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The typical representative of steel bars is threaded steel, which is commonly known as hot-rolled ribbed steel bars. The typical representative of steel bars is threaded steel, which can be divided into three categories according to their strength: HRB335, HRB335E, HRB400E, HRB400, HRB500, HRB500E, etc. Class; Among them, H-HOT hot-rolled, R-Ribbed ribbed, B-Bars steel bar; 335 means that the yield strength is not less than 335MPa; rebar can also be classified according to the geometric shape, that is, the section shape of the transverse rib and the spacing of the ribs are different. Classification or classification, such as the British Standard (BS4449), the rebar is divided into Type I and Type II. This classification mainly reflects the grip performance of rebar.

2023-08-18

Steel Mechanical Properties

When the steel or sample is stretched, when the stress exceeds the elastic limit, even if the stress does not increase, the steel or sample still continues to undergo obvious plastic deformation. This phenomenon is called yielding, and the minimum stress value when yielding occurs is for the yield point. Let Ps be the external force at the yield point s, and Fo be the cross-sectional area of the sample, then the yield point σs =Ps/Fo(MPa).

2023-08-18

Difference Between Steel and Iron Compare the Difference Between Similar Terms

The amount of carbon element determines the performance of iron. It can be understood that the higher the carbon content, the harder the iron, but the more brittle; otherwise, it is soft and has good ductility.

2023-08-18

Why should steel products undergo heat treatment

The role of heat treatment is to improve the mechanical properties of materials, eliminate residual stress and improve the machinability of metals. According to different purposes of heat treatment, heat treatment processes can be divided into two categories: preliminary heat treatment and final heat treatment.

2023-08-18

Steel coil processing technology

Iron-carbon alloys containing less than 2% carbon are called steel. The five elements in carbon steel refer to the main components in the chemical composition, namely C, Si, Mn, S, P (carbon, silicon, manganese, sulfur, phosphorus). Secondly, gas will inevitably be mixed in the steelmaking process, including O, H, N (oxygen, hydrogen, nitrogen). In addition, in the aluminum-silicon deoxidation-killing process, Al must be contained in molten steel, and when Als (acid-soluble aluminum) ≥ 0.020%, it also has the effect of refining grains

2023-08-18

Definition and classification of steel structure

The steel structure is mainly composed of steel plates, section steel, steel pipes, steel cables and other steel materials, which are connected by welds, bolts or rivets. Compared with other structural forms such as reinforced concrete structures, masonry and other masonry structures, steel structures not only have many advantages such as high strength, light weight, good plastic toughness and seismic performance, but also are suitable for mechanized processing, with a high degree of industrialization and a short construction period. short. Since materials such as cement and sand are rarely used, environmental pollution problems such as dust, construction waste and noise have been greatly reduced, which meets the requirements of sustainable development.

2023-08-18

Classification of steel varieties

Steel for railways: refers to the steel mainly used for production and construction by the railway sector. It mainly includes light rails, heavy rails, industrial rails, crane rails, conductive steel track switch rails and other rails, rail accessories such as fasteners, wheels, tires, axles and axle blanks, etc. Among them, the rails greater than 30 kg/m are heavy rails, and the rails not greater than 30 kg/m are light rails.

2023-08-18

Classification of chemical composition of steel

Non-alloy steel: Non-alloy steel is also called carbon steel. Except for a certain amount of silicon (generally <0.40%) and manganese (generally 0.80%) and other alloying elements added for deoxidation, the steel does not contain other alloying elements. of steel. According to the level of carbon content, it can be divided into low carbon steel ([C]≤0.25%), medium carbon steel (0.25%≤[C]0.60%) and high carbon steel ([C]>0.60%). The higher the carbon content, the higher the yield point and tensile strength, but the lower the plasticity and impact. In addition, according to the quality and use of steel, carbon steel is usually divided into three categories: ordinary carbon steel, high-quality carbon structural steel and tool carbon steel.

2023-08-18

Rapid increase in spot prices of stainless steel

On July 20th, the tax inclusive index price of Mysteel's high nickel iron arrived at the factory was 1066.4 yuan/nickel, which was unchanged from the 19th; The Indonesian nickel iron cabin bottom tax index price is 1060 yuan/nickel, which is unchanged from the 19th. Today's Headlines

2023-07-06

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