Structural Steel Angle Bar for Construction and Industrial Applications
Specifications
| Parameter | Range / Options |
| Size Range (Equal) | 20×20 mm: 250×250 mm (2#: 20# in Chinese standard) |
| Size Range (Unequal) | 25×16 mm: 200×125 mm |
| Wall Thickness | 2.0 mm: 25 mm (varies by size) |
| Length | 3 m: 19 m (standard: 6m, 9m, 12m) |
Material standard
| Material Type | Standard | Common Grades |
| Carbon Steel | ASTM A36 | A36 (general structural, 36,000 psi yield) |
| EN 10025 | S235JR, S275JR, S355JR/J0/J2 | |
| GB/T 1591 | Q235B, Q345B (equivalent to S235JR/S355JR) | |
| JIS G3101 | SS400, SS490, SS540 | |
| High Strength | ASTM A572 | Grade 50, Grade 60 |
| ASTM A992 | High-strength low-alloy for load-bearing frames | |
| Stainless Steel | ASTM A240 | 304/L, 316/L (corrosion-resistant applications) |
| Galvanized | ASTM A123 | Hot-dip galvanized coating on base steel |
Types of Angle Steel
Equal Angle Steel:
Both legs have identical length, forming a symmetric L-profile. This balanced geometry distributes stress evenly along both axes, making it ideal for uniform frameworks, square frames, racks, and general structural applications where loads come from multiple directions.
Unequal Angle Steel:
Legs have different lengths, creating directional strength characteristics. The longer leg increases the moment of inertia about one axis, improving stiffness and load resistance in that specific direction. Commonly used in trusses, reinforcements, and structures requiring optimized load distribution.
Surface Finishes
● Natural / Black Finish: As-rolled with mill scale
● Shot Blasted / Pickled: Clean surface for painting or further treatment
● Primed / Painted: Shop-applied primer coating
● Hot-Dip Galvanized: Zinc coating per ASTM A123 for corrosion protection
● Oiled: Temporary rust protection during transit
Applications
Building Construction: Used extensively in structural frameworks, roof trusses, columns, beams, and bracing systems for residential, commercial, and industrial buildings.
Infrastructure Projects: Essential components in bridges, transmission towers, telecommunication towers, and highway guardrails where structural integrity is critical.
Industrial Facilities: Applied in factory buildings, equipment supports, crane runways, conveyor systems, and storage racks.
Manufacturing & Fabrication: Used for machine frames, workbenches, brackets, shelving supports, and custom fabrications across various industries.
Transportation: Employed in trailer manufacturing, vehicle frames, shipbuilding, and railway structures.
Renewable Energy: Supporting frames for solar panel installations and wind tower foundations.
Marine and Offshore: Stainless steel or galvanized angles provide corrosion resistance for docks, piers, and offshore platforms.
Agricultural Applications: Greenhouse structures, livestock equipment, and farm building frameworks.