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Introduction of Structural Steel
Introduction of Structural Steel
2023-06-09
Galvanized wire
Galvanized wire
2023-06-13

What is I-beam

beam, also known as steel beam (English name Universal Beam), is a long strip of steel with an I-shaped cross section. I-beams are divided into ordinary I-beams and light I-beams.

Q235 I-beam

Q235 ordinary carbon structural steel is also called A3 plate.

Ordinary carbon structural steel – common plate is a kind of steel material.

Q represents the yield limit of this material, and the following 235 refers to the yield value of this material, which is about 235MPa.

And with the increase of material thickness, the yield value will decrease (thickness/diameter≤16mm, yield strength is 235MPa; 16mm<thickness/diameter≤40mm, yield strength is 225MPa; 40mm<thickness/diameter≤ 60mm, the yield strength is 215MPa; 60mm<plate thickness/diameter≤100mm, the yield strength is 205MPa; 100mm<plate thickness/diameter≤150mm, the yield strength is 195MPa; 150mm<plate thickness/diameter≤200mm, the yield strength is 185MPa).

Due to the low carbon content, the comprehensive performance is better, and the strength, plasticity and welding properties are well matched, and the use is the most extensive.
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The difference between Q235 I-beam and other I-beam

1. Whether the I-shaped steel is ordinary or light, because the cross-sectional size is relatively high and narrow, the moment of inertia of the two main sleeves on the cross-section is quite different. Therefore, it can generally only be used directly on its web Bending members in the plane or form them into lattice-type stressed members. It is not suitable for axial compression members or members that are perpendicular to the web plane and have bending members, which limits its application range.

2. H-beams are high-efficiency and economical cross-section profiles (others include cold-formed thin-walled steel, profiled steel plates, etc.), because the cross-sectional shape is reasonable, they can make the steel more effective and improve the bearing capacity. Different from the ordinary I-shaped, the flange of the H-shaped steel is widened, and the inner and outer surfaces are usually parallel, which makes it easy to connect with other components with high-strength bolts. Its size constitutes a reasonable series, and the models are complete, which is convenient for design and selection.

The difference in terms of material: These two grades are low temperature materials, but the degree of low temperature resistance is different. Q235C is low temperature resistant to 0 °C, and Q235D is low temperature resistant to -20 °C. When you choose steel, you need to make certain judgments about the structural environment. Working at low temperatures requires welding structures. You can choose some low-temperature-resistant materials. After this kind of steel is exposed to low temperatures, there will be no deformation, let alone because of some Environmental problems lead to corrosion of steel, choose the correct grade according to the environment of the steel structure.
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Use

Q235I-beam has good strength, elastic modulus and wear resistance, which can well meet various application requirements and can be expanded to higher high-strength fields. Its advantages are more significant and are favored by many industries. Loved and favored, it has higher high strength, high elastic modulus and wear resistance, which can meet the needs of high-strength applications, it is widely used in aircraft bilge beams, automotive engine parts, automotive tire retainers, railway track plates, etc. industry.

Features

Whether the I-shaped steel is ordinary or light, because the cross-sectional size is relatively high and narrow, the moment of inertia of the two main axes of the cross-section is quite different, so it can only be directly used for bending in its web plane. components or form them into lattice-type stress-bearing members. It is not suitable for axial compression members or members with bending perpendicular to the web plane, which limits its application range. I-beams are widely used in buildings or other metal structures.

Ordinary I-beams and light I-beams have relatively high and narrow cross-sectional dimensions, so the moments of inertia of the two main axes of the cross-section are quite different, which limits their application range. The use of I-beams should be selected according to the requirements of the design drawings.

The selection of I-beams in structural design should be based on its mechanical properties, chemical properties, weldability, structural dimensions, etc., and reasonable I-beams should be selected for use.

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