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Help CenterAngle Steel & Angle Bar，ASTM A36, JIS G3101, EN S235JR/S355JR, SS400
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Angle steel (angle iron) is a long strip structural steel with two mutually perpendicular sides in L-shape, widely used in civil engineering, steel structure frames and mechanical manufacturing. Our main products includehot rolled angle steel, galvanized angle steel and unequal angle steel. With complete specifications, stable mechanical performance, excellent weldability and bendability, our angle steel can be directly used for cutting, welding, punching and assembling. Suitable for various load-bearing and connecting structural projects, the products enjoy sufficient stock, stable delivery and high cost performance for domestic and overseas engineering procurement.
1. Core Material Grades
All angle steel adopts high-quality standard steel billets with pure material, low impurities and stable mechanical indicators, fully meeting national engineering standards and international export inspection requirements. Available material grades are as follows:
Q195: High toughness and good plasticity, easy to bend and process. It is mainly used for light-duty supports, simple frames and general decorative structures, serving as the economical grade for ordinary hot rolled angle steel.
Q235B: The most popular general carbon steel grade with balanced strength, toughness and weldability. It adapts to most building structures, bracket manufacturing and engineering connection components, and is the mainstream base material for galvanized angle steel and conventional structural angle steel.
Q355B: Low-alloy high-strength steel with higher tensile strength, compression resistance and impact resistance than Q235B. Ideal for heavy-load steel frames, bridge auxiliary structures, mechanical equipment supports and large-scale infrastructure projects.
45# Carbon Steel: High hardness and wear resistance, suitable for precision mechanical parts, high-strength structural accessories and industrial customized components requiring high rigidity.
Export Special Grades: SS400, ASTM A36, S235JR, S355JR, fully compliant with European, American and Southeast Asian international standards, specially supplied for overseas engineering and foreign trade orders.
2. Product Classification & Process Features
2.1 Hot Rolled Angle Steel
Hot rolled angle steel is integrally formed by high-temperature continuous hot rolling process. It features uniform metallographic structure, stable overall strength, flat surface and precise right-angle verticality. Without internal cracks, folding or slag inclusion, it has excellent welding, bending and punching performance. It can be directly processed and installed without secondary finishing. Widely used in factory steel frames, building supports, structural connection parts and tower manufacturing, it is the most versatile and cost-effective structural steel profile.
2.2 Galvanized Angle Steel
Galvanized angle steel is produced by hot-dip galvanizing or electro-galvanizing treatment on qualified hot-rolled base steel. The dense and adhesive zinc layer isolates air, moisture and acid-base corrosion, providing long-term rust-proof and weather-resistant performance. The surface is bright and uniform without missing plating or peeling. No additional anti-rust paint is required. It is the preferred material for outdoor structures, coastal environments, humid workshops, municipal guardrails and power engineering supports.
2.3 Unequal Angle Steel
Unequal angle steel refers to L-shaped steel with different widths of two sides. It adopts optimized asymmetric section design, which can bear uneven lateral pressure and adapt to special structural stress conditions that equal angle steel cannot meet. With stable torsion resistance and strong structural adaptability, it is widely used for mechanical equipment frames, vehicle manufacturing, ship auxiliary structures, building special supports and irregular engineering connection parts.
3. Executive Standards
Domestic Standards: GB/T 700-2006, GB/T 1591-2018, GB/T 9787-2008 Hot-rolled Equal & Unequal Angle Steel
Galvanizing Standard: GB/T 13912-2002 Hot-Dip Galvanized Coating Specification
International Standards: ASTM A36, JIS G3101, EN S235JR/S355JR, SS400. Complete material certificates, inspection reports and factory qualification documents can be provided for overseas project acceptance.
4. Specification Parameters
Product Type: Equal Angle Steel & Unequal Angle Steel
Size Range: 25mm–200mm
Thickness Range: 3mm–18mm
Standard Length: 6m, 9m, 12m; customized length from 3m–15m, random cutting, punching and bending processing are available
Regular Stock Sizes: 25*25, 30*30, 40*40, 50*50, 63*63, 70*70, 80*80, 100*100, 125*125, 140*140, 160*160, 200*200mm; common unequal specifications such as 32*20, 40*25, 50*32, 63*40mm are fully in stock
Surface Quality: Smooth and flat surface, clear right angle, no cracks, scars, rust or distortion. Strict dimensional tolerance control ensures high assembly accuracy for construction and mechanical processing.
5. Mechanical Properties
Q195: Yield strength ≥195MPa, Tensile strength: 315–430MPa, high flexibility for light structural processing
Q235B: Yield strength ≥235MPa, Tensile strength: 370–500MPa, balanced plasticity, toughness and weldability, suitable for most conventional structures
Q355B: Yield strength ≥355MPa, Tensile strength: 470–630MPa, high load-bearing, impact resistance and deformation resistance for heavy-duty projects
45# Carbon Steel: Tensile strength ≥600MPa, high hardness and wear resistance for high-precision mechanical components
Galvanized angle steel completely retains the original mechanical properties of hot rolled steel. The zinc coating only provides anti-corrosion protection without affecting structural strength and processing performance.
6. Main Application Fields
1. Building Steel Structure: Factory frames, building keels, wall supports, roof trusses and embedded connecting parts. Hot rolled angle steel is the most widely used basic structural material.
2. Outdoor & Anti-corrosion Engineering: Municipal guardrails, power tower supports, communication equipment frames, coastal and humid environment structures.Galvanized angle steel is the preferred anti-rust structural material.
3. Mechanical Manufacturing: Equipment bases, mechanical supports, vehicle frames, ship auxiliary structures and industrial equipment accessories, whereunequal angle steel solves special asymmetric stress problems.
4. Infrastructure Engineering: Bridge auxiliary components, highway guardrails, railway facilities and stadium steel structures.
5. Hardware & Custom Processing: Shelf brackets, steel frame supports, welding assembly parts and non-standard structural steel customization.
7. Core Product Advantages
1. Complete Product System: Integrates hot rolled angle steel, galvanized angle steel and unequal angle steel with multiple materials and full specifications to realize one-stop procurement.
2. Stable Structural Performance: Adopts qualified raw materials and mature hot rolling technology with uniform texture, good toughness and strong compression resistance, not easy to deform or crack after long-term load bearing.
3. Excellent Machinability: Easy to cut, bend, weld and punch with high assembly accuracy, greatly improving construction and production efficiency.
4. Superior Anti-corrosion Performance: Galvanized angle steel features thick and uniform zinc layer, strong adhesion and long outdoor service life, reducing later maintenance costs.
5. Flexible Supply & High Cost Performance: Sufficient spot inventory, support various deep processing and customized specifications, stable delivery for small orders and bulk engineering orders.
8. Packaging, Transportation & Delivery Cycle
8.1 Packaging Method
All angle steel products are bundled firmly with steel strips, equipped with waterproof and moisture-proof outer packaging and end anti-collision protection. The package is dust-proof, rust-proof and compression-resistant, suitable for long-distance land transportation and ocean shipping. Custom shipping marks, labels and export packaging are available to ensure intact delivery ofhot rolled angle steel, galvanized angle steel and unequal angle steel.
8.2 Delivery Cycle
Standard In-stock Specifications: Conventional Q235Bhot rolled angle steel and common galvanized angle steel are in sufficient stock, shipped within 3–5 working days after payment confirmation.
Regular Custom Processing: Fixed-length cutting, punching, bending and surface treatment of conventional angle steel, delivery within 5–10 working days.
Special Custom Products: Q355 high-strength grade, 45# carbon steel, special unequal angle steel specifications and high-zinc-layer galvanized customization, delivery within 10–20 working days according to process complexity.
Large-batch Orders: Exclusive production schedule negotiation and phased shipment are supported to match project construction progress and ensure continuous material supply.
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