Description

Technical Parameters

Product Overview

S355J2+N EN10025-2 Standard is manufactured with a normalized (+N) delivery condition in accordance with EN specifications. It offers a minimum yield strength of 355 MPa and reliable impact toughness at -20°C, delivering stable performance for structural applications requiring high strength, good weldability, and durability.

Standard: EN 10025-2
Grade: S355J2+N
Delivery Condition: Normalized (+N)

s355j2+n

Technical Specification

Element	S355N (EN 10025-3, Ladle, max %)	S355J2+N (EN 10025-2, max %)	Role in Properties
Carbon (C)	0.20	0.20	Similar, ensures weldability and toughness.
Silicon (Si)	0.50	0.55	S355J2+N's slightly higher Si aids deoxidation.
Manganese (Mn)	0.90-1.65	1.60	S355N's range supports fine-grain structure.
Phosphorus (P)	0.030	0.025	S355J2+N's lower P enhances toughness.
Sulfur (S)	0.025	0.025	Identical, ensures weld quality.
Nitrogen (N)	0.025	0.012	S355J2+N's lower N reduces brittleness.
Aluminum (Al)	0.020 (min, total)	-	S355N's Al refines grains for toughness.
Niobium (Nb)	0.05	-	S355N's Nb enhances fine-grain structure.
Vanadium (V)	0.10	-	S355N's V boosts strength.
Chromium (Cr)	0.30	0.30	Enhances strength and minor atmospheric corrosion resistance without compromising weldability.
Nickel (Ni)	0.50	0.30	S355N's higher Ni improves toughness.
Molybdenum (Mo)	0.10	-	S355N's Mo enhances strength.
Copper (Cu)	0.55	0.55	Improves atmospheric corrosion resistance and provides minor solid-solution strengthening.

Carbon Equivalent Value (CEV) & Weldability

S355J2+N (EN 10025-2): CEV ≤ 0.45% (≤ 40 mm). Standard C-Mn alloy with low P/N levels. Highly cost-effective with excellent standard weldability.

S355N (EN 10025-3): CEV ≤ 0.43% (≤ 63 mm). Fine-grain microalloyed (Nb, V, Al, Ni) for higher impact toughness in heavy sections.

S355N Vs S355J2+N Mechanical Properties Comparison

Property	S355N (EN 10025-3, ≤16 mm)	S355J2+N (EN 10025-2, ≤16 mm)
Yield Strength (min, MPa)	355	355
Tensile Strength (MPa)	470-630	470-630
Elongation (min, %)	22	22
Impact Toughness (min, J)	27 @ -20°C	27 @ -20°C
Hardness (Brinell)	150-190 (typical)	140-180 (typical)

Standard Specifications (Common Sizes)

Grade	Dimensions (mm) (Thickness×Width×Length)	Total Weight (Tons)	Description	Remarks
S355J2	8 * 1500–4020 * 6000–18800	88.168	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	10 * 1500–4020 * 6000–18800	166.044	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	20 * 1500–4020 * 6000–18800	162.544	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	30 * 1500–4020 * 6000–18800	92.648	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	40 * 1500–4020 * 6000–18800	198.035	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	50 * 1500–4020 * 6000–18800	231.889	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	60 * 1500–4020 * 6000–18800	261.689	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	70 * 1500–4020 * 6000–18800	366.621	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	80 * 1500–4020 * 6000–18800	296.261	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	90 * 1500–4020 * 6000–18800	692.689	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	100 * 1500–4020 * 6000–18800	662.786	Low Alloy Plate	Four-edge trimmed, guaranteed properties
S355J2	≥120* 1500–4020 * 6000–18800	382.762	Low Alloy Plate	Four-edge trimmed, guaranteed properties

Technical Performance

Complies strictly with EN 10025-2 standards, offering a certified minimum yield strength of 355 MPa for dependable structural load-bearing performance.

Features guaranteed impact energy absorption of at least 27 Joules at -20°C, providing structural reliability in cold-climate and low-temperature operating environments.

Delivered in Normalized or Normalized Rolled (+N) condition per EN 10025-2, ensuring a homogeneous fine-grained microstructure and stable impact properties across all thickness ranges.

Formulated with a controlled Carbon Equivalent Value (CEV) to facilitate straightforward field welding and reduce the risk of cold cracking during fabrication.

Offers predictable cold forming and bending properties, helping downstream manufacturers minimize tooling wear and process errors.

Processing & Customization

Processing & NDT Options Available Capability / Standard Application Benefit

Precision Cutting Oxy-fuel, Plasma, Laser (Tolerance per drawings) Ready for immediate assembly & welding

Surface Preparation Shot blasting to Sa 2.5 + Weldable Shop Primer Prevents flash rust during ocean shipping

Ultrasonic Testing (UT) EN 10160 Classes S1/E1, S2/E2, S3/E3 Ensures internal soundness for heavy structures

Dimensional Tolerances & Delivery Standards

Thickness Tolerance: Complies strictly with EN 10029 Class B (controlled under-tolerance) or Class C (zero under-tolerance) upon request.

Flatness Tolerance: Standard flatness per EN 10029 Class N; precision leveling available up to Class S for laser cutting requirements.

Surface Condition: Shot-blasted and inspected per EN 10163-2 Class A Subclass 1 to guarantee crack-free surface quality.

Application & Project References

Heavy Construction & Infrastructure: Structural bridge components, crane booms, and high-rise building frameworks.

Offshore & Marine Engineering: Non-pressurized structural parts for offshore platforms and port machinery operating in sub-zero conditions.

Mining & Heavy Machinery: Excavator chassis, dump truck bodies, and industrial press frames requiring consistent yield strength.

Factory Capability & Traceability

Production Line: 4100mm heavy plate rolling line equipped with continuous normalizing furnaces.

Full Heat Traceability: Every plate is hard-stamped and ink-stenciled with Heat Number, Batch Number, Grade, and Standard.

In-House Testing Laboratory: ISO/IEC 17025 accredited laboratory equipped with Optical Emission Spectrometers, Universal Tensile Testers, and Charpy Impact Testing Equipment.

Third-Party Inspection & Compliance

Third-Party Testing (EN 10204 3.2): Full support for client-appointed third-party inspections including SGS, TUV Rheinland, Bureau Veritas (BV), Lloyd's Register (LR), and DNV.

Export Packaging: Anti-rust oil coating, edge protectors, waterproof plastic wrapping, and heavy-duty steel strapping for ocean freight protection.

Quality Documentation & Pre-Shipment Proof

Authentic Documentation: Sample EN 10204 3.1 Mill Test Certificates (MTC) available upon request for quality audit before order placement.

Pre-Shipment Inspection Records: Dimensional measurement verification, surface condition photos, and loading inspection videos provided for every export order.

s355j2+n mtc

FAQ

Q: What is your typical lead time for stock vs. custom mill production?

A: Stock plates are ready for container loading within 7 to 10 days, while custom rolling orders typically require 20 to 30 days depending on the mill schedule.

Q: Can you provide sample Mill Test Certificates (MTC) prior to placing an order?

A: Yes, we provide anonymized EN 10204 3.1 MTCs from previous production heats so your quality control team can review chemical and mechanical compliance beforehand.

Q: How do you handle ocean freight protection against rust and transit damage?

A: All shipments receive a light anti-rust oil coating, edge protection, waterproof plastic wrapping, and steel strapping, along with optional desiccant bags for sea container transport.

Q: What payment terms and trade methods do you accept for international buyers?

A: We offer standard B2B trade terms including FOB, CFR, and CIF, with flexible payment methods such as T/T and Irrevocable At-Sight L/C.

Q: How are quality claims resolved if the delivered material fails specification?

A: If a material discrepancy is verified by a recognized third-party inspector (e.g., SGS or TÜV) within 30 days of arrival, we process a direct replacement or financial credit per contract terms.

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