Angle Steel Comprehensive Analysis: Classification System and Engineering Application Guide

Angle steel, as an important structural material, can be classified into various types according to different standards. Below is a systematic classification of angle steel from multiple dimensions to help you comprehensively understand its categories and characteristics.

1、Classification by Production Process

(1) Hot-rolled Angle Steel
Process characteristics: Rolled at high temperature (approximately 1200°C)
Features:

High strength and load-bearing capacity

Dense internal structure with excellent mechanical properties

Suitable for large structural components
Typical applications: Main building structures, bridges, heavy machinery

(2) Cold-formed Angle Steel
Process characteristics: Processed by cold bending forming machine at room temperature
Features:

High surface smoothness

Good dimensional accuracy

Capable of producing complex cross-sectional shapes
Typical applications: Light structures, decorative engineering, electrical cabinets

(3) Extruded Angle Steel
Process characteristics: Formed by mold extrusion
Features:

Capable of producing special-shaped cross-sections

Excellent surface quality
Typical applications: Special industrial uses, aerospace field

Classification by Cross-sectional Shape

(1) Equal-leg Angle Steel
Example specification: 50×50×5mm
Features:

Equal leg lengths

Symmetrical force distribution

Easy installation

Large inventory availability
Standards: GB/T 706, ASTM A36, etc.

(2) Unequal-leg Angle Steel
Example specification: 100×75×8mm
Features:

Unequal leg lengths

Adapts to asymmetric load requirements

Material-saving
Typical applications: Special brackets, non-standard connecting elements

(3) Special-shaped Angle Steel
Includes: Rounded-corner angle steel, chamfered angle steel, etc.
Features:

Safer edge treatment

Higher aesthetic quality

Meets special functional requirement

2、Classification by material 

3、 Angle steel processing and installation

Cutting: Angle grinder, laser cutting or sawing machine processing.Connection: welded,bolted or rivetedAnti corrosion treatment: coating anti rust paint, hot dip galvanized orstainless steel material