped steel is an economical section steel with better mechanical properties developed from the optimization of I-shaped steel, especially named after the same section as the English letter "H". Its characteristics are as follows:

Wide flange and high lateral stiffness. Strong bending resistance, approximately 5-10% higher than I-beam

The two surfaces of the flange are parallel to each other, making it easy to connect, process, and install.

Compared with connecting I-beams, it has low cost, high accuracy, low residual stress, and does not require expensive connection materials and weld seam testing, saving about 30% of the steel structure production cost.

Under the same cross-sectional load, the weight of hot-rolled H-steel structures is reduced by 15% to 20% compared to traditional steel structures.