When it comes to high-strength structural steel, choosing the right grade is critical for project safety and longevity. Many engineers and procurement managers often ask if S355J2+N steel plate equivalent to S355N steel plate is the right choice for their specific industrial applications.
As a leading professional steel plate manufacturer and supplier with over 15 years of experience, GNEE specializes in providing premium carbon steel plates that meet international standards.
Our S355J2+N steel plate products are widely used in bridge construction, offshore platforms, and heavy machinery, ensuring that your projects stand the test of time and environmental stress.
Understanding S355J2+N Steel Plate and Its S355N Equivalent
The S355 grade is the backbone of modern structural engineering, governed by the European standard EN 10025. However, the suffixes "+N" and "N" represent different delivery conditions and grain structures. S355J2+N steel plate belongs to EN 10025-2 (non-alloy structural steels), where "+N" indicates it has been normalized or normalized rolled. On the other hand, S355N steel plate falls under EN 10025-3 (weldable fine-grain structural steels).
While many consider S355J2+N steel plate equivalent to S355N steel plate, they are not identical. S355J2+N is a high-quality non-alloy steel with a guaranteed impact energy of 27J at -20°C. S355N is a fine-grain steel, which generally offers better weldability and higher toughness in cold environments.
At GNEE, we help customers navigate these technical nuances to find the most cost-effective solution without compromising on structural integrity.
Premium S355J2+N steel plate inventory ready for global shipment at the GNEE factory.
Chemical Composition of S355J2+N vs. S355N Steel
The primary reason why S355J2+N steel plate equivalent to S355N is a common topic is their similar carbon manganese base. However, the "fine-grain" nature of S355N means it has stricter limits on elements like Nitrogen and may include micro-alloying elements like Niobium or Vanadium.
For most standard structural applications, the S355J2+N steel plate provided by GNEE offers the perfect balance. It features low carbon content to ensure excellent weldability and sufficient Manganese to provide the required yield strength. Our factory utilizes advanced smelting technologies to control impurities like Phosphorus and Sulfur, ensuring that every plate meets or exceeds the EN 10025-2 requirements.
Technical Parameter Table: S355J2+N vs. S355N
| Chemical Element (%) | S355J2+N (EN 10025-2) | S355N (EN 10025-3) |
| Carbon (C) max | 0.20 - 0.22 | 0.20 |
| Manganese (Mn) | 1.60 max | 0.90 - 1.65 |
| Silicon (Si) max | 0.55 | 0.50 |
| Phosphorus (P) max | 0.025 | 0.030 |
| Sulfur (S) max | 0.025 | 0.025 |
| Yield Strength (MPa) | ≥ 355 | ≥ 355 |
| Tensile Strength (MPa) | 470 - 630 | 470 - 630 |
| Impact Test | 27J at -20°C | 40J at -20°C |
Mechanical Property Analysis: Is S355J2+N Equivalent to S355N?
In terms of pure strength, both grades share a minimum yield strength of 355 MPa (for thicknesses ≤ 16mm), which is why S355J2+N steel plate equivalent to S355N is a frequent substitution in general construction. The "J2" in S355J2+N signifies its toughness at -20°C.
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Mechanical Properties: |
Thickness |
Yield strength |
Tensile strength |
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|
Mpa Min. |
Mpa |
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EN 10025-3 |
S355N |
T≤16 |
355 |
470-630 |
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EN 10025-2 |
S355J2 N |
T≤16 |
355 |
470-630 |
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S355N, being a fine-grain steel, is often preferred for more complex welded structures where the Risk of brittle fracture must be minimized. However, the S355J2+N steel plate is more readily available and offers a more economical price point for 90% of structural steel requirements.
GNEE ensures that all our normalized plates undergo rigorous ultrasonic testing (UT) and mechanical property verification to guarantee they perform reliably under heavy loads.
GNEE quality control team verifying the thickness and surface quality of S355J2+N steel plates.
Why Choose GNEE as Your S355J2+N Steel Plate Supplier?
As a premier manufacturer, GNEE is more than just a trader. We operate a massive production facility equipped with the latest rolling mills and heat treatment furnaces. When you source S355J2+N steel plate equivalent to S355N from us, you benefit from:
- Strict Quality Control: Every plate comes with an original MTC (Mill Test Certificate) according to EN 10204 3.1 or 3.2.
- Customized Sizes: We can provide thicknesses ranging from 6mm to 300mm and widths up to 4000mm.
- Global Logistics: Our export team handles everything from specialized packaging to sea freight, ensuring your S355J2+N steel plate arrives on time and in perfect condition.
- Expert Consultation: Not sure if you should use S355J2+N or S355N? Our engineers provide free technical consultations to help you optimize your material costs.
Processing and Customization Services for S355N Equivalent Plates
At GNEE, we understand that every project has unique requirements. Beyond supplying the raw S355J2+N steel plate equivalent to S355N, we offer a full suite of value-added processing services. This allows our clients to receive "ready-to-use" components, significantly reducing their on-site labor costs.
Our workshop is equipped with CNC flame cutting, plasma cutting, and laser cutting machines. Whether you need complex shapes, beveling for welding, or hole drilling, we can process your S355J2+N steel plate to your exact CAD drawings. Furthermore, we provide sandblasting and painting services to protect your steel against corrosion during transit and storage.
Professional packaging and loading of S355J2+N steel plates for international delivery.
Conclusion: Order Your S355J2+N Steel Plate from GNEE Today
In summary, while there are technical differences in grain structure and impact energy between the two, the S355J2+N steel plate equivalent to S355N remains the most versatile and widely used structural steel grade in the global market. Its excellent strength-to-weight ratio and superior weldability make it the top choice for modern infrastructure.
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What is the difference between S355N and S355J2 N?
S355N (EN 10025-3) is a low-alloy, normalized steel with microalloying for enhanced toughness in high-load applications like bridges and cranes, while S355J2+N (EN 10025-2) is a non-alloy, normalized steel for cost-effective general construction.
What is equivalent to S355J2 N steel?
S355J2+N (EN 10025-2) is a structural steel commonly equated to ASTM A572 Grade 50 in the US, DIN St52-3N in Germany, and Q355D/Q345D in China. It is a normalized, high-strength (355 MPa yield) steel with guaranteed impact toughness at -20°C, often used in bridges, heavy machinery, and offshore structures.
What is equivalent to S355 plate?
S355 Equivalent Plate Grade
ASTM has identified A572-50 as an acceptable substitution for S355. Both grades have similar chemical compositions and are high-strength, low-alloy structural steels.
What is the yield of S355J2 N?
EN10025 S355J2+N has the higher Tensile of 510 N/mm to 680 N/mm and a Yield of 355 N/mm , depending upon thickness. The higher strength together with the similar weldability and cutting properties make it an ideal alternative to S275JR when weight savings of up to 30% can be achieved.
What is the difference between S355NL and S355J2 N?
EN10025 S355NL combines the higher Yield and Tensile properties of S355J2+N, but with additional Impact properties at -50 Deg C. This enables the steel to keep its characteristics at extremely cold locations such as the arctic or offshore applications.
What is the difference between S355J2 N and S355J2 AR?
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.
What is the difference between S355J2 and S355NL?
S355J2: Requires preheating for thick sections (>30 mm). S355NL: Better weldability due to fine grain and low impurities; suitable for critical welds without extensive preheating. Choose S355J2 for cost-effective, general-purpose structures in moderate climates.
What is the difference between S355J2 N and S355J2G3?
S355J2G3 is a non alloy structural steel with good weldability and mechanical properties, commonly used in the manufacture of components, mechanical parts, and equipment. In contrast, S355J2+N (EN 1.0577) is a product obtained by normalizing S355J2 steel, which has higher strength and toughness.
