P275NH vs S550MC: 66% composition overlap. Moderate differences, generally not direct substitutes.
P275NH vs S550MC
Side-by-side chemical composition and mechanical property comparison.
Overview
P275NH
1.0487
Weldable fine-grained non-alloy steel for pressure vessels with minimum yield strength 275 MPa. NH designation indicates normalized condition with impact testing at -20°C. Widely used entry-level pressure vessel grade for boilers, storage tanks, heat exchangers, and pipes transporting hot liquids. Good weldability without preheating for most thicknesses.
S550MC
1.0986
High yield strength thermomechanically rolled steel for cold forming with minimum yield strength 550 MPa. The highest alloy quality grade in EN 10149-2 (grades above 550 are alloy special steels). Fine-grained microstructure provides excellent cold bending, folding, and flanging properties. Used for automotive chassis components, crane booms, trailer frames, agricultural machinery, and structural cold-formed sections.
| P275NH | S550MC | |
|---|---|---|
| Material Number | 1.0487 | 1.0986 |
| Category | Carbon Steel | Carbon Steel |
| Standard | EN 10028-3 | EN 10149-2 |
Chemical composition (wt%) — Pro
| Element | P275NH | S550MC | Overlap |
|---|---|---|---|
| C | ≤ 0.16% | ≤ 0.1% | OK |
| Si | ≤ 0.4% | ≤ 0.5% | OK |
| Mn | 0.8–1.5% | ≤ 1.8% | OK |
| P | ≤ 0.025% | ≤ 0.025% | OK |
| S | |||
| Cr | |||
| Mo | |||
| Ni | |||
| V | |||
| Ti | |||
| Nb |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | P275NH | S550MC | Unit |
|---|---|---|---|
| Tensile Strength | 370–510 | 600–760 | MPa |
| Yield Strength | ≥ 275 | ≥ 550 | MPa |
| Elongation | ≥ 24 | ≥ 14 | % |
| impact_kv | |||
| Density | |||
| Elastic Modulus |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
P275NH and S550MC have moderate differences (66% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is P275NH the same as S550MC?
P275NH and S550MC have a 66% composition overlap. They are generally not directly interchangeable.
Can I replace P275NH with S550MC?
Generally not recommended. The compositions differ significantly (66% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between P275NH and S550MC?
The main differences are in the following elements: overall alloying content. P275NH is a Carbon Steel grade, while S550MC 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.