S355J2+N vs S355M: 93% composition overlap. Very similar materials, likely interchangeable for most applications.
S355J2+N vs S355M
Side-by-side chemical composition and mechanical property comparison.
Overview
S355J2+N
1.0577
Normalized structural steel with 355 MPa minimum yield strength and J2 impact toughness (27J at -20°C). The normalized delivery condition (+N) ensures refined grain structure and uniform properties throughout the cross-section. Required for EN 1090 execution classes EXC3/EXC4 in structural steelwork. The standard choice for bridges, high-rise frames, crane runways, and wind tower sections where both strength and guaranteed low-temperature toughness are needed. Weldable with CEV typically <0.45.
S355M
1.8823
Thermomechanically rolled weldable fine-grained structural steel with minimum yield strength 355 MPa. The most widely used TMCP structural steel grade. M designation indicates thermo-mechanical control process delivery. Excellent weldability with low carbon equivalent, eliminating preheating in most cases. Used for bridges, offshore structures, cranes, heavy machinery, wind turbine foundations, and structural hollow sections.
| S355J2+N | S355M | |
|---|---|---|
| Material Number | 1.0577 | 1.8823 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10025-2 | EN 10025-4 |
Chemical composition (wt%)
| Element | S355J2+N | S355M | Overlap |
|---|---|---|---|
| C | ≤ 0.2% | ≤ 0.16% | OK |
| Si | ≤ 0.55% | ≤ 0.55% | OK |
| Mn | ≤ 1.6% | ≤ 1.6% | OK |
| P | ≤ 0.03% | ≤ 0.035% | OK |
Mechanical properties
| Property | S355J2+N | S355M | Unit |
|---|---|---|---|
| tensile_strength | 470–630 | 450–610 | MPa |
| yield_strength | ≥ 355 | ≥ 355 | MPa |
| elongation | ≥ 22 | ≥ 22 | % |
Compatibility Assessment
S355J2+N and S355M have very similar compositions (93% overlap) and are likely interchangeable for most applications. Verify mechanical properties for your specific use case.
Automated assessment based on composition analysis
Frequently Asked Questions
Is S355J2+N the same as S355M?
S355J2+N and S355M have a 93% composition overlap. For most purposes, they can be considered similar.
Can I replace S355J2+N with S355M?
In many cases, yes. The compositions overlap significantly (93%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between S355J2+N and S355M?
The main differences are in the following elements: overall alloying content. S355J2+N is a Carbon Steel grade, while S355M is a Carbon Steel grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.