Carbon Steel Pipe Square Rectangular Pipe

Part 1 Product Description

Carbon steel pipe is made of steel ingot or solid round steel warp and weft, and then hot rolled, cold rolled or cold rolled. Carbon steel pipes are divided into two types: hot-rolled and cold-rolled (drawn) steel pipes.

Part 2 Classification

1.Hot-rolled carbon steel pipes

Hot-rolled carbon steel pipes are divided into general steel pipes, low-pressure and medium-pressure boiler steel pipes, high-pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.

2.Cold-rolled (drawn) carbon steel pipes

Cold-rolled (drawn) carbon steel pipes include general steel pipes, low-pressure boiler steel pipes, high-pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, and non-stainless steel thin-walled steel pipes. Wall steel pipe, special-shaped steel pipe. The outer diameter of hot-rolled pipe is generally greater than 32mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-rolled short-walled steel pipe can reach 6mm, and the wall thickness can reach 0.25mm. Higher dimensional accuracy than hot rolling.

3.Welded carbon steel pipe

It is made of high-quality carbon steel such as #10, #20, #30, #35, #45, 16Mn, 5MnV and other low-alloy structural steels or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steels that are hot-rolled or cold-rolled. #10, #20 and other low-carbon steel seamless pipes are mainly used for pipelines. Seamless pipes made of medium carbon steel such as #45 and 40Cr must be used to manufacture mechanical parts, such as stressed parts of automobiles and tractors. Carbon steel pipe strength and flattening tests are generally used. Hot-rolled steel pipe dies in a hot-rolled state or a heat-treated state; cold-rolled dies in a heat-treated state.

Part 3 Usage

Carbon steel pipes commonly used in production are generally divided into three categories: high, medium and low carbon. High-carbon steel pipes have the highest carbon content, generally greater than 0.6%, but we know that the higher the carbon content, the greater the brittleness, so high-carbon steel pipes are generally not used in industrial production. Medium carbon steel pipe is generally 0.25%~0.6%. This type of steel pipe has moderate hardness and is widely used. Mild steel pipes contain less than 0.25% carbon and are therefore more common in industrial applications.

Part 4 Square Steel Pipe

steel pipes with equal side lengths and unequal side lengths. It is made of strip steel through process treatment. Generally, the strip steel is unpacked, flattened, crimped, and welded to form a round tube, and then rolled into a square tube from the round tube, and then cut to the required length.

1.Production process

Hot-rolled seamless tubes, cold-drawn seamless tubes, extruded seamless tubes, and welded tubes.Square tubes are divided by material: plain carbon steel square tubes, low alloy square tubes.

2.Production standards

National standard square tubes, Japanese standard square tubes, imperial square tubes, American standard square tubes, European standard square tubes, non-standard square tubes.

3.Square tubes are divided according to surface treatment:

Hot-dip galvanized square tubes, electro-galvanized square tubes, oil-coated square tubes, pickling square tubes.

4. Square tubes are classified by use

Square tubes for decoration, square tubes for machine tools, square tubes for machinery industry, square tubes for chemical industry, square tubes for steel structures, square tubes for shipbuilding, square tubes for automobiles, square tubes for steel beams and columns , Special purpose square tube.