Compared with some other structural materials, square tubes have the advantage of light weight, which is easy to transport and install. Easy to process: It has good processing performance, convenient for cutting, welding and other operations, and can meet various complex design requirements.
Black square tube, also known as black square tube, is a common building material, usually made of hot-rolled or cold-drawn steel strip. Its surface is usually treated with rust prevention to prevent oxidation and corrosion.
A500 Grade B, C, and D square tubes all adopt the A500 standard issued by the American Standards Association (ASTM), and meet internationally recognized standards in terms of quality and performance. They are cold-formed welded and seamless carbon steel square tubes that can be used for welded, riveted or bolted structures of bridges and buildings, as well as general structural purposes. In terms of production specifications, the circumference of welded and seamless sizes is 64 inches (1626mm) or less, and the specified wall thickness is 0.625 inches (15.88mm) or less. Grade D requires heat treatment, and the steel density is about 7850 kg/m³ (0.284 pounds/cubic inch).
S355J2 is a high-quality building material with a wide range of applications and stable performance. In the field of construction, S355J2 has become the preferred material for large structural parts due to its high strength and good toughness. Whether it is the load-bearing structure of a high-rise building or the support system of an underground pipeline, S355J2 can ensure the stability and safety of the building. In addition, it also has good weldability and processability, allowing architects and engineers to design and build various complex building structures more flexibly.
Q355B is a low-alloy high-strength structural steel with a tensile strength of 470-630MPa, a yield strength of 280-420MPa, and an elongation of 21-29%. This makes it have better strength and stability under heavy loads and complex working conditions, and can show good plastic deformation ability when subjected to external forces, absorb more energy, and protect the structure from damage.
