Cold drawn national steel, square steel, hexagonal steel (GB/T905-1994)

Cold-drawn steel, square steel and hexagonal steel (GB/T905-1994)

Cold-drawn steel, also known as cold-drawn steel rod and cold-drawn steel wire, is a type of steel product obtained by cold drawing or cold rolling. Its characteristics are uniform hardenability and higher surface roughness than hot-rolled steel and finished steel. Due to its hot rolled steel and finished steel, cold drawn steel and related products are widely used in construction, metallurgy, shipbuilding, electric power, automotive, agricultural, textile and other industries.

Square steel refers to a cross-sectional profile of a steel bar, which is close to a square shape. According to the production process, it can be divided into cold-drawn steel, hot-rolled square steel, extruded square steel and machine square steel. Square steel is widely used in mineral exploration, large bridges, ships, high-rise buildings, fences, coal mines, machinery manufacturing, construction infrastructure and other parts, with a wide range of applications.

Hexagonal steel is also known as hexagonal steel bars and hexagonal steel wires. They are all obtained by cold-drawing or cold-rolling stainless and carbon steel. The standard hexagonal steel is mainly GB/T998-1988, GB/T905-1994 and GB/T3308-1999. Hexagonal steel is widely used in petrochemical, automobile and aerospace, because of its good strength, constant size and good rigidity, etc.

Cold drawn steel, square steel and hexagonal steel are high-quality steel products. Their uniform hardenability, higher surface roughness and good physical properties ensure the production quality and product specifications of the products. In addition, they are also widely used in many different industries due to their suitable cross-sectional profiles. As such, they have become an important part of the steel industry.

Cold rolled steel, also known as cold drawn steel, is a widely used steel material. It is a cold drawing process during processed in integrated mills or combined mills. It is usually performed by taking a hot rolled steel bar, pickling and cold drawing it to an appropriate size. Compared with hot rolled steel, cold rolled steel has higher hardness, durability, mechanical properties and greater accuracy.

Cold drawn steel (GB/T 905-1994) is a cold drawn steel which includes flat steel, hexagonal steel and square steel. According to different sizes, it is divided into five main categories: light, medium, hard, extra hard and extra extra hard. It can be used to make all kinds of precision components and parts, such as nuts, bolts, rivets, pins and other fasteners, shafts, sleeves, spacers, middle frames and other structural members.

Compared with hot rolled steel bars, cold rolled steel bars have superior mechanical properties, such as higher tensile strength, yield strength, elongation and hardness. Its performance is more stable and reliable. Its wear resistance and fatigue strength are better than those of hot rolled bars, so cold rolled bars are often applied in areas that require high wear resistance and fatigue strength.

Therefore, cold rolled steel is particularly suitable for applications where dimensions and shape tolerances are particularly strict, surface quality and appearance are highly valued, and higher wear resistance and fatigue strength are required. Companies such as automobiles, tractors and textiles all make great use of cold rolled steel.