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Help CenterSteel Angle & Fixed Length Angle Steel，GB/T 706-2016、GB/T 700（Q235）、GB/T 1591（Q355）、ISO 657-1、ASTM A36、EN 10056-1
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Flat Steel & Engineering Flat Steel，Q355B/D、Q460、65Mn、60Si2Mn、Q235B、Q195、45#NegotiableMOQ: 5 Metric Tons
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Flat Steel & Engineering Flat Steel，Q355B/D、Q460、65Mn、60Si2Mn、Q235B、Q195、45#NegotiableMOQ: 5 Metric Tons
1. Product Classification
1.1 Classification by Cross-Section Shape (Core Classification)
Equal Angle Steel: Both sides have the same width, marked as "∠ side width × side thickness", e.g. ∠50×50×5mm. The model is represented by the centimeter value of side width (e.g. 5#), with specifications ranging from 2# to 20# (side width 20–200mm).
Unequal Angle Steel: The two sides have different widths, marked as "∠ long side × short side × side thickness", e.g. ∠63×40×6mm. Specifications range from 3.2/2# to 20/12.5#, including equal-thickness and unequal-thickness types.
1.2 Classification by Production Process
Hot Rolled Angle Steel: The mainstream process with high strength and low cost, complying with GB/T 706-2016.
Cold Formed Angle Steel: Features uniform wall thickness, high precision and smooth surface, suitable for light-duty structures, complying with GB/T 6723-2017.
Galvanized Angle Steel: Treated by hot-dip galvanizing with a zinc layer of 30–50μm, excellent corrosion resistance, applicable for outdoor and humid environments.
1.3 Classification by Material Grade
Carbon Structural Steel: Q235B (most commonly used), Q275, with high cost performance.
High-Strength Low-Alloy Steel: Q355B with higher strength, applied for heavy-load structures.
2. Specifications and Dimensions (National Standard GB/T 706-2016)
2.1 Conventional Equal Angle Steel
Model |
Side Width (mm) |
Side Thickness (mm) |
Theoretical Weight (kg/m) |
3# |
30 |
3/4 |
1.373/1.786 |
5# |
50 |
3/4/5 |
2.332/3.059/3.770 |
6.3# |
63 |
4/5/6 |
3.907/4.822/5.721 |
10# |
100 |
6/8/10 |
9.366/12.276/15.120 |
2.2 Conventional Unequal Angle Steel
Model |
Long Side × Short Side (mm) |
Side Thickness (mm) |
Theoretical Weight (kg/m) |
4/2.5# |
40×25 |
3/4 |
1.484/1.936 |
6.3/4# |
63×40 |
4/5/6 |
4.058/5.005/5.929 |
10/6.3# |
100×63 |
6/8/10 |
7.550/9.878/12.142 |
2.3 Length and Tolerance
Standard fixed lengths: 4m, 6m, 9m, 12m (6m/12m are the most commonly used).
Dimension tolerance: side width ±1mm; side thickness ±0.3–±0.5mm; bending degree ≤3mm/m.
3. Material, Chemical Composition and Mechanical Properties (Q235B as Standard)
Chemical Composition (%): C≤0.22, Mn=0.30–0.65, P≤0.045, S≤0.045.
Mechanical Properties: Tensile strength 370–500MPa, yield strength ≥235MPa, elongation ≥26%.
4. Core Advantages
Flexible Structure: It can be assembled into various force-bearing components and connectors, adapting to complex structural requirements.
Reliable Strength: The hot rolling process ensures stable mechanical properties and excellent load-bearing capacity.
Easy Installation: Supports cutting, welding and bolt connection, greatly improving construction efficiency.
Cost-Effective and Durable: Q235B features low cost and high practicability; galvanized products have extended service life and adapt to various working conditions.
5. Main Applications
Building Structure: Factory frames, beam components, stair handrails, curtain wall supports.
Power and Communication: Transmission towers, cable trench supports, busbar brackets.
Machinery Manufacturing: Equipment bases, support frames, mechanical racks, lifting machinery parts.
Municipal Engineering: Bridge guardrails, street lamp bases, municipal supporting structures.
Warehousing and Logistics: Storage shelves, pallet supports, warehouse partition frames.
6. Executive Standards
National Standards: GB/T 706-2016 (Dimension, Tolerance & Weight), GB/T 700 (Q235 Steel), GB/T 1591 (Q355 Steel).
Inspection Standard: GB/T 2101-2017 (Product Packaging, Marking and Quality Certification).
International Standards: ISO 657-1, ASTM A36, EN 10056-1.
7. Packaging & Delivery
Packaging: Delivered in bundles (2–5 tons per bundle) with anti-rust paint or galvanized surface treatment. Both ends are labeled with specifications, material and batch number.
Delivery Cycle: 3–7 days for conventional in-stock products
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