S355J2+N Low-alloy High-strength Steel Plate

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional s355j2+n low-alloy high-strength steel plate manufacturers and suppliers in China. Welcome to wholesale customized s355j2+n low-alloy high-strength steel plate at competitive price from our factory. Good service and quality products are available.

 

S355J2+N steel plate is European standard low alloy structural steel. The letter 'S' in front of the grade indicates that the steel is a carbon structural steel, the '355' at the end means that the minimum yield strength at room temperature is 355MPa, the '2' indicates the requirement for -20°C impact, and the '+' at the end means that the minimum yield strength at room temperature is 355MPa. N' means that the delivery state of the steel plate is equivalent to normalized rolling but does not necessarily require normalizing. It is a way of naming steel grades in the standard.

 

S355J2+N steel plate has excellent tensile strength and impact resistance toughness, and S355J2+N steel plate has good processing performance and welding performance.

The S355J2+N steel plate should have a variety of high-quality properties and outstanding performance during use, thus gaining unanimous praise and recognition from the majority of users. With frequent use in the manufacturing industry and continuous optimization and upgrading by manufacturers, S355J2+N gradually Steel plate has also become one of the commonly used steel plate grades in China.

S355J2 steel plate has good toughness and welding performance, and is suitable for machinery and equipment manufacturing enterprises such as ships, steel structures, metallurgy, mining, engineering machinery, bridge machinery, power station equipment, lifting and transportation machinery, machinery manufacturing and other projects that bear higher loads.

 

 

• Grade Breakdown: S (Structural), 355 (N/mm² min yield), J2 (Impact grade), +N (Normalized/Normalized Rolled).
• Yield Strength: > 355 MPa (thickness < 16 mm), reducing slightly for thicker sections.
• Tensile Strength: 470 - 630 MPa.
• Impact Toughness: Guaranteed impact energy 27 J at -20°C (J2). Weldability: Good; deemed suitable for conventional welding methods without preheating.

S355J2+N low alloy steel chemical composition:

C	Si	Mn	P	S	C.E.
max 0.22	max 0.55	max 1.60	max 0.035	max 0.035	max 0.047

 

S355J2+N low alloy steel material mechanical properties:

Thickness (mm)	Yield Strength Rehmin (N / mm²)	Tensile Strength Rmmin (N / mm²)	Elongation A5 min(%)	Impact Values Charpy-V-Notch Longitudinal Average from 3 Speimens Thk.>10 < 150mm.
3	355-550	490-630	max 22	27 Joules at -20 C

 

 

The versatility of S355J2+N Low-Alloy High-Strength Steel Plate makes it widely used across industries.

 

Typical Applications

• Steel structures and buildings
• Bridges and infrastructure
• Offshore platforms
• Heavy machinery and equipment
• Shipbuilding and transportation

Application Insight

Its excellent toughness makes it ideal for cold climates and dynamic load conditions.

 

 

Understanding equivalent grades helps in global procurement.

 

International Equivalents

Standard	Grade
EN	S355J2+N
ASTM	A572 Gr.50 / A656 Gr.50
JIS	SM490
GB	Q345D

 

Equivalency Insight

While equivalent grades have similar strength levels, differences in chemical composition and impact requirements should be carefully evaluated.

 

Comparison Within EN 10025

Grade	Yield Strength	Impact Temp	Condition
S355JR	355 MPa	+20°C	As rolled
S355J0	355 MPa	0°C	As rolled
S355J2	355 MPa	-20°C	As rolled
S355J2+N	355 MPa	-20°C	Normalized

 

Key Differences

• S355J2+N offers better toughness and stability
• Normalization improves grain structure and consistency
• More suitable for critical structural applications

 

 

Processing Features

• Easy cutting and forming
• Suitable for cold and hot forming
• Good machinability

 

Welding Performance

• Excellent weldability with low carbon content
• Compatible with common welding methods
• Minimal risk of cracking

 

Practical Tip

Preheating may be required for thicker plates to ensure optimal welding quality.

 

 

 

What does +N mean in S355J2+N?

It means the steel is supplied in a normalized condition, improving mechanical properties and uniformity.

 

Is S355J2+N suitable for low temperatures?

Yes, it guarantees impact toughness at -20°C.

 

Can S355J2+N be welded easily?

Yes, its low carbon content ensures excellent weldability.

 

What industries commonly use S355J2+N?

Construction, offshore, machinery, and infrastructure industries.

 

How is it different from S355JR?

S355J2+N has better low-temperature performance and improved structural reliability.

 

What is the US equivalent of S355J2 N?

The closest US equivalent to European standard S355J2+N (EN 10025-2) is ASTM A572 Grade 50. S355J2+N is a structural steel with a minimum yield strength of 355 MPa and specified low-temperature impact toughness , matched by ASTM A572 Grade 50's similar high strength, structural, and weldable properties

 

What is the difference between S355J2 and S355J2 N?

 

Difference between both:
S355J2 +AR steel plate and S355J2+ N steel plate differ primarily by the delivery condition when supplying, with S355J2+AR steel plate being delivered As Rolled, and S355J2+N steel plate being delivered after normalizing heating treatment.

 

 

At GNEE, we deliver more than steel-we deliver reliability and performance.

 

Our Advantages

• Advanced production facilities and strict quality control
• Large inventory for fast delivery
• Custom sizes and processing services
• Global export experience
• Professional technical support

We help clients select the right material and ensure long-term performance in demanding applications.

 

 

S355J2+N Low-Alloy High-Strength Steel Plate is a reliable and versatile solution for structural applications requiring strength, toughness, and weldability. Its normalized condition and excellent low-temperature performance make it a preferred choice worldwide.

Request A Quote

 

If you are looking for a trusted supplier, GNEE STEEL is ready to support your project with high-quality products and competitive pricing. Contact us today to get expert advice and a fast quotation-send your inquiry now and secure the best solution for your steel needs!

 

GNEE Steel Warehousing (Inventory)

GNEE Steel has 7 major warehousing bases with a standing inventory of over 100,000 tons of steel products, covering more than 800 specifications, enabling quick order response and shorter lead times.

 

 

Packaging & Transportation

Equipped with a professional logistics team, we provide sea, land and air multimodal transport covering more than 160 countries worldwide, with full tracking and on-time delivery.

 

 

Inspection

We provide full-process quality inspection including UT/RT/MT/PT, tensile, hardness and chemical composition analysis, and support third-party certifications such as SGS, CE and ISO to ensure every batch meets standards.

 

 

Processing

We offer one-stop precision processing: laser/plasma cutting, bending, welding, drilling, surface treatment (galvanizing / anti-corrosion), with customized sizes and shapes as required.

 

GNEE Group Customer Visit

 

 

GNEE Group Steel Exhibitions

 

 

We support multi-specification, multi-brand weather resistant steel plate customization, if you have low carbon steel A36 or other corten steel plate product customization needs, please contact us!

 

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