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Flat steel

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Flat steel, also commonly referred to as flat bar or steel flat bar, is a kind of long steel product characterized by a rectangular cross-section with slightly blunt edges. It plays an irreplaceable role in multiple industrial and civil fields due to its excellent performance and flexible applicability. The detailed introduction is as follows:

  1. Key Specifications

    • Common dimensions: There are relatively flexible specifications for flat steel. Generally, its width ranges from 10mm to 870mm, and the thickness is between 1.5mm and 60mm. The common lengths are 6m, 9m, and 12m, and customized lengths can also be provided according to customer needs.

    • Common materials and grades: It can be made of carbon steel, alloy steel, stainless steel and other materials. Common steel grades include ordinary carbon structural steels like Q195 and Q235, high-quality carbon structural steels such as 45 steel, low-alloy high-strength steels like Q345, as well as stainless steels including 304 and 316. These different materials determine its performance such as strength and corrosion resistance.


  2. Main Classification

    • By production process: Hot-rolled flat steel is produced through high-temperature rolling. It has iron oxide scale on the surface and large dimensional tolerance, which is suitable for structural projects such as buildings and bridges. Cold-rolled flat steel is processed at room temperature, featuring a smooth surface and high dimensional accuracy. It is often applied to machinery manufacturing, home appliance casings and other fields that have high requirements for precision.

    • By shape: The most widely used one is rectangular cross-section flat steel with right-angle edges, which is mainly used for structural parts and frames. Round-edge flat steel has rounded edges and is often used in scenarios that require high aesthetics and safety.


  3. Core Advantages

    • It has outstanding durability and load-bearing capacity, which can ensure the stability of structures and mechanical parts. Specific materials like stainless steel flat steel also have excellent corrosion and rust resistance.

    • It is cost-effective and easy to process. It can be welded, cut and drilled conveniently, so as to adapt to various assembly needs in different projects.

    • The diverse specifications and material types can meet the customized requirements of different fields, from ordinary construction to high-precision machinery manufacturing.


  4. Typical Applications

    • Construction field: It is used as structural components such as building frames and escalators. It can also be made into galvanized grounding wires and staircase protective rings, and is even widely applied in mining tunnel projects because of its good strength and flexibility.

    • Manufacturing field: It is a key material for manufacturing mechanical parts, machine tool guides and equipment bases. It is also used in container manufacturing, shipbuilding and home appliance shell production.

    • Other fields: It can be processed into hoop iron, fences, door decorations and other products, and the 40×4 galvanized flat steel is also an ideal material for building lightning protection and grounding systems due to its fast lightning conduction and dissipation capacity.