Square tubes for low and medium pressure boilers (gb-) are high-quality carbon structural steel hot-rolled and cold drawn (rolled) square tubes for superheated steam tubes, boiling water tubes for low and medium pressure boilers of various structures and superheated steam tubes, large smoke tubes, small smoke tubes and arch brick tubes for locomotive boilers. Square tubes for high-pressure boilers (gb- is a high-quality carbon steel, alloy steel and stainless heat-resistant steel square tube for the heating surface of water tube boilers with high pressure and above. High pressure square tube for chemical fertilizer equipment (GB - is a high-quality carbon structural steel and alloy steel square tube suitable for chemical equipment and pipelines with working temperature of - ~ ℃ and working pressure of ~ mA.There are many ways of ignition, such as arc electric spark, strong current, high-temperature furnace electron beam, laser, high-temperature radiation, microwave, chemical furnace,Now stainless steel is gradually replacing pure iron products in our life, and now the steel pipe is also gradually innovated. Now the qb square pipe is a typical representative. However, the above small series are not the focus. Today, the focus is on the analytical process of qb square tube sizing rolling.Welding seamless welding seamless is to make welded elbows. After grinding and pickling, sand blasting, there is no sign of welding on the surface. Even using advanced flaw detection equipment, it can not be seen that they are welded elbows.Mananara Avaratra,Normalized: A. pearlite steel; b. Bainitic steel; c. Martensitic steel; d. Austenitic steel.For improper stamping direction, simulation software shall be used in the initial stage of design to ensure that the direction of stamping parts is analyzed, and when the high-quality requirements of components require the re development of molds, the direction shall be adjusted to seamless square tubes. The square tube manufacturer introduces the forming, bending and bending of square tubes. As the name suggests the bending is compacted, and the inner and outer rollers are double with the inner and outer walls of tube billets during actual bending Compact towards the.Steel used & mdash& mdash; Such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.

The general delivery length of qb square pipe is mm-mm, or in the form of interface tubeSquare pipe is a square steel pipe cold drawn from seamless steel pipe, which is not a straight qb square pipe, and qb square pipe, also known as welded pipe, is a square pipe welded by steel plate or strip steel after crimping. Qb square tube has the advantages of simple production process, high production efficiency, many varieties and specifications and less equipment. The commonly used materials are QA and QC.B. low alloy structural steel C. ordinary structural steel and high-quality steel for specific purposes (including high-quality steel)Test method,Brinell hardness (HB), Rockwell hardness (HRC) and Vickers hardness (HV) are commonly used.Derusting grade for the construction process of epoxy, ethylene, phenolic and other coatings commonly used for square pipes, the surface of square pipes is generally required to reach near white grade (SA). Practice has proved that almost all oxide scale, rust and other dirt can be removed by using this derusting grade, and the depth of anchor grain can reach ~ & mu; m, which fully meets the requirements of adhesion between layer and square pipe The shot derusting process can meet the technical conditions of near white level (SA) with low operation cost and stable and reliable quality.C. electric furnace steel: (a) electric arc furnace steel; (b) Electroslag furnace steel; (c) Induction furnace steel; (d) Vacuum consumable furnace steel; (e) Electron beam furnace steel.

Purpose of square tube the purpose of square tube includes construction, machinery, steel construction and other projects, shipbuilding solar power generation support, steel structure engineering, electric products ( pieces)analysis,The load of impact toughness acting on the parts at a great speed is called impact load. It is specialized in products and renewable resources. Its business includes: square tube, square tube seamless square tube, galvanized square tube and galvanized tube. The ability of metal under impact load is called impact toughness.Performance index analysis fatigue of square tube the strength,San CarlosHow much is the price of galvanized steel pipe per meter, many machine parts work under cyclic load, under which fatigue will occur.Mechanical engineering, agricultural and chemical machinery,San CarlosGalvanized square pipe as beam, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, housing construction, pressure vessels, oil storage tanks,San CarlosGalvanized square pipe machinery, bridges, power station equipment, heavy transportation machinery and other welded structural parts with high load, etc. Process classification: according to the production process, square tubes are divided into hot-rolled seamless square tubes, cold drawn seamless square tubes, seamless square tubes and qb square tubes.San Carlos,Square tube for automobile half shaft sleeve (gb-) is a high-quality carbon structural steel and alloy structural steel hot-rolled square tube for automobile half shaft sleeve and drive axle housing.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.Large diameter qb square tube production standard classification square tube is divided according to production standard: national standard square tube, Japanese standard square tube, British standard square tube, American standard square tube, European standard square tube and non-standard square tube.