Contact Platform Support
Help CenterFlat Steel & Flat Square Tube,Q235B / Q355B / S235JR / S355JR / A36 / SS400
Related Products
-
Steel Wire & Galvanized Steel Wire，Q195、Q235、S235JR、45#、55#、60#、65#、70#、82BNegotiableMOQ: 5 Metric Tons -
Steel Wire & Galvanized Steel Wire，Q195、Q235、S235JR、45#、55#、60#、65#、70#、82BNegotiableMOQ: 5 Metric Tons
-
Steel Wire & Galvanized Steel Wire，Q195、Q235、S235JR、45#、55#、60#、65#、70#、82BNegotiableMOQ: 5 Metric Tons
-
Steel Rebar & Deformed Steel Bar，HRB400、HRB400E、HRB500、HRB500ENegotiableMOQ: 5 Metric Tons
-
Steel Rebar & Deformed Steel Bar，HRB400、HRB400E、HRB500、HRB500ENegotiableMOQ: 5 Metric Tons
1. Product Overview
Flat steel, also known as flat bar, is a long strip-shaped steel product with a rectangular cross-section, featuring a smooth surface, uniform thickness, and stable mechanical properties. It is a versatile and economical metal profile widely used in industrial production, construction engineering, machinery manufacturing, and other fields. With its simple structure, easy processing, and reliable performance, flat steel serves as a key material for structural support, connection, reinforcement, and decorative applications, providing practical and cost-effective solutions for various projects at home and abroad.
Different from other profiles such as angle steel and H-beam, flat steel has a flat and wide cross-section, which enables it to bear uniform pressure, ensure stable connection, and be easily cut, bent, and welded according to actual needs. It is available in various specifications, surface treatments, and materials to adapt to different working environments and engineering requirements.
2. Product Classification
2.1 By Cross-Section and Use
General Flat Steel: The cross-section is a regular rectangle, with a width ranging from 10mm to 200mm and a thickness from 3mm to 50mm. It is widely used in general structural components, such as brackets, reinforcements, connecting plates, and base plates, and is the most commonly used type of flat steel in engineering.
Strip Steel: A type of thin and narrow flat steel, with a width usually less than 100mm and a thickness of 0.2mm to 3mm. It is mainly used in small-scale structural parts, decorative parts, hardware products, and as raw materials for further processing (such as stamping and bending).
Special-Shaped Flat Steel: Customized according to customer requirements, with special cross-sectional shapes (such as rounded edges, beveled edges, or unequal thickness) to meet specific structural and installation needs, commonly used in special machinery, equipment, and decorative projects.
2.2 By Surface Treatment
Hot-Rolled Black Flat Steel: Produced by high-temperature rolling process, retaining the original black oxide surface formed during rolling. It has the advantages of high production efficiency, stable performance, and low cost, suitable for indoor structures, components that require subsequent anti-corrosion treatment, or non-corrosive working environments.
Hot-Dipped Galvanized Flat Steel: After hot-dip galvanizing treatment, a dense and uniform zinc coating is formed on the surface, which has excellent rust resistance, corrosion resistance, and weather resistance. It is widely used in outdoor facilities, coastal projects, high-humidity environments, and other occasions that require long-term anti-corrosion protection.
Painted Flat Steel: Coated with anti-rust paint or decorative paint on the surface, which not only plays a role in anti-corrosion but also can be customized in color according to needs. It is suitable for decorative projects, indoor and outdoor frames, and components with aesthetic requirements.
Sandblasted Flat Steel: The surface is treated by sandblasting to remove oxide scale, rust, and impurities, making the surface smooth and clean. It is usually used as a pre-treatment for painting or galvanizing, or for occasions that require high surface flatness and cleanliness.
2.3 By Production Process
Hot-Rolled Flat Steel: The main production method, using steel billets for high-temperature rolling, with uniform thickness, stable mechanical properties, and standard specifications. It is suitable for large-scale production and most conventional engineering applications.
Cold-Rolled Flat Steel: Produced by cold rolling process at room temperature, with higher precision, smoother surface, and better dimensional accuracy than hot-rolled flat steel. It is suitable for occasions that require high surface quality and dimensional precision, such as precision machinery, decorative parts, and electronic equipment brackets.
Welded Flat Steel: Welded by steel plates of appropriate thickness and width, which can be customized into large-size or special-specification flat steel that is difficult to produce by rolling. It is suitable for large-scale engineering, special structures, and non-standard component requirements.
3. Standards & Materials
Our flat steel products strictly comply with international and national quality standards, ensuring stable quality, reliable performance, and strong compatibility. We can provide products that meet various standards according to customer needs:
Chinese Standard (GB): GB/T 700 (Carbon Structural Steel), GB/T 1591 (High-Strength Low-Alloy Structural Steel), GB/T 706 (Hot-Rolled Section Steel), GB/T 13793 (Cold-Rolled Strip Steel)
European Standard (EN): EN 10025 (Structural Steel), EN 10130 (Cold-Rolled Steel Sheets and Strips)
American Standard (ASTM): ASTM A36 (Carbon Structural Steel), ASTM A1011 (Hot-Rolled Carbon Steel Sheets and Strips), ASTM A1008 (Cold-Rolled Carbon Steel Sheets and Strips)
Other Standards: JIS (Japanese Industrial Standard), DIN (German Industrial Standard), etc.
Commonly used materials for flat steel include:
Carbon Structural Steel: Q235A, Q235B, Q235C (GB); A36, A283 Gr.C (ASTM); S235JR (EN)
High-Strength Low-Alloy Steel: Q355B, Q355C, Q355D (GB); A572 Gr.50 (ASTM); S355JR (EN)
Other Materials: Q195, Q215 (GB); A1018 (ASTM); etc.
All materials have excellent weldability, formability, and mechanical properties, which can meet the strength, toughness, and corrosion resistance requirements of different engineering scenarios.
4. Product Specifications
We provide a complete range of flat steel specifications, and can also customize according to customer requirements to meet the needs of various projects:
Width Range: 10mm – 200mm (general flat steel); 5mm – 100mm (strip steel); customized width available
Thickness Range: 3mm – 50mm (hot-rolled flat steel); 0.2mm – 3mm (strip steel); 1mm – 10mm (cold-rolled flat steel); customized thickness available
Length Range: Standard lengths: 6m, 9m, 12m; customized length cutting available (minimum length 1m, maximum length 18m)
Deep Processing Services: According to customer needs, we provide punching, drilling, bending, shearing, welding, galvanizing, painting, and other deep processing services to ensure that the products can be directly used in engineering installation.
Specification representation: Width × Thickness (e.g., 50×5mm, 100×8mm, 150×10mm), and length can be specified separately.
5. Product Advantages
Excellent Mechanical Performance: The rectangular cross-section design ensures uniform stress distribution, high bending resistance, compression resistance, and shear resistance, which can effectively bear various loads and ensure structural stability. The material has stable toughness and strength, and is not easy to deform or break during use.
Easy Processing & Installation: It has good weldability, bolt connectivity, and machinability, and can be easily cut, drilled, bent, and assembled with common tools. The flat surface is convenient for connection with other components, which greatly improves construction efficiency and reduces labor costs.
Wide Application Versatility: It can be used in various industrial and construction scenarios, and can be used as structural components, supports, reinforcements, connecting plates, decorative parts, etc. It is compatible with other profiles (angle steel, H-beam, channel steel) and can form a complete structural system.
High Cost-Efficiency: The production process is mature, the material utilization rate is high, and mass production can reduce the comprehensive cost. Compared with other special profiles, flat steel has a lower price while meeting the basic performance requirements, which is very suitable for large-scale engineering projects.
Strong Durability & Corrosion Resistance: Hot-dipped galvanized and painted flat steel have excellent anti-rust and anti-corrosion performance, which can resist the erosion of moisture, rainwater, and harmful gases, and extend the service life of the products in harsh environments. The surface of hot-rolled black flat steel can also be further treated to improve corrosion resistance.
Stable Quality & Reliable Supply: Adopting advanced rolling and processing equipment, with strict quality control throughout the production process, ensuring that the product dimensions, thickness, surface quality, and mechanical properties meet the standard requirements. We have a stable supply chain and can ensure timely delivery according to customer orders.
Customizable & Flexible: We can provide customized services according to the specific requirements of customers, including specifications, materials, surface treatment, and deep processing, to meet the personalized needs of different projects.
6. Main Application Fields
Building & Steel Structures: Used as reinforcements for concrete structures, connecting plates for steel frames, brackets for curtain walls, base plates for doors and windows, roof supports, and floor reinforcements. It is widely used in factories, warehouses, high-rise buildings, residential buildings, and other construction projects.
Mechanical & Equipment Manufacturing: Used as frames, bases, supports, and connecting components for various machinery and equipment, such as agricultural machinery, engineering machinery, textile machinery, and electrical equipment. It can also be used as raw materials for stamping and forging parts.
Power & Communication Facilities: Used as supports for power transmission lines, brackets for communication towers, base plates for substations, and reinforcements for electrical equipment. It is suitable for outdoor power and communication projects that require corrosion resistance and stability.
Bridge & Infrastructure: Used as components for bridges, trestles, pipe supports, road guardrails, and drainage facilities. It can bear large loads and adapt to outdoor harsh environments, ensuring the safety and stability of infrastructure projects.
Decorative & Hardware Engineering: Used as decorative strips, handrails, shelves, billboard brackets, and hardware accessories. The surface can be treated with galvanizing or painting to improve aesthetics and corrosion resistance, suitable for indoor and outdoor decorative projects.
Marine & Coastal Engineering: Hot-dipped galvanized flat steel is widely used in marine structures, offshore platforms, coastal guardrails, and port facilities, thanks to its excellent corrosion resistance to seawater and humid environments.
Other Fields: Used in automobile manufacturing (chassis components, brackets), shipbuilding (deck components, hull reinforcements), and mining engineering (support brackets, protective plates).
7. Packaging, Quality & Delivery
7.1 Packaging
To ensure the safety of products during transportation and storage, we adopt scientific and firm packaging methods:
Bundling: Products are bundled tightly with high-strength steel strips, with wooden pads at the bottom to prevent deformation and scratches during transportation.
Waterproof Treatment: For galvanized or painted products, waterproof plastic film is wrapped to prevent moisture and corrosion during sea transportation or storage in humid environments.
Labeling: Each bundle is labeled with product information, including material, specification, length, quantity, standard, and batch number, for easy identification and inspection.
Packaging Customization: According to customer requirements, we can provide customized packaging methods suitable for sea transportation, land transportation, or railway transportation.
7.2 Quality Assurance
Strict Quality Control: We implement strict quality inspection from raw material procurement, production processing to finished product delivery, including dimensional inspection, surface quality inspection, mechanical performance testing, and corrosion resistance testing.
Quality Certificates: We provide original Mill Test Certificate (MTC), material inspection reports, and export commodity inspection documents to ensure that the products meet the quality requirements of customers and relevant standards.
After-Sales Service: If there are quality problems with the products due to our reasons, we will provide timely after-sales solutions, including replacement, repair, or refund, to ensure customer satisfaction.
7.3 Delivery
Delivery Time: 5–7 days after receiving the order (for standard specifications in stock); for customized products, the delivery time will be determined according to the production cycle and notified to the customer in advance.
Delivery Methods: We cooperate with professional logistics companies to provide sea transportation, land transportation, and railway transportation services, and can deliver the products to the designated port or address of the customer.
Export Services: We provide professional export services, including customs declaration, inspection, and documentation, to ensure that the products can be smoothly exported to various countries and regions around the world.
Send Inquiry to This Supplier
You May Also Like
-
Steel Rebar & Deformed Steel Bar，HRB400、HRB400E、HRB500、HRB500ENegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip & High Quality Steel Coil，Q195、Q235BNegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip & High Quality Steel Coil，Q195、Q235BNegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip & High Quality Steel Coil，Q195、Q235BNegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & Hot-dip Galvanized Seamless Steel Pipe，GB/T 3091、ASTM A53、EN 10255NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip＆Cold Rolled Coil，SPCC, SPCD, SPCE, DC01, DC02, DC03, DC04, Q195, Q235B, ST12, ST13, ST14NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip＆Cold Rolled Coil，SPCC, SPCD, SPCE, DC01, DC02, DC03, DC04, Q195, Q235B, ST12, ST13, ST14NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip＆Cold Rolled Coil，SPCC, SPCD, SPCE, DC01, DC02, DC03, DC04, Q195, Q235B, ST12, ST13, ST14NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip＆Hot Rolled Coil ，SPHC, SPHD, SPHE, SS400, Q235B, Q355B, S235JR, S355JR, A36, ST37, ST52NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip＆Hot Rolled Coil ，SPHC, SPHD, SPHE, SS400, Q235B, Q355B, S235JR, S355JR, A36, ST37, ST52NegotiableMOQ: 5 Metric Tons
