OEM/ODM China Copper Pipe - Q345B Square Tube – JINBAICHENG

Product Introduction

Q345B square tube, 16Mn square tube, Q345B square tube, square tube, rectangular tube, seamless square tube, stainless steel square tube, square rectangular tube, q345b square tube, large diameter thick-walled square tube, Q345C square tube, stainless steel square Rectangular steel pipes, seamless square rectangular steel pipes and other square pipe products.

Q345B square tube is produced according to the national standard GBT 6728-2002 cold-formed hollow section steel for the size, shape, weight and allowable deviation of the structure. It is made of Q345B strip steel after processing and rolling. The Q345B square tube is made of Q345B material (low alloy), which is very different from the ordinary square tube in the raw material material (Q195, Q215, Q235). Generally, the Q345B strip steel (low alloy) is unpacked. , Flattened, crimped, welded to form a round tube, and then rolled into a square tube from the round tube and then cut into the required length. The usual length is 6 meters, and the large amount of 12 meters can be processed according to customer requirements. Generally, the small size is 50 pieces per pack, and the large size is 4 pieces each and the weight is controlled at about 3 tons. Q345B square tubes are mostly 80MM*80MM-500MM*500MM in large specifications in stock, and the thickness is 3MM-16MM.

Product Display

the difference

Q345B square tube seamless and welded
Q345B seamless square tube is formed by extruding Q345B seamless round tube.

Product Features

Q345B square tube plasticity
Plasticity refers to the ability of metal materials to produce plastic deformation (permanent deformation) without being damaged under load.

Q345B square tube hardness
Hardness is a measure of the hardness of metal materials. The most commonly used method for measuring hardness in production is the indentation hardness method, which uses an indenter of a certain geometric shape to press into the surface of the metal material to be tested under a certain load, and the hardness value is determined according to the degree of indentation.
Commonly used methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV).

Product Usage

Q345B square tube is a hollow square section light thin-walled steel tube, also known as steel refrigerated bending section. It is a section steel with a square cross-section shape and size made of Q345B hot-rolled or cold-rolled strip or coil as the base material, which is formed by cold bending and then welded by high-frequency welding. In addition to the thickening of the wall thickness of the hot-rolled extra-thick wall square tube, the corner size and edge flatness have reached or even exceeded the level of the resistance welded cold-formed square tube.

Q345B square tube use
Q345B square pipes are generally used in construction, machinery manufacturing, steel construction projects, shipbuilding, solar power support, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc.

Theoretical weight formula

Q345B square pipe branch weight calculation formula: 4 sides added * thickness * 0.00785 * length

Q345B rectangular pipe support weight calculation formula: (side length + side length) * 2 * 0.00785 * wall thickness * length