P355NL2 vs S355M: 67% composition overlap. Moderate differences, generally not direct substitutes.
P355NL2 vs S355M
Side-by-side chemical composition and mechanical property comparison.
Overview
P355NL2
1.1106
Weldable fine-grained non-alloy steel for pressure vessels with minimum yield strength 355 MPa and impact testing at -50°C (NL2 designation). The most stringent low-temperature variant of the P355 series with tightest P and S control. Used for cryogenic storage vessels, LNG tanks, and pressure equipment in extreme cold service. Commonly stocked by European plate distributors.
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.
| P355NL2 | S355M | |
|---|---|---|
| Material Number | 1.1106 | 1.8823 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10028-3 | EN 10025-4 |
Chemical composition (wt%)
| Element | P355NL2 | S355M | Overlap |
|---|---|---|---|
| C | ≤ 0.18% | ≤ 0.16% | OK |
| Si | ≤ 0.5% | ≤ 0.55% | OK |
| Mn | 1.1–1.7% | ≤ 1.6% | Partial |
| P | ≤ 0.02% | ≤ 0.035% | OK |
Mechanical properties
| Property | P355NL2 | S355M | Unit |
|---|---|---|---|
| tensile_strength | 490–630 | 450–610 | MPa |
| yield_strength | ≥ 355 | ≥ 355 | MPa |
| elongation | ≥ 22 | ≥ 22 | % |
Compatibility Assessment
P355NL2 and S355M have moderate differences (67% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is P355NL2 the same as S355M?
P355NL2 and S355M have a 67% composition overlap. They are generally not directly interchangeable.
Can I replace P355NL2 with S355M?
Generally not recommended. The compositions differ significantly (67% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between P355NL2 and S355M?
The main differences are in the following elements: Mn. P355NL2 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.