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Help CenterSteel Angle & Steel Structure Angle Steel，GB/T 706-2016、GB/T 700-2006、GB/T 1591-2018
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Steel Angle & Steel Structure Angle Steel，GB/T 706-2016、GB/T 700-2006、GB/T 1591-2018NegotiableMOQ: 5 Metric Tons -
Steel Angle & Steel Structure Angle Steel，GB/T 706-2016、GB/T 700-2006、GB/T 1591-2018NegotiableMOQ: 5 Metric Tons
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Steel Angle & Steel Structure Angle Steel，GB/T 706-2016、GB/T 700-2006、GB/T 1591-2018NegotiableMOQ: 5 Metric Tons
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Steel Angle & Steel Structure Angle Steel，GB/T 706-2016、GB/T 700-2006、GB/T 1591-2018NegotiableMOQ: 5 Metric Tons
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Steel H Beam & Load-Bearing H Beam，Q235B、Q355B、 Q420B、Q235C/DNegotiableMOQ: 5 Metric Tons
Detailed Description of Angle Steel Products
Angle Steel (commonly known as Angle Iron) is a long strip of steel with two sides perpendicular to each other forming an L-shape. It is a simple section steel, widely used in construction, machinery, bridges, transmission towers and other fields. Its material, model, specification and size can be flexibly selected according to the application scenario to adapt to different force-bearing and environmental requirements.
I. Product Classification
1. Classified by Side Length
Equal Angle Steel: Both sides are of equal length, and the specification is expressed as "side width × side width × side thickness", such as ∠50×50×5, which is suitable for most general scenarios.
Unequal Angle Steel: The two sides are of unequal length, and the specification is expressed as "long side × short side × side thickness", such as ∠63×40×5. It is divided into equal thickness and unequal thickness, suitable for structural parts with uneven force bearing.
2. Classified by Process
Hot-Rolled Angle Steel: As the mainstream product, it implements the standard GB/T 706-2016, with natural oxide scale on the surface, high strength and low price, and is currently the most used category in the market.
Cold-Rolled Angle Steel: It has high dimensional accuracy and smooth surface, is used for precision components, has a high price, and is suitable for scenarios with strict requirements on dimensional errors.
Galvanized Angle Steel: Divided into hot-dip galvanizing (thick zinc layer, strong corrosion resistance) and cold galvanizing (thin zinc layer, low cost), it is suitable for outdoor, humid, acid-base and other corrosive environments.
II. Material, Model and Specification Dimensions (National Standard GB/T 706-2016)
The material of angle steel determines its mechanical properties, and the model corresponds to the specification and size. Different materials are suitable for different specifications. The specific classification and parameters are as follows, covering common categories, and special specifications can be customized on demand.
(I) Common Materials and Corresponding Applicable Models, Specifications and Dimensions
1. Q235B (Carbon Structural Steel)
Yield strength ≥ 235MPa, cost-effective, used for ordinary buildings and light force-bearing structures. It is the most commonly used basic material, covering the full range of conventional specifications of equal angle steel and unequal angle steel.
Model and Dimensions of Equal Angle Steel: 2#～20# (side length 20mm～200mm), side thickness 3mm～24mm, length 6m/9m/12m (customizable 3～19m multiple length). The specific common specifications are as follows:
2#: ∠20×20×3 (theoretical weight 0.89kg/m), ∠20×20×4 (1.14kg/m)
3#: ∠30×30×3 (1.37kg/m), ∠30×30×4 (1.78kg/m)
5#: ∠50×50×5 (3.73kg/m), ∠50×50×6 (4.38kg/m), ∠50×50×7 (5.01kg/m)
8#: ∠80×80×6 (7.38kg/m), ∠80×80×8 (9.66kg/m), ∠80×80×10 (11.87kg/m)
10#: ∠100×100×8 (12.28kg/m), ∠100×100×10 (15.12kg/m), ∠100×100×12 (17.89kg/m)
16#: ∠160×160×10 (24.22kg/m), ∠160×160×12 (28.72kg/m)
20#: ∠200×200×12 (37.24kg/m), ∠200×200×16 (48.68kg/m), ∠200×200×20 (59.82kg/m)
Model and Dimensions of Unequal Angle Steel: Long side 25mm～200mm, short side 16mm～125mm, side thickness 4mm～18mm, length 6m/9m/12m (customizable). The specific common specifications are as follows:
∠25×16×4 (1.16kg/m), ∠32×20×4 (1.49kg/m)
∠40×25×4 (1.86kg/m), ∠40×25×5 (2.27kg/m)
∠63×40×5 (3.89kg/m), ∠63×40×6 (4.64kg/m)
∠80×50×6 (5.61kg/m), ∠80×50×8 (7.32kg/m)
∠100×63×8 (9.82kg/m), ∠100×63×10 (12.01kg/m)
∠160×100×10 (19.87kg/m), ∠160×100×12 (23.59kg/m)
∠200×125×12 (29.76kg/m), ∠200×125×16 (38.98kg/m)
2. Q355B (Low Alloy High Strength Steel)
Yield strength ≥ 355MPa, tensile strength 470～630MPa, elongation ≥ 21%, used for heavy load, earthquake resistance and low temperature environment (-20℃ applicable). The specifications cover medium and large angle steel, suitable for scenarios with high strength requirements.
Model and Dimensions of Equal Angle Steel: 5#～20#, side thickness 5mm～24mm, length 6m/9m/12m (customizable). Common specifications:
∠50×50×5 (3.73kg/m), ∠50×50×8 (4.88kg/m)
∠80×80×8 (9.66kg/m), ∠80×80×12 (11.87kg/m)
∠100×100×10 (15.12kg/m), ∠100×100×16 (19.51kg/m)
∠160×160×12 (28.72kg/m), ∠160×160×16 (37.41kg/m)
∠200×200×16 (48.68kg/m), ∠200×200×24 (69.91kg/m)
Model and Dimensions of Unequal Angle Steel: Long side 63mm～200mm, short side 40mm～125mm, side thickness 6mm～18mm, length 6m/9m/12m (customizable). Common specifications:
∠63×40×6 (4.64kg/m), ∠63×40×8 (5.92kg/m)
∠80×50×8 (7.32kg/m), ∠80×50×10 (8.98kg/m)
∠100×63×10 (12.01kg/m), ∠100×63×14 (16.69kg/m)
∠160×100×12 (23.59kg/m), ∠160×100×16 (30.93kg/m)
∠200×125×16 (38.98kg/m), ∠200×125×18 (43.49kg/m)
3. 20#/45# (High-Quality Carbon Steel)
20# steel (yield strength ≥ 245MPa) and 45# steel (yield strength ≥ 355MPa) have uniform material and good toughness. They are used for mechanical processing, shafts, flanges and precision components. The specifications are mainly small and medium-sized angle steel, which can be processed and customized on demand.
Model and Dimensions of 20# Angle Steel: 2#～10#, side thickness 3mm～10mm, length 3m～12m (customizable). Common specifications: ∠20×20×3, ∠30×30×4, ∠50×50×5, ∠80×80×6, ∠100×100×8.
Model and Dimensions of 45# Angle Steel: 3#～12#, side thickness 4mm～12mm, length 3m～12m (customizable). Common specifications: ∠30×30×4, ∠50×50×6, ∠80×80×8, ∠100×100×10, ∠120×120×10.
(II) Supplementary General Parameters
Length Standard: Regular fixed lengths are 6m, 9m and 12m; 3～19m multiple lengths can be customized; special lengths need to be negotiated in advance.
Theoretical Weight Formula: W(kg/m)=0.00785×side thickness×(2×side width−side thickness) (for equal angle steel); W(kg/m)=0.00785×side thickness×(long side + short side−side thickness) (for unequal angle steel).
Dimensional Tolerance: The tolerances of side width, side thickness and vertex angle comply with the standard GB/T 706-2016, the bending degree ≤ 0.3% × length, and there is no significant torsion.
III. Materials and Implementation Standards
1. Summary of Common Materials
Q235B: Carbon structural steel with a yield strength of 235MPa, cost-effective, used for ordinary structures and light force-bearing scenarios.
Q355B: Low alloy high strength steel with a yield strength of 355MPa, used for heavy load, earthquake resistance and low temperature environments.
20#/45#: High-quality carbon steel with uniform material and good toughness, used for mechanical processing and precision components.
2. Core Implementation Standards
GB/T 706-2016 (Hot-Rolled Section Steel): Specifies the dimensions, shape, weight and allowable deviation of angle steel.
GB/T 700-2006 (Carbon Structural Steel): Regulates the technical requirements of carbon steels such as Q235B, 20# and 45#.
GB/T 1591-2018 (Low Alloy High Strength Steel): Regulates the mechanical properties and technical indicators of low alloy steels such as Q355B.
GB/T 3280-2015 (Cold-Rolled Stainless Steel Plates and Strips): Regulates the material requirements of 304/316 stainless steel.
IV. Mechanical Properties (Typical Values of Each Material)
Q235B: Yield strength ≥ 235MPa, tensile strength 370～500MPa, elongation ≥ 26%, 180° cold bending test qualified, no cracks.
Q355B: Yield strength ≥ 355MPa, tensile strength 470～630MPa, elongation ≥ 21%, 180° cold bending test qualified, low-temperature impact performance qualified (-20℃).
20# Steel: Yield strength ≥ 245MPa, tensile strength ≥ 410MPa, elongation ≥ 25%, excellent toughness and easy processing.
45# Steel: Yield strength ≥ 355MPa, tensile strength ≥ 600MPa, elongation ≥ 16%, high strength, suitable for mechanical components with large force bearing.
V. Surface Quality and Appearance
Surface: No harmful defects such as cracks, scars, delamination and inclusions; hot-rolled angle steel allows slight oxide scale, rust and pitting; cold-rolled angle steel has a smooth surface without obvious oxidation; galvanized angle steel has a uniform zinc layer without missing plating, peeling and falling off.
Shape Deviation: Bending degree ≤ 0.3% × length, no significant torsion; side width, side thickness and vertex angle meet national standard tolerances, no obvious deformation.
VI. Product Advantages
Stable Structure: The L-shaped section has strong bending and compression resistance, is not easy to deform, and is suitable for various force-bearing scenarios.
Convenient Processing: It can be cut, welded, drilled and bent, adapting to various connection methods (bolt/welding/riveting) with low processing cost.
Cost-Effective: The hot-rolling process is mature, the price is lower than that of H-beam and channel steel, with high load-bearing efficiency and strong versatility.
Corrosion Resistance Option: Galvanized/stainless steel materials can be selected according to the environment to extend the service life in outdoor and corrosive environments.
Environmentally Friendly and Recyclable: Waste angle steel can be recycled and smelted again, complying with the requirements of green buildings and environmentally friendly production.
Complete Specifications: It covers a variety of materials, models and sizes, and special specifications can be customized to adapt to the needs of different industries.
VII. Main Uses
Building Structure: Plant frames, beams and columns, supports, stairs, guardrails, curtain wall keels. Q235B and Q355B materials are preferred, and corresponding specifications are selected according to force bearing.
Engineering Facilities: Transmission towers, communication towers, bridge supports, municipal guardrails, street lamp pole bases. For outdoor scenarios, galvanized angle steel or Q355B material is preferred.
Mechanical Manufacturing: Equipment bases, frames, supports, conveyor frames, agricultural machinery parts. 20#/45# high-quality carbon steel or Q355B material is preferred.
Warehousing and Logistics: Shelves, pallets, container frames, warehouse partitions. Q235B material is selected, and side thickness and side length are selected according to load-bearing.
Others: Shipbuilding and repair (galvanized is selected), cable trench supports, busway installation, furniture frames (industrial style, cold-rolled or hot-rolled angle steel is selected).
VIII. Packaging and Delivery
Packaging: Delivered in bundles, each bundle is 2～5 tons, firmly bound. The label indicates the specification, material, batch number, weight and manufacturer to prevent deformation and rust during transportation.
Delivery Status: Hot-rolled angle steel (natural oxidation state), normalizing state (customizable on demand), galvanized angle steel (hot-dip galvanizing/cold galvanizing state); a quality certificate is provided with the goods, indicating material, mechanical properties, specification and size and other parameters to ensure the product is qualified.
Delivery Cycle: 5-7 days.
IX. Purchasing Points
Material Adaptation: Q235B is used for ordinary environments, Q355B for heavy load/low temperature, and 20#/45# for mechanical processing.
Specification Matching: Select side length and side thickness according to force calculation, avoid "over-specification" or "under-specification", refer to theoretical weight and mechanical properties to ensure structural safety.
Surface Inspection: No cracks, no obvious torsion, qualified dimensional tolerance; check the uniformity of the zinc layer for galvanized angle steel, and the surface finish for stainless steel angle steel.
Length Selection: Priority is given to fixed lengths (6m/9m/12m) to reduce splicing and lower processing and installation costs; special lengths need to be negotiated with the manufacturer in advance for customization.
Standard Confirmation: Ensure the product meets the corresponding national standard requirements, request a quality certificate, and verify parameters such as material, specification and mechanical properties.
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