What Is Steel Angle Iron? Types, Sizes, and Common Applications
Steel angle iron, also known as angle steel or steel metal angle, is one of the most commonly used structural materials in construction and manufacturing. Shaped like an “L”, this product offers excellent strength, stability, and versatility, making it suitable for a wide range of projects. Whether in building frameworks, machinery fabrication, or shelving systems, steel angle plays a vital role due to its durability and cost-effectiveness.
Types of Steel Angle Iron
Steel angle iron can be classified into several categories depending on production method and surface treatment:
1. Equal Angle Steel
Both sides are of equal length.
Widely used in structural supports, bridges, and general construction.
2. Unequal Angle Steel
One side is longer than the other.
Commonly applied in shipbuilding, towers, and frames where different load-bearing capacity is required.
3. Hot Rolled Steel Angle
Manufactured by hot rolling process.
Offers good toughness and is suitable for heavy-duty applications.
4. Galvanized Steel Metal Angle
Coated with a layer of zinc for corrosion resistance.
Best choice for outdoor projects or humid environments.
Steel Angle Sizes
One of the key factors when choosing angle steel is the dimension. Different steel angle sizes are available to meet specific project requirements. Common dimensions include:
Side length: 20mm to 250mm
Thickness: 2mm to 20mm
Length: Usually supplied in 6m, 9m, or 12m standard bars, but can be customized
The following are some commonly used steel angle sizes in the market. These can be customized according to specific project requirements:
| Side (mm × mm) | Thickness (mm) | Length (m) | Common Applications |
|---|---|---|---|
| 20 × 20 | 3 – 4 | 6 / 9 / 12 | Light frames, shelves, small DIY projects |
| 25 × 25 | 3 – 5 | 6 / 9 / 12 | Furniture, brackets, small structures |
| 40 × 40 | 4 – 6 | 6 / 9 / 12 | Building supports, frames |
| 50 × 50 | 4 – 8 | 6 / 9 / 12 | Construction, fabrication, reinforcement |
| 65 × 65 | 5 – 9 | 6 / 9 / 12 | Heavy-duty racks, machinery support |
| 75 × 75 | 6 – 10 | 6 / 9 / 12 | Bridges, towers, structural frames |
| 100 × 100 | 6 – 12 | 6 / 9 / 12 | Large-scale construction, workshops |
| 125 × 125 | 8 – 12 | 6 / 9 / 12 | Industrial equipment, structural steel |
| 150 × 150 | 10 – 15 | 6 / 9 / 12 | Heavy machinery, power structures |
| 200 × 200 | 12 – 20 | 6 / 9 / 12 | Infrastructure, towers, bridges |
The selection of steel angle sizes depends on the load capacity, design, and intended application. For example, smaller sizes are often used in light frames or shelves, while larger and thicker steel angles are required for structural engineering and heavy equipment.
Common Applications of Steel Angle Iron
Steel angle iron has countless applications across industries:
1. Construction and Infrastructure
Used in building frames, bridges, and roof structures.
Provides reliable support and stability for both small and large projects.
2. Manufacturing and Fabrication
Serves as a key material for machinery, industrial equipment, and transportation vehicles.
Easy to weld, cut, and shape.
3. Storage and Shelving
Steel metal angle is ideal for warehouse racks, shelves, and frames.
Offers strength to support heavy loads.
4. owers and Power Structures
Widely used in telecom towers, transmission lines, and other load-bearing frameworks.
5. Household and DIY Projects
Popular among fabricators and home builders for gates, fences, and furniture reinforcement.
Why Choose Steel Angle Iron?
Strength & Durability – Provides excellent resistance to bending and compression.
Versatility – Available in multiple steel angle sizes to suit various needs.
Cost-Effective – Affordable structural steel solution compared to other profiles.
Easy Fabrication – Can be cut, drilled, or welded to match project requirements.
Steel angle iron (also referred to as angle steel or steel metal angle) is a fundamental material in both construction and manufacturing. With a wide variety of steel angle sizes, it serves as a reliable choice for frameworks, support structures, shelves, and industrial equipment. If you are looking for a durable, versatile, and cost-effective solution, steel angle iron is the perfect option for your project.
Shineyond Group offers high-quality steel angles with international standards, competitive prices, and fast delivery worldwide. Contact us today to get a quote for your required steel angle sizes.
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