Chemical and Physical Properties of British Standard H-beam UB/UC

Chemical and Physical Properties of British Standard H-beam UB/UC (S450JO/S460JO)

1、 Introduction to British standard H-beam UB/UC:

British standard for H-shaped steel: EN10025 standard;

There are three main quality levels of English standard H-beam, including S235, S275, S355, S450/S460, etc. For example, S235 and S275 materials represent carbon structural steel, S355 is low alloy steel, and S450/S460 belongs to high-strength steel for construction. The British standard H-shaped steel is an economical and efficient profile with a more optimized cross-sectional area distribution and a more reasonable strength to weight ratio. It is named after its cross-sectional area is the same as the English letter "H". Due to the fact that all parts of H-beam are arranged at right angles, H-beam has advantages such as strong bending resistance, simple construction, cost savings, and light structural weight in all directions, and has been widely used.

2、 British standard H-shaped steel UB/UC, S450JO/S460JO:

Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical composition of the workpiece. Instead, it endows or improves the performance of the workpiece by changing the microstructure inside the workpiece or the chemical composition on the surface of the workpiece. Its characteristic is to improve the internal quality of the workpiece, which is generally not visible to the naked eye.

3、 Mechanical, physical, and chemical properties of British standard H-beam UB/UC:

In order to ensure that metal workpieces have the required mechanical, physical, and chemical properties, in addition to the reasonable selection of materials and various forming processes, heat treatment processes are often essential. Steel is a widely used material in the mechanical industry, and its microstructure is complex, which can be controlled through heat treatment. Therefore, the heat treatment of steel is the main content of metal heat treatment. In addition, aluminum, copper, magnesium, titanium, and their alloys can also be changed through heat treatment to achieve different performance in terms of mechanical, physical, and chemical properties.

4、 Heat treatment process of British standard H-beam UB/UC:

The heat treatment process generally includes three processes: heating, insulation, and cooling, sometimes only two processes: heating and cooling. These processes are interconnected and uninterrupted. Heating is one of the important processes in heat treatment. There are many heating methods for metal heat treatment, using charcoal and coal as heat sources, and using liquid and gas fuels. The application of electricity makes heating easy to control and has no environmental pollution. These heat sources can be used for direct heating, as well as indirect heating through molten salts or gold, as well as floating particles. When metal is heated, the workpiece is exposed to air and often undergoes oxidation and decarburization (i.e., the carbon content on the surface of steel parts decreases), which has a very adverse impact on the surface performance of the parts after heat treatment.

5、 British standard H-beam UB/UC process method:

Annealing is the process of heating a workpiece to an appropriate temperature, using different holding times based on the material and workpiece size, and then slowly cooling it to achieve or approach an equilibrium state of the internal structure of the metal, achieve good process and service performance, or prepare for further quenching. Normalizing is the process of heating a workpiece to a suitable temperature and then cooling it in air. The effect of normalizing is similar to annealing, except that the resulting microstructure is finer and is commonly used to improve the cutting performance of materials. It is also sometimes used as a final heat treatment for parts with low requirements.