China Structural Steel Angle Bar Suppliers - High-Quality L-Shaped Steel from a Trusted Factory for Construction & Industrial Use
| 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 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 |
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.
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.
- 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
Used extensively in structural frameworks, roof trusses, columns, beams, and bracing systems for residential, commercial, and industrial buildings.
Essential components in bridges, transmission towers, telecommunication towers, and highway guardrails where structural integrity is critical.
Applied in factory buildings, equipment supports, crane runways, conveyor systems, and storage racks.
Used for machine frames, workbenches, brackets, shelving supports, and custom fabrications across various industries.
Employed in trailer manufacturing, vehicle frames, shipbuilding, and railway structures.
Supporting frames for solar panel installations and wind tower foundations.
Stainless steel or galvanized angles provide corrosion resistance for docks, piers, and offshore platforms.
Greenhouse structures, livestock equipment, and farm building frameworks.
Equal angle steel has two legs of identical length, providing symmetric load distribution ideal for general structural uses. Unequal angle steel has legs of different lengths, offering directional stiffness and optimized load resistance along a specific axis — commonly used in trusses and reinforcements.
Angle steel is available in lengths ranging from 3 m to 19 m. The most common standard lengths are 6 m, 9 m, and 12 m, which suit most construction and fabrication requirements. Custom lengths can often be arranged upon request.
For outdoor or corrosive environments, hot-dip galvanized angle steel (per ASTM A123) is the most common and cost-effective choice. For more demanding marine or chemical environments, stainless steel grades 304/L or 316/L (per ASTM A240) offer superior corrosion resistance.
Available surface finishes include Natural/Black (as-rolled mill scale), Shot Blasted/Pickled (clean surface ready for coating), Primed/Painted (shop-applied primer), Hot-Dip Galvanized (zinc coating for corrosion protection), and Oiled (temporary rust protection for transit and storage).
Yes. High-strength grades such as ASTM A572 (Grade 50, Grade 60) and ASTM A992 are specifically designed for load-bearing and high-stress structural applications, offering significantly higher yield strength compared to standard carbon steel grades like A36 or S235JR.
Angle steel is produced to a range of international standards including ASTM (A36, A572, A992, A240, A123) for North American markets, EN 10025 (S235JR, S275JR, S355JR) for European markets, GB/T 1591 (Q235B, Q345B) for Chinese standards, and JIS G3101 (SS400, SS490) for Japanese standards.