Main Performance of Seamless Square Tube

1. Plasticity
Plasticity refers to the ability of a metal material to undergo plastic deformation (permanent deformation) under load without failure.
2. Hardness
Hardness is a pointer that measures the softness and hardness of a metal material. The most commonly used method for measuring hardness in this production is the indentation hardness method, which uses a geometrically shaped indenter to press into the surface of the tested metal material under a certain load, and determines its hardness value based on the degree of indentation.
The commonly used methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC), and Vickers hardness (HV).
3. Fatigue
Strength, plasticity, and hardness are all indicators of the mechanical properties of metals under static load. In fact, many machine parts operate under cyclic loads, which can lead to fatigue. Special shaped steel pipes with other cross-sectional shapes are also required.
Welded steel pipes for low-pressure fluid transportation (GB/T3092-1993), also known as general welded pipes or black pipes. It is a welded steel pipe used for conveying generally lower pressure fluids such as water, gas, air, oil, and heating steam, and other purposes. The wall thickness of steel pipes can be divided into ordinary steel pipes and thickened steel pipes; The forms of connecting pipe ends are divided into non threaded steel pipes (plain pipes) and threaded steel pipes. The specification of steel pipes is represented by the nominal diameter (mm), which is an approximate value of the inner diameter. Traditionally, inches are commonly used, such as 11/2. Welded steel pipes for low-pressure fluid transportation are not only directly used for fluid transportation, but also extensively used as raw pipes for galvanized welded steel pipes for low-pressure fluid transportation.
Galvanized welded steel pipes for low-pressure fluid transportation (GB/T3091-1993) are also known as galvanized welded steel pipes, commonly known as white pipes. It is a hot-dip galvanized welded (furnace welded or electric welded) steel pipe used for conveying water, gas, air oil, heating steam, warm water, and other generally lower pressure fluids or other purposes. The wall thickness of steel pipes can be divided into ordinary galvanized steel pipes and thickened galvanized steel pipes; The forms of connecting pipe ends are divided into unthreaded galvanized steel pipes and threaded galvanized steel pipes.
Ordinary carbon steel wire sleeves (GB3640-88) are steel pipes used to protect wires in electrical installation projects such as industrial and civil buildings, installation machinery and equipment.
The straight seam electric welded steel pipe (YB242-63) is a steel pipe with a weld seam parallel to the longitudinal direction of the steel pipe. Usually divided into metric welded steel pipes, welded thin-walled pipes, transformer cooling oil pipes, and so on.
The spiral seam submerged arc welded steel pipe (SY5036-83) for the transportation of pressurized fluids is a spiral seam steel pipe used for the transportation of pressurized fluids, which is made of hot-rolled steel strip coils as pipe billets, often formed by warm spiral welding, and welded by the double-sided submerged arc welding method. The steel pipe has strong pressure bearing capacity and good welding performance. After various strict scientific inspections and tests, it is safe and reliable to use. The steel pipe has a large diameter, high conveying efficiency, and can save investment in pipeline laying. Mainly used for pipelines transporting oil and natural gas.