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
Type of material | Features | Typical criteria | Primary use |
Ordinary carbon steel Angle steel | Low cost and moderate strength | Q235B,SS400 | General building Structure |
High quality carbon steel Angle steel | Better mechanical properties | 45#,20# | Mechanical parts |
Low alloy high strength steel | High strength. light weight | Q345B,A572 | Heavy construction |
Stain less steel Angle steel | Strong corrosion res1stance | 304,316 | Chemical,food equipment |
Weathering steel Angle steel | Resistance to atmospheric corrosion | Corten steel | Long term outdoor use |
Galvanized Angle steel | Strong rust resistance | ASTM A123 | Humid conditions |
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
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