Tianjin Lefin Industrial Co., Ltd is one of the most experienced manufacturers and suppliers of angle steel in China. Please feel free to buy high quality angle steel from our factory. Good service and reasonable price are available.
What Is Angle Steel?
Angle steel, also known as an L-beam or angle bar, is a piece of structural steel characterized by its L-shaped cross-section. This profile design provides specific strengths in two different directions, making it ideal for various construction applications. Typically made from galvanized steel, stainless steel, or aluminum, angle iron is widely used for structural support and framing, often in buildings, bridges, and other infrastructure projects. Its versatility is enhanced by the availability of different sizes and thicknesses, which can be adapted to suit the demands of diverse engineering and architectural projects.
Basic Information
More about angle steel shape , dimensions and theoretical weight, to see
EN 10365-2017(Structural steel equal and unequal leg angles)
equal leg angles
- a×b：20mm × 20mm - 300mm × 300mm
- t：3mm - 35mm
- also depend on requirements
unequal leg angles
- a×b：30mm × 20mm - 200mm × 150mm
- t：3mm - 15mm
- also depend on requirements
Common Types
By Shape:
- Equilateral Angle Steel: Both sides are of equal length, typically used in structural components for buildings, bridges, and transmission towers.
- Unequal Angle Steel: The sides have different lengths, suitable for complex structural designs where loads vary in different directions.
By Material:
- Carbon Steel Angle Steel: Made from carbon steel, it is known for its high strength and hardness and is commonly used in construction and machinery manufacturing.
- Alloy Steel Angle Steel: Contains alloy elements like chromium, manganese, and molybdenum, enhancing its mechanical properties and wear resistance.
- Stainless Steel Angle Steel: Offers excellent corrosion resistance and is used in applications where resistance to corrosion is crucial, such as in the chemical industry and shipbuilding
common Steel Grades
- ASTM (American Society for Testing and Materials): Grades like A36 and A572 are commonly used for structural applications.
- EN (European Norm): Grades such as S275 and S355 are used for various structural purposes.
- JIS (Japanese Industrial Standards): Grades like SM490 and SS400 are utilized in Japanese applications.
Chemical Composition
Carbon Steel:
- Carbon (C): 0.05% to 0.25%
- Manganese (Mn): 0.60% to 1.65%
- Silicon (Si): Up to 0.40%
- Phosphorus (P): Up to 0.04%
- Sulfur (S): Up to 0.05%
Additional elements such as Chromium (up to 1.5%), Manganese (up to 1.5%), and Molybdenum (up to 0.6%) are included to enhance mechanical properties and wear resistance.
Contains Chromium (at least 10.5%), Nickel, and other elements to provide corrosion resistance.
Mechanical Properties
- Tensile Strength: Ranges from 400 MPa to over 600 MPa, depending on the grade and material.
- Yield Strength: Typically between 250 MPa and 400 MPa.
- Elongation: Generally above 15% to 25%, ensuring good ductility.
Manufacturing Process
Selection: The primary raw material for angle steel is steel billet, typically made from low carbon steel due to its strength and weldability.
Inspection: The billets are inspected for quality to ensure they meet the required chemical composition and mechanical properties.
Furnace Heating: The steel billets are heated in a furnace to a high temperature. This process softens the steel, making it more malleable for shaping.
Hot Rolling: The heated billets are passed through a series of rolling mills to form the angle steel shape. The rolling process shapes the steel into the desired L-shaped profile.
Controlled Cooling: After rolling, the angle steel is cooled down. This is typically done using water or air to stabilize its shape and properties.
Cutting: The angle steel is cut to the required lengths using saws or shearing machines
Straightening: Any imperfections or bends are corrected using a straightening machine to ensure the steel is perfectly straight.
Surface Treatment
- Galvanizing: To enhance corrosion resistance, angle steel is often galvanized. This involves dipping the steel in molten zinc to form a protective coating.
- Painting: In some applications, the steel may also be painted for additional protection and aesthetic purposes.
Quality Inspection: The finished angle steel is inspected for dimensional accuracy, surface quality, and mechanical properties to ensure it meets industry standards.
Packaging: The angle steel is bundled and packaged for transportation, often in bundles to facilitate handling and storage.
Applications
Angle steel is widely used in various industries due to its strength and versatility:
Construction:
Used in building frameworks, bridges, and structural supports for roofs and floors.
01
Manufacturing:
Employed in the construction of machinery frames, equipment supports, and custom metal fabrication.
02
Transportation:
Utilized in vehicle frames, shipbuilding, and transmission towers.
03
Utilities and Infrastructure:
Commonly used in power line towers, railings, and fencing.
04
Home and DIY Projects:
Popular for furniture and décor due to its ease of use and industrial aesthetic
05
Advantages
- High Strength and Durability: Provides excellent load-bearing capacity and resistance to various stresses.
- Corrosion Resistance: Especially in stainless steel varieties, it can withstand harsh environments.
- Versatility: Available in various sizes and types, making it suitable for a wide range of applications.
- Economical and Practical: Generally cost-effective compared to other structural materials.
- Easy to Fabricate and Install: Can be easily cut, welded, and assembled to meet specific structural needs.
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