9SMnPb28 vs P355NL: 58% composition overlap. Moderate differences, generally not direct substitutes.
9SMnPb28 vs P355NL
Side-by-side chemical composition and mechanical property comparison.
Overview
9SMnPb28
1.0718
Leaded free-cutting steel — Pb (0.15-0.35%) + S (0.24-0.33%) for maximum machinability. THE ultimate Automatenstahl: machinability rating ~175% (vs 100% for 11SMn30). Pb acts as chip-breaker and tool lubricant. Used for high-speed automatic screw machine production of screws, nuts, fittings, bushings, and any part where surface finish and cycle time matter most. NOTE: Pb content being phased out under EU ELV/RoHS — replacement grades emerging.
P355NL
1.0566
Normalized pressure vessel steel with low-temperature toughness — ReH >=355 MPa, Charpy at -40°C (KV >=27J). "NL" = Normalized + Low-temperature. Used for pressure vessels, storage tanks, and process equipment operating in cold environments (LPG, cryogenic). EN 10028-3 + PED compliant.
| 9SMnPb28 | P355NL | |
|---|---|---|
| Material Number | 1.0718 | 1.0566 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10087 | EN 10028-3 |
Chemical composition (wt%)
| Element | 9SMnPb28 | P355NL | Overlap |
|---|---|---|---|
| C | 0–0.14% | 0–0.18% | OK |
| Si | — | 0–0.5% | — |
| Mn | 0.9–1.3% | 1–1.7% | Partial |
| P | 0–0.06% | — | — |
Mechanical properties
| Property | 9SMnPb28 | P355NL | Unit |
|---|---|---|---|
| tensile_strength | 370–500 | 490–630 | MPa |
| yield_strength | 230–300 | ≥ 355 | MPa |
| elongation | 14–22 | ≥ 20 | % |
Compatibility Assessment
9SMnPb28 and P355NL have moderate differences (58% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 9SMnPb28 the same as P355NL?
9SMnPb28 and P355NL have a 58% composition overlap. They are generally not directly interchangeable.
Can I replace 9SMnPb28 with P355NL?
Generally not recommended. The compositions differ significantly (58% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 9SMnPb28 and P355NL?
The main differences are in the following elements: Mn. 9SMnPb28 is a Carbon Steel grade, while P355NL 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.