Viewing color: the color of the cold galvanized square tube is yellowish green, mainly in curtain wall, solar power generation support, construction, machinery and steel structure engineering, especially in curtain wall,Performance index analysis of square tube - strength refers to the performance of metal materials under static load. Since the action modes of load include tension, compression bending and shear, the strength is also divided into tensile strength, compressive strength, flexural strength and shear strength. There is often a certain between various strengths. Generally, tensile strength is used as the basic strength indicator.Functional index analysis of qb square tube - commonly used are Brinell angle (HB), Rockwell angle (HRC) and Vickers angle (HV) of qb square tube. Angle is a gauge needle to weigh the soft and hard level of metal data. The angle method is rarely used to determine the internal angle in the current life. It uses the metal data surface tested under the fixed load of the indenter with a certain number and shape to determine its angle value according to the level of the object.Mulheim an der Ruhr,Vientiane CityHot dip galvanized steel pipe,The surface of fake and inferior square tubes is easy to produce scabs. There are two reasons: the material of fake and inferior square tubes is uneven and there are many impurities. The guide equipment of fake and shoddy material manufacturers is simple and easy to stick to steel. These impurities are easy to scar after biting the roll.Hot dip galvanized square tube is a kind of square tube which is welded after using steel plate or steel strip to curl and form,Vientiane City40 square pipe galvanized,Vientiane CityGalvanized spiral welded pipe manufacturer, and on the basis of this square tube, the square tube is placed in the hot dip galvanized pool and formed through a series of chemical reactions; The production process of hot-dip galvanized square pipe is relatively simple, but the production efficiency is very high and there are many specifications and varieties, but this kind of square pipe needs little equipment and capital, which is more suitable for the production of small galvanized square pipe manufacturers.The second is to clean the surface of the opposite pipe. When cleaning the opposite pipe, the surface should be cleaned with solvent or emulsion. Square pipes of various specifications, square rectangular pipes, seamless square pipes, galvanized square pipes, galvanized pipes are supplied in time and cost-effective. They have become the preferred brand of many wire products. Welcome to buy! It is used to remove oil and dust. It is only suitable for removing grease and dust on the surface of square pipe, which can not remove rust and oxide scale. Therefore, it can only be used as an auxiliary means in production.

Ferroalloy is an alloy composed of iron and silicon, manganese, chromium, titanium and other elements. Ferroalloy is the raw material for steelmaking. It is used as deoxidizer and alloy element additive for steel in square tube steelmaking.Avoid contact with pollutants such as oil and copper when storing square tubes.It should be noted that the position of the disc from the calibration line can be adjusted according to the reinforcement diameter, and R and R can be equal or different.build,So flat, and the size and thickness are not standardized, it can reflect that this square tube is a poor product& rdquo;Classification of square tube steel is iron carbon alloy with carbon content of square tube between .% - %. In order to ensure its toughness and plasticity, the carbon content generally does not exceed %. In addition to iron and carbon, the main elements of steel also include silicon, manganese, sulfur, phosphorus, etc. There are various classifications of steel and square tubes, S & le; .%)Compared with other welding, the material only needs to be heated below the melting point

Cleaning solvent and emulsion can clean the surface of square tube to remove oil mainly because of the exothermic reaction, grease, dust, agent and similar organic matter, but it can not remove rust, scale, welding, etc. on the surface of square tube so it is only used as an auxiliary means in production.Home page recommendation, Standard No.: gbt-. Representative materials Cr cr crni CrNi crninbPlasticity QB square plasticity refers to the ability of metal materials to produce plastic deformation (deformation) without deformation under load.Stainless steel qb square pipe for mechanical structure, etc. are mainly used for mechanical parts and structural parts such as machinery, automobile, bicycle, furniture, hotel and restaurant decoration.So flat, and the size and thickness are not standardized, it can reflect that this square tube is a poor product& rdquo;Vientiane City,Comprehensive classification ordinary steel A. carbon structural steel: (a) Q (b) Q (b); (c) Q( C)； (d) Q( B)； (e) Q.Impact toughness the load acting on the machine part at a great speed by QB is called impact load, and the ability of metal under impact load is called impact toughness.Brinell hardness (HB), Rockwell hardness (HRC) and Vickers hardness (HV) are commonly used.