Angle Steel: The Versatile Building Block of Modern Construction

Understand the types, applications and benefits of Angle Steel basic structural materials

1. What is Angle Steel?

Commonly known as Angle Iron in the industry, angle steel is a long strip of steel formed by two perpendicular legs, typically made from carbon structural steel or low-alloy steel.

Key Classifications:

• Equal-leg angle steel: Both legs have identical dimensions (e.g., 50×50×5mm).

• Unequal-leg angle steel: Legs differ in length (e.g., 50×36×3mm), further divided into:

  • Equal-thickness: Same thickness for both legs.

  • Unequal-thickness: Varies in leg thickness.

2. Why Choose Angle Steel?

• High Strength-to-Weight Ratio: Provides robust support while minimizing material use.

• Cost-Effective: Lighter than many alternatives, reducing transportation and installation costs.

• Space-Saving Design: Fits seamlessly into tight spaces with flexible assembly options.

3. Applications Across Industries

Angle steel’s versatility makes it indispensable for:

• Construction: Building frames, roof trusses, and warehouse shelving.

• Infrastructure: Bridges, transmission towers, and tunnel supports.

• Industrial Uses: Shipbuilding, machinery mounts, and cable trays.

4. Specifications & Standards

• Naming Convention: Leg length × leg length × thickness (e.g., ∟63×63×5).

• Model Numbers: Represent leg width in centimeters (e.g., ∟3# = 30mm width).
  Note: Always specify thickness in contracts to avoid ambiguity.

• Weight Calculation:
  Formula: (Leg A + Leg B – Thickness) × Thickness × 0.00785 = Weight (kg/m).
  Example: ∟63×63×5 weighs (63+63–5)×5×0.00785 = 4.749 kg/m.

5. Production & Material Properties

• Raw Material: Low-carbon square steel billets.

• Process: Hot-rolled, delivered in normalized or as-rolled conditions.

• Performance: Excellent weldability, plasticity, and mechanical strength.

6. Industry Trends

• Green Manufacturing: Increased adoption of recycled steel in production.

• Precision Engineering: Tolerances tightened for high-rise and seismic-resistant structures.
  
  

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