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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
- Details
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Standard And Material Specification
Standard: EN 10210
A European standard specifying the technical delivery conditions for hot-finished hollow structural sections (HSS) made of non-alloy and fine-grain steels.Grade: S355J2H
S355: Indicates minimum yield strength of 355 MPa at room temperature.J2: Charpy V-notch impact toughness requirement at -20°C (27 Joules minimum).
H: Denotes hot-finished production (as opposed to cold-formed).
Chemical PropertiesSteel Grade C Maximum Mn Maximum Si Maximum P Maximum S Maximum N Maximum S235JRH 0.17 1.40 – 0.040 0.040 0.009 S355J0H 0.22 1.60 0.55 0.035 0.035 0.009 S275J2H 0.20 1.50 – 0.030 0.030 – S355J2H 0.22 1.60 0.55 0.030 0.030 – S275J0H 0.20 1.50 – 0.035 0.035 0.009 S355K2H 0.22 1.60 0.55 0.030 0.030 – Carbon (C) – Enhances hardness and strength but reduces ductility and weldability (controlled to ≤0.22% for balance).
Silicon (Si) – Improves strength and deoxidation during steelmaking (limited to ≤0.55% to avoid brittleness).
Manganese (Mn) – Increases strength and hardenability while improving hot workability (≤1.6%).
Phosphorus (P) & Sulfur (S) – Harmful impurities (≤0.030% each); reduce toughness and promote cracking.
Key Impact: Elements are balanced to achieve optimal mechanical properties (strength, weldability, impact resistance) for structural applications.
Mechanical Properties
EN 10210
Mechanical Strength Impact Energy Yield Strength
(WT≤16mm)
Elongation (%)
(WT≤40mm)
Tensile Strength
(WT≤3mm)
Test Temperature in celsius -20 0 20 S355J2H 355 22 510-680 27 – – S275J0H 275 23 430-580 – 27 – S275J2H 275 23 430-580 27 – – S235JRH 235 26 360-510 – – 27 S355J0H 355 22 510-680 – 27 – S355K2H 355 22 510-680 40 – – Yield Strength (≥355 MPa) – Indicates the stress at which permanent deformation begins; ensures structural stability under load.
Tensile Strength (510–680 MPa) – Measures maximum stress before failure; guarantees resistance to breaking under tension.
Elongation (≥22%) – Reflects ductility; higher values mean better formability and crack resistance.
Charpy Impact (≥27 J at -20°C) – Evaluates toughness in cold environments; critical for shock/fracture resistance.
Key Impact: These properties ensure the pipe can withstand heavy loads, dynamic forces, and low temperatures without failure.
Manufacturing Process
Raw Material Preparation: High-quality steel slabs or billets with the specified chemical composition for S355J2H are selected.Heating: The steel is heated to around 1100–1200°C to make it ductile for shaping.
Rolling: The heated steel is rolled through specialized mills to form the rectangular hollow sections, ensuring precise dimensions and uniform wall thickness.
Cooling and Straightening: The pipe is cooled gradually to avoid internal stresses and then straightened if necessary.
Inspection and Testing: The finished pipe undergoes dimensional checks, non-destructive testing (e.g., ultrasonic), and mechanical property tests to ensure compliance with EN 10210 standards.
Surface Treatment (Optional): The pipe may be painted or galvanized to enhance corrosion resistance.
Packaging and Storage: The pipes are packaged and stored for shipment.
Applications
Structural Engineering: Building frames, bridges, and offshore platforms.Mechanical Components: Heavy machinery, load-bearing parts.
Infrastructure: Pipelines, support columns, and crane booms.
Advantages
High Strength-to-Weight Ratio: Suitable for heavy-load applications.Good Weldability: Preheating may be required for thick sections.
Impact Resistance: Reliable performance in low-temperature environments.
In summary, EN 10210 S355J2H is a high-strength carbon steel pipe offering excellent mechanical properties and impact resistance. Its hot-finished production ensures superior quality for structural applications in construction, machinery, and infrastructure. With certified performance and cost efficiency, it's a reliable choice for demanding engineering projects.
EN 10210 S355J2H Carbon Steel Pipe
Subcategory
Keyword
- Details
-
Standard And Material Specification
Standard: EN 10210
A European standard specifying the technical delivery conditions for hot-finished hollow structural sections (HSS) made of non-alloy and fine-grain steels.Grade: S355J2H
S355: Indicates minimum yield strength of 355 MPa at room temperature.J2: Charpy V-notch impact toughness requirement at -20°C (27 Joules minimum).
H: Denotes hot-finished production (as opposed to cold-formed).
Chemical PropertiesSteel Grade C Maximum Mn Maximum Si Maximum P Maximum S Maximum N Maximum S235JRH 0.17 1.40 – 0.040 0.040 0.009 S355J0H 0.22 1.60 0.55 0.035 0.035 0.009 S275J2H 0.20 1.50 – 0.030 0.030 – S355J2H 0.22 1.60 0.55 0.030 0.030 – S275J0H 0.20 1.50 – 0.035 0.035 0.009 S355K2H 0.22 1.60 0.55 0.030 0.030 – Carbon (C) – Enhances hardness and strength but reduces ductility and weldability (controlled to ≤0.22% for balance).
Silicon (Si) – Improves strength and deoxidation during steelmaking (limited to ≤0.55% to avoid brittleness).
Manganese (Mn) – Increases strength and hardenability while improving hot workability (≤1.6%).
Phosphorus (P) & Sulfur (S) – Harmful impurities (≤0.030% each); reduce toughness and promote cracking.
Key Impact: Elements are balanced to achieve optimal mechanical properties (strength, weldability, impact resistance) for structural applications.
Mechanical Properties
EN 10210
Mechanical Strength Impact Energy Yield Strength
(WT≤16mm)
Elongation (%)
(WT≤40mm)
Tensile Strength
(WT≤3mm)
Test Temperature in celsius -20 0 20 S355J2H 355 22 510-680 27 – – S275J0H 275 23 430-580 – 27 – S275J2H 275 23 430-580 27 – – S235JRH 235 26 360-510 – – 27 S355J0H 355 22 510-680 – 27 – S355K2H 355 22 510-680 40 – – Yield Strength (≥355 MPa) – Indicates the stress at which permanent deformation begins; ensures structural stability under load.
Tensile Strength (510–680 MPa) – Measures maximum stress before failure; guarantees resistance to breaking under tension.
Elongation (≥22%) – Reflects ductility; higher values mean better formability and crack resistance.
Charpy Impact (≥27 J at -20°C) – Evaluates toughness in cold environments; critical for shock/fracture resistance.
Key Impact: These properties ensure the pipe can withstand heavy loads, dynamic forces, and low temperatures without failure.
Manufacturing Process
Raw Material Preparation: High-quality steel slabs or billets with the specified chemical composition for S355J2H are selected.Heating: The steel is heated to around 1100–1200°C to make it ductile for shaping.
Rolling: The heated steel is rolled through specialized mills to form the rectangular hollow sections, ensuring precise dimensions and uniform wall thickness.
Cooling and Straightening: The pipe is cooled gradually to avoid internal stresses and then straightened if necessary.
Inspection and Testing: The finished pipe undergoes dimensional checks, non-destructive testing (e.g., ultrasonic), and mechanical property tests to ensure compliance with EN 10210 standards.
Surface Treatment (Optional): The pipe may be painted or galvanized to enhance corrosion resistance.
Packaging and Storage: The pipes are packaged and stored for shipment.
Applications
Structural Engineering: Building frames, bridges, and offshore platforms.Mechanical Components: Heavy machinery, load-bearing parts.
Infrastructure: Pipelines, support columns, and crane booms.
Advantages
High Strength-to-Weight Ratio: Suitable for heavy-load applications.Good Weldability: Preheating may be required for thick sections.
Impact Resistance: Reliable performance in low-temperature environments.
In summary, EN 10210 S355J2H is a high-strength carbon steel pipe offering excellent mechanical properties and impact resistance. Its hot-finished production ensures superior quality for structural applications in construction, machinery, and infrastructure. With certified performance and cost efficiency, it's a reliable choice for demanding engineering projects.
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Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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