Customized En 10025 S235jr S355jr S355j2 Steel Bar Steel Angles

Customized EN 10025 S235JR S355JR S355J2 Steel Bar & Steel Angles are high‑performance structural steel products engineered to meet the stringent requirements of the European standard EN 10025‑2. Available in a full spectrum of standard and custom dimensions, these angle bars feature a classic L‑shaped profile (equal‑leg or unequal‑leg) and are manufactured from three premium non‑alloy and low‑alloy structural steel grades: S235JR, S355JR, and S355J2. Delivering exceptional load‑bearing capacity, toughness, and workability, they serve as critical load‑transfer and connection components in construction, mechanical engineering, and infrastructure projects worldwide, while fully supporting customized design specifications to meet diverse project needs.

Core Material Properties & Grade Comparisons

The superior mechanical performance of these steel angles is rooted in their compliance with EN 10025‑2, where each grade offers distinct advantages for different load scenarios.

1. S235JR – General‑Purpose Structural Steel

S235JR is a cost‑effective, non‑alloy structural steel grade suitable for medium‑to‑low load applications. Its chemical composition is strictly controlled:

Carbon (C): ≤ 0.17%

Manganese (Mn): 0.30% – 0.60%

Phosphorus (P) & Sulfur (S): ≤ 0.035% each

This composition delivers balanced mechanical properties:

Minimum Yield Strength (Re): 235 MPa (for thicknesses ≤ 16 mm)

Tensile Strength (Rm): 360 – 510 MPa

Minimum Elongation (A): 23% (for thicknesses ≤ 40 mm)

The "JR" designation guarantees notch impact toughness of at least 27 J at 20°C, ensuring reliable performance under static loads and moderate dynamic conditions. S235JR is ideal for general building frames, roof trusses, scaffolding, and light‑to‑medium duty supports.

2. S355JR – Medium‑High Strength Structural Steel

S355JR is a low‑alloy structural steel grade with enhanced load‑bearing capacity, serving as a workhorse for medium‑to‑heavy load applications. Its chemical composition is optimized for strength and toughness:

Carbon (C): ≤ 0.21%

Manganese (Mn): 1.00% – 1.50%

Phosphorus (P) & Sulfur (S): ≤ 0.035% each

Key mechanical properties include:

Minimum Yield Strength (Re): 355 MPa (for thicknesses ≤ 16 mm)

Tensile Strength (Rm): 470 – 630 MPa

Minimum Elongation (A): 21% (for thicknesses ≤ 40 mm)

With "JR" impact toughness (≥27 J at 20°C), S355JR offers approximately 50% higher yield strength than S235JR, making it suitable for bridge bracing, transmission towers, heavy machinery supports, and large‑span building frameworks.

3. S355J2 – High‑Toughness Critical Structure Steel

S355J2 is a high‑performance grade designed for critical structural applications requiring superior toughness and reliability under harsh conditions. It shares the same base strength as S355JR but with significantly improved low‑temperature impact resistance:

Chemical Composition: Similar to S355JR, with tight controls on impurities to enhance toughness.

Mechanical Properties:

Minimum Yield Strength (Re): 355 MPa (for thicknesses ≤ 16 mm)

Tensile Strength (Rm): 470 – 630 MPa

Minimum Elongation (A): 21% (for thicknesses ≤ 40 mm)

The critical difference is the "J2" designation, which guarantees notch impact toughness of ≥ 27 J at ‑20°C. This makes S355J2 indispensable for cold‑climate projects, offshore platforms, seismic‑resistant structures, and other high‑risk applications where structural integrity under extreme loads is non‑negotiable.

Structural Design & Dimensional Advantages

The L‑shaped (angle) profile is the core geometry of these steel bars, engineered for efficient load distribution and easy assembly.

1. Equal‑Leg vs. Unequal‑Leg Configurations

Equal‑Leg Angles: Feature symmetrical leg lengths (e.g., 50×50 mm, 100×100 mm) with uniform wall thickness. They provide balanced load transmission across two perpendicular planes, ideal for symmetrical frame connections, vertical supports, and roof trusses.

Unequal‑Leg Angles: Have two different leg lengths (e.g., 75×50 mm, 120×80 mm), enabling flexible force adaptation for irregular joints, wall brackets, beam supports, and asymmetric load scenarios.

2. Customized Dimensional Flexibility

While adhering to EN 10025‑2 and EN 10056 (dimensional tolerances for hot‑rolled steel sections), these angles are fully customizable to meet project‑specific needs:

Leg Lengths: Ranging from 20 mm to 200 mm (standard) or custom‑cut to unique lengths.

Wall Thicknesses: 3 mm to 25 mm, tailored to load requirements.

Total Lengths: 6 m, 9 m, 12 m (standard) or custom lengths for bulk orders.

Tolerances: Strictly comply with EN 10056, ensuring precise right‑angle profiles and uniform thickness for seamless integration with other EN/ASTM structural components.

Manufacturing & Workability

1. Hot‑Rolled Production Process

Customized EN 10025 steel angles are manufactured via advanced hot‑rolling technology:

Steel billets are heated to 1100–1200°C to soften the material.

Precision rolling forms the L‑shaped profile, refining the internal grain structure to eliminate pores, inclusions, and microcracks.

Controlled cooling ensures consistent mechanical properties (strength, toughness, ductility) throughout the bar length.

This process delivers a product with smooth surface finish, uniform density, and dimensional accuracy, reducing the need for additional pre‑processing before installation.

2. Superior Workability

All three grades exhibit excellent fabricability, a key advantage for on‑site customization:

Weldability: Low carbon equivalent (CEV ≤ 0.45 for S235JR/S355JR) ensures easy fusion welding via arc, MIG, or TIG methods, with minimal risk of brittle cracking in the heat‑affected zone (HAZ). Pre‑heating is rarely required for most sections.

Machinability: Can be easily cut, drilled, bent, and punched using conventional industrial equipment, adapting to complex project designs without compromising structural integrity.

Formability: The ductile nature of S235JR/S355JR/S355J2 allows for cold bending and shaping, making it suitable for curved supports, custom brackets, and decorative structural elements.

Key Applications

Thanks to their multi‑grade versatility and customizable design, these steel angles are widely used across industries:

1. Construction Engineering

Residential/Commercial Buildings: Building frames, floor joists, balcony railings, and scaffolding.

Infrastructure: Bridge bracing, road guardrails, drainage system supports, and transmission tower legs.

Civil Engineering: Temporary formwork, concrete reinforcement, and pipeline fixing brackets.

2. Industrial Manufacturing

Heavy Machinery: Equipment bases, machine supports, and conveyor system brackets.

Warehousing/Logistics: Shelf frames, cargo pallets, and storage racking.

Offshore/Marine: Offshore platform supports and marine infrastructure (with galvanized coating).

3. Critical & Low‑Temperature Projects

S355J2 is specifically deployed in seismic‑resistant structures, cold‑region buildings, and offshore wind farms, where reliable toughness at sub‑zero temperatures is essential.

Quality Assurance & Surface Treatment

1. Strict Quality Control

Each batch of Customized EN 10025 S235JR/S355JR/S355J2 Steel Angles undergoes comprehensive inspections to ensure compliance:

Chemical Composition Analysis: Verifies C, Mn, P, S, and other elements meet EN 10025‑2 standards.

Mechanical Testing: Yield strength, tensile strength, elongation, and impact toughness (per EN 10045).

Dimensional Inspection: Leg length, thickness, right‑angle deviation, and straightness (per EN 10056).

Mill Test Certificate (MTC): Provided in EN 10204 3.1 or 3.2 format, confirming traceability and quality for critical applications.

2. Corrosion Resistance Enhancement

For outdoor or humid environments, the surface can be further treated:

Hot‑Dip Galvanizing: Forms a dense zinc layer (≥85 μm thickness), extending service life by 15–30 years in corrosive atmospheres.

Painting/Shot Blasting: Improves adhesion for protective coatings, ideal for architectural and decorative applications.

Electro‑Galvanizing: Delivers a smooth, uniform finish for aesthetic and light‑duty outdoor use.

Conclusion

Customized EN 10025 S235JR S355JR S355J2 Steel Bar & Steel Angles combine internationally recognized material performance, flexible dimensional customization, and excellent workability. Whether for general construction, heavy‑duty industrial supports, or critical low‑temperature projects, these products deliver reliable, cost‑effective, and durable solutions for modern engineering systems worldwide. As a trusted structural component, they embody the perfect balance of strength, toughness, and adaptability to meet the evolving demands of global infrastructure and manufacturing.