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Common steel bar models
1. HPB300: It is a cold-drawn rolled steel bar model. It is an ordinary steel bar with a diameter between 6-50mm. It is mainly used to strengthen concrete structures and make prestressed components.
2. HRB400: It is a hot-rolled steel bar model, usually with a diameter between 8-32mm. It is mainly used to reinforce concrete structures and make steel skeleton structures.
3. HRB500: It is also a hot-rolled steel bar model with a diameter between 8-32mm. Compared with HRB400, HRB500 steel bars have higher strength and toughness and can better withstand large tensile forces and pressures.
4. HRB600: It is a kind of light rail steel bar and an important material on steel tracks. The diameter is usually between 12-50mm. It has higher corrosion resistance and oxidation resistance. At the same time, its strength and toughness are compared with other steel bars. Also more excellent.
Differences in steel bar diameters
Different types of steel bar diameters also vary. Generally speaking, the diameter of HPB300 steel bars is 6-50mm; the diameter of HRB400 steel bars is 8-32mm; the diameter of HRB500 steel bars is between 8-32mm; and the diameter of HRB600 is usually between 12- between 50mm.
Differences in uses of steel bars
In addition to different types and diameters, different steel bars also have different uses. Among them, HPB300 is mainly used to reinforce concrete structures and make prestressed components; HRB400 is mainly suitable for reinforcing concrete structures; HRB500 is suitable for being the main strength part of large buildings; and HRB600 is mainly used to manufacture steel tracks.
To summarize, there are specific differences between different types, diameters, and uses of steel bars. When purchasing, we need to choose the material that suits us according to our actual needs. At the same time, during the construction process, correct operations also need to be carried out in accordance with regulations.
Classification of stainless steel pipes1. Classification by production method:
(1) Seamless tubes - cold drawn tubes, extruded tubes, cold rolled tubes.
(2) Welded pipe:
(a) Classification by process - gas shielded welded pipe, arc welded pipe, resistance welded pipe (high frequency, low frequency).
(b) According to welding seam - straight seam welded pipe, spiral welded pipe.
2. Classification according to cross-sectional shape: (1) circular steel pipe; (2) rectangular pipe.
Spiral steel pipe stacking requirements1. The principle requirement for stacking spiral steel pipes is to stack them according to types and specifications on the premise of ensuring stable stacking and ensuring safety. Different types of materials should be stacked separately to prevent confusion and mutual erosion;
Difference Between Straight Seam Steel Pipe and Spiral Steel Pipe
Advantages of Using Carbon Steel in ConstructionSteel is an alloy metal, which means it’s a combination of several types of elements. In the case of steel, this is a combination of iron, carbon, and trace elements. It has a number of advantages for construction applications due to the fact that it’s fairly inexpensive to manufacture and has a very high tensile strength.
What determines the type of steel is the ratio of elements used to produce it, and it’s the magic formula of the carbon steel alloy created that makes it preferred for many projects. While there are thousands of different types of steel, these types are generally bucketed into four categories: carbon steel, alloy steel, stainless steel, and tool steel.- Anti-corrosion steel pipe classificationPN8710 anti-corrosion
When there are many types of corrosive media in steel pipes, such as acids, alkalis, salts, oxidants and water vapor, the coating must be chemically inert and resistant to acid, alkali and salt corrosion. The coating film should have a dense structure, good waterproof permeability and strong adhesion. , tough and plump. In this case, IPN8710 anti-corrosion is suitable. 
Global crude steel production fell 4.3% year-on-year in MarchOn April 23, the World Steel Association (WSA) released global crude steel production data for March. In March, crude steel output in the world's 71 countries and regions included in the statistics was 161.2 million tons, a year-on-year decrease of 4.3%. In the first quarter of this year, crude steel output in the world's 71 countries and regions included in the statistics was 469 million tons, a year-on-year increase of 0.5%.
