995795 Large Diameter Gas Lens Collet Body for TIG Torch

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Steel Structure Material

Steel structure is a structure made of steel material, and it is one of the main types of building structures. The structure is mainly composed of steel beams and steel plates, such as steel beams, steel columns, steel trusses and so on. Each component or component is usually connected with welds, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise and other fields. There will be various forms of action in the process of using (load, uneven settlement of foundation, temperature etc.), so the steel has good mechanical properties (strength, plasticity, toughness and processability) (hot and cold processing and welding performance), in order to ensure the safe and reliable structure. Many types of steel, steel structure meet the requirements are only a few, such as carbon steel, low alloy steel Q235, l6Mn, for 20 manganese vanadium steel high strength bolts (20MnV), steel structure performance index must have 1, strength

The strength index of steel by elastic stress e, yielding stress y, and tensile stress u, the design of the steel yield strength as the foundation, the high yield strength can reduce the weight of structure, save steel, reduce cost. The ultimate tensile strength is the maximum stress of U steel can withstand before failure, the structure due to plastic deformation and loss of performance, but the structure and deformation of structure does not collapse, meet the requirements of earthquake resistance. The size of the sigma u/ sigma y can be considered as a parameter for the strength reserve of steel.
2, plasticity
The plasticity of steel generally refers to the fact that the stress exceeds the yield point and has a remarkable plastic deformation without breaking. The main measure of steel plastic deformation ability is elongation and contraction rate of psi.
3, cold bending property
The cold bending property of steel is to measure the resistance of steel to crack when it is bent at normal temperature and produces plastic deformation. The cold bending property of steel is tested by cold bending test to ensure the bending deformation of steel under specified bending degree.
4, impact toughness
The impact toughness of steel material are subjected to impact load, a kind of ability in the fracture process of mechanical energy absorption, is a measure of the impact resistance of steel load effects may be due to stress concentration, temperature, and mechanical properties lead to a brittle fracture. Generally, the impact toughness index of steel is obtained by impact test of standard specimen.
5. Welding performance
The weldability of steel is a welding joint with good performance under certain welding conditions. Welding performance can be divided into two types: welding performance and welding performance. Welding performance in the process of welding refers to the welding process and the welding seam near the metal does not produce thermal crack or cooling, does not produce cooling shrinkage crack sensitivity. Welding performance is good, refers to the welding process under certain conditions, weld metal and nearby parent material does not produce cracks. The welding performance on service performance refers to the impact toughness at the weld and the ductility in the heat affected zone. The mechanical properties of the steel in the weld and the heat affected zone are not less than the mechanical properties of the base metal. China adopts the welding property test method of welding process, and also adopts the welding property test method of usability and property.
6, durability
There are many factors that affect the durability of steel. First of all, the poor corrosion resistance of steel, and must take protective measures to prevent corrosion of steel corrosion. Protective measures are: to maintain regular steel paint, galvanized steel, with acid, alkali, salt and other corrosive medium conditions, with special protective measures, such as offshore platform structure using ""anode protection"" measures to prevent the corrosion of the jacket, the jacket is fixed on the zinc ingots, seawater electrolytes will automatically first corrosion of zinc ingots, in order to protect the function of steel jacket. Second, because of the high temperature and long-term load, the damage strength of steel is lower than the short-term strength, so the long-term strength of steel must be measured. The steel will automatically harden and become brittle over time, i.e. ""aging"". For the steel under low temperature load, the impact toughness should be tested, and the environmental protection material can be recycled 100%, so as to achieve the goal of ""green"" and ""pollution-free"".
energy conservation
All use energy-efficient wall, insulation, heat insulation, sound insulation effect is good, can reach 50% of the energy efficiency standards."

Raw Material Supplying

Raw Material Supplying,Metal Material Processing,Roofing Steel Structure Material,Exterior Wall Steel Structure Material

Dongguan Honglong Steel Structure Co,. Ltd. ,