Contact Platform Support
Help CenterSteel Angle & Custom Angle Steel Q195 Q215 Q235B Q355B Q355D
Related Products
-
Flat Steel & Steel Structure Flat Steel，Q235B、Q355B、20#、45#NegotiableMOQ: 5 Metric Tons -
Flat Steel & Steel Structure Flat Steel，Q235B、Q355B、20#、45#NegotiableMOQ: 5 Metric Tons
-
Flat Steel & Steel Structure Flat Steel，Q235B、Q355B、20#、45#NegotiableMOQ: 5 Metric Tons
-
Flat Steel & Steel Structure Flat Steel，Q235B、Q355B、20#、45#NegotiableMOQ: 5 Metric Tons
-
Steel Wire & High Strength Steel Wire，Q195, Q235, 45#, 60#, 65#, 70#NegotiableMOQ: 5 Metric Tons
I. Product Overview
Angle steel, also known as angle iron, is a hot-rolled section with an "L" shaped cross-section. It is divided into two categories: equal-angle steel and unequal-angle steel, consisting of two mutually perpendicular legs with uniform thickness and standard angle (usually 90°). As a highly versatile section, angle steel has the characteristics of simple structure, convenient processing, stable load-bearing capacity and high cost performance. It can be directly used for splicing, supporting and fixing without complex processing, and is widely applied in many fields such as construction, machinery, infrastructure, electric power and chemical industry. It is an indispensable basic component in various steel structure projects. With mature production technology, high dimensional accuracy and flat surface, it can be subjected to various surface treatments and deep processing according to requirements to adapt to the use needs of different working conditions.
II. Executive Standards
The products are strictly produced in accordance with national and industry standards, with qualified quality. Complete quality inspection reports and material certificates can be provided. The main executive standards are as follows:
National Standard: GB/T 706-2016 "Hot-Rolled Section Steel" (Special executive standard for angle steel, specifying requirements such as dimensional tolerance and mechanical properties)
Supplementary Standard: GB/T 3091-2015 "Welded Steel Pipes for Low Pressure Fluid Transport" (Reference for supporting use)
Industry Norms: In line with the construction quality acceptance standards for building steel structure projects, suitable for various civil engineering and installation engineering requirements
III. Material Grades, Chemical Composition and Mechanical Properties
(I) Main Material Grades
The commonly used materials of angle steel are mainly low-carbon steel and low-alloy steel, which adapt to different strength requirements. The main grades and application scenarios are as follows:
Q235B: The most commonly used general material, with good plasticity, toughness and excellent welding performance, moderate cost. It is suitable for non-load-bearing or secondary load-bearing scenarios such as ordinary buildings, supports and frames.
Q355B: High-strength material, whose yield strength and tensile strength are significantly higher than Q235B. It has low temperature resistance and impact resistance, and is suitable for high load-bearing scenarios such as heavy-duty structures, long-span supports and outdoor infrastructure.
Q355C/D: The low-temperature toughness is improved on the basis of Q355B, which is suitable for cold areas, outdoor environments or projects with strict toughness requirements (such as bridges and port facilities).
Q195/Q215: Low-carbon materials with low strength, mainly used for scenarios with low strength requirements such as light supports, railings and hardware processing, with prominent cost performance.
(II) Chemical Composition Reference Table (Mass Fraction %)
Material Grade |
Carbon C |
Silicon Si |
Manganese Mn |
Phosphorus P≤ |
Sulfur S≤ |
Q195 |
≤0.12 |
≤0.35 |
0.25-0.50 |
0.045 |
0.045 |
Q215 |
0.09-0.15 |
≤0.35 |
0.25-0.55 |
0.045 |
0.045 |
Q235B |
0.12-0.20 |
0.30-0.70 |
0.30-0.80 |
0.045 |
0.045 |
Q355B |
≤0.24 |
0.30-0.70 |
1.00-1.60 |
0.045 |
0.045 |
Q355D |
≤0.20 |
0.30-0.70 |
1.00-1.60 |
0.035 |
0.035 |
Note: The chemical composition strictly complies with national standards, with strict control of impurity elements, ensuring pure and stable material. Original factory material test reports and heat number traceability reports can be provided, and third-party testing is supported.
(III) Mechanical Properties Reference
Material Grade |
Yield Strength ≥ (MPa) |
Tensile Strength (MPa) |
Elongation ≥ (%) |
Impact Toughness (℃) |
Q195 |
195 |
315-430 |
33 |
Room Temperature |
Q215 |
215 |
335-450 |
31 |
Room Temperature |
Q235B |
235 |
370-500 |
26 |
20℃ (≥34J) |
Q355B |
355 |
470-630 |
21 |
20℃ (≥34J) |
Q355D |
355 |
470-630 |
21 |
-20℃ (≥34J) |
IV. Product Classification and Specifications
(I) Product Classification
Classified by leg size: Divided into equal-angle steel and unequal-angle steel.
Equal-angle steel: The two legs have the same length (e.g., ∠50×50×5), which is the most widely used and suitable for various symmetric structures, supports and frames.
Unequal-angle steel: The two legs have different lengths (e.g., ∠50×32×5), with matching long and short legs, suitable for structures with uneven stress, special-shaped supports and connectors.
Classified by production process: Hot-rolled angle steel (mainstream), cold-formed angle steel (niche, suitable for small-scale and high-precision scenarios).
Classified by surface treatment: Hot-rolled original angle steel, hot-dip galvanized angle steel, painted angle steel, adapting to different corrosive environments.
(II) Specification Expression Method
Equal-angle steel: ∠ Leg Width × Leg Width × Leg Thickness (mm), Example: ∠30×30×3, ∠50×50×5, ∠100×100×10.
Unequal-angle steel: ∠ Long Leg Width × Short Leg Width × Leg Thickness (mm), Example: ∠50×32×4, ∠80×50×6, ∠125×80×8.
(III) Routine Specification Range
Equal-angle steel: Leg width 20mm-200mm, leg thickness 3mm-20mm, conventional length 6m, 9m, 12m, customizable length 3-18m.
Unequal-angle steel: Long leg width 32mm-200mm, short leg width 20mm-125mm, leg thickness 3mm-18mm, conventional length 6m, 9m, 12m, customizable processing.
Note: Special specifications (extra-large leg width, extra-thick leg thickness) can be customized, and deep processing such as cutting, punching and beveling is supported.
V. Core Performance Advantages
Stable structure and uniform stress: The "L" shaped cross-section design can bear longitudinal pressure, transverse tension and shear force, with good torsion resistance and impact resistance, adapting to various stress scenarios.
Convenient processing and strong adaptability: It can be directly welded and bolted without complex pre-treatment, and can be flexibly spliced with various sections such as steel plates, H-beams and channel steels, with high construction efficiency.
Outstanding cost performance: Mature production technology and high raw material utilization rate. Compared with other sections, it saves more materials under the same load-bearing requirements, reducing project costs.
Diversified materials and wide adaptability: From ordinary low-carbon steel to high-strength low-alloy steel, suitable materials can be selected according to project requirements, balancing strength and cost.
Flexible surface treatment: Different surface treatment methods can be selected according to the use environment to improve corrosion resistance and extend service life.
VI. Wide Application Scenarios
Construction Engineering: Steel structure factory frames, columns, beam supports, residential balcony railings, stair handrails, curtain wall keels, door and window frames, building formwork supports.
Infrastructure: Bridge supports, port and terminal railings, street lamp pole supports, highway guardrails, municipal pipe network supports, photovoltaic supports, wind power foundation supports.
Mechanical Manufacturing: Mechanical equipment bases, supports, operating platform frames, agricultural machinery and engineering machinery parts, container corner pieces, warehousing shelves.
Electric Power and Chemical Industry: Power plant supports, transmission line towers, chemical equipment supports, pipeline fixed supports, anti-corrosion equipment frames.
Other Fields: Hardware product processing, railings, fences, marine accessories, mine supports, small-scale steel structure construction.
VII. Surface Treatment Methods
Hot-rolled original: Basic anti-rust treatment, surface sprayed with anti-rust oil, low cost, suitable for indoor dry environments and non-corrosive scenarios (such as indoor supports, warehousing shelves).
Hot-dip galvanizing: Immerse the angle steel in molten zinc to form a uniform zinc layer (zinc layer thickness ≥85μm), with excellent corrosion resistance, moisture resistance and strong corrosion resistance. It is suitable for outdoor, coastal and humid environments, with a service life of more than 20 years.
Painting treatment: Epoxy zinc-rich primer + anti-corrosion topcoat is adopted, and the color can be customized (such as gray, blue), which has both anti-corrosion and aesthetic properties, suitable for scenarios with high appearance requirements (such as building curtain walls, indoor decoration supports).
VIII. Packaging, Delivery and Logistics
Packaging: Bundled with steel strips, each bundle weighs 2-5 tons, with protective sleeves installed at the ends (to prevent collision deformation) and wrapped with anti-rust film outside; customized packaging (such as fumigated pallets, reinforced bundling) can be provided according to requirements, suitable for long-distance transportation.
Length: Conventional length 6m, 9m, 12m; customized processing is supported, with a customized length range of 3-18m. Cutting, punching, beveling and other deep processing can be carried out according to customer requirements.
Delivery Cycle: Sufficient spot inventory, delivery cycle of conventional specifications is 3-5 days; delivery cycle of customized specifications and deep processing products is 7-15 days, which can be negotiated in detail.
Logistics: National distribution is supported, relying on major logistics hubs, full vehicle and less-than-carload shipment can be arranged; if export is needed, port direct shipment (Qingdao, Tianjin, Shanghai, etc.) can be arranged, suitable for container loading, and a complete set of logistics solutions is provided.
IX. Quality Assurance
Raw Material Control: High-quality national standard steel billets are selected, and each batch of raw materials is subject to chemical composition testing to prevent unqualified raw materials from entering the factory.
Production Control: Full-process automatic hot-rolling production, online dimensional monitoring and temperature control, ensuring that the product dimensional tolerance and angle accuracy meet the GB/T 706-2016 standard.
Finished Product Inspection: Each batch of products undergoes comprehensive inspection of mechanical properties, chemical composition, dimensional deviation and surface quality, and unqualified products are strictly prohibited from leaving the factory.
Quality Traceability: Each batch of products is marked with a heat number, which can realize full-process traceability from raw materials to finished products. Original factory quality inspection reports and material lists can be provided, and third-party agency sampling inspection is supported.
X. Supplementary Instructions
This product can be customized according to customer specific requirements (material, specification, surface treatment, deep processing, packaging) to adapt to various engineering scenarios; direct supply from the manufacturer, no middlemen, prominent cost performance, preferential prices for bulk purchase can be provided, various orders are undertaken for a long time, and technical consultation and after-sales guarantee are provided throughout the process.
Send Inquiry to This Supplier
You May Also Like
-
Steel Wire & High Strength Steel Wire，Q195, Q235, 45#, 60#, 65#, 70#NegotiableMOQ: 5 Metric Tons
-
Steel Wire & High Strength Steel Wire，Q195, Q235, 45#, 60#, 65#, 70#NegotiableMOQ: 5 Metric Tons
-
Steel Wire & High Strength Steel Wire，Q195, Q235, 45#, 60#, 65#, 70#NegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Custom Reinforcing Bar，HPB300, HRB400, HRB400E, HRB500, HRB500E, PSBNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Custom Reinforcing Bar，HPB300, HRB400, HRB400E, HRB500, HRB500E, PSBNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Custom Reinforcing Bar，HPB300, HRB400, HRB400E, HRB500, HRB500E, PSBNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Custom Reinforcing Bar，HPB300, HRB400, HRB400E, HRB500, HRB500E, PSBNegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Checkered Steel Plate，Q235B、Q355B、Q235NH、Q355NHNegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Checkered Steel Plate，Q235B、Q355B、Q235NH、Q355NHNegotiableMOQ: 5 Metric Tons
-
Steel Sheet & Plate & Checkered Steel Plate，Q235B、Q355B、Q235NH、Q355NHNegotiableMOQ: 5 Metric Tons
