15-5PH / X5CrNiCuNb15-5 vs X2CrNiN18-7: 39% composition overlap. Significantly different materials serving different application areas.
15-5PH / X5CrNiCuNb15-5 vs X2CrNiN18-7
Side-by-side chemical composition and mechanical property comparison.
Overview
15-5PH / X5CrNiCuNb15-5
1.4545
Martensitic precipitation-hardening stainless steel. Similar to 17-4PH but with better transverse ductility and toughness due to lower delta ferrite. Used for aerospace structural components, nuclear reactor parts, food processing equipment, and high-performance fasteners.
X2CrNiN18-7
1.4318
Nitrogen-alloyed work-hardening austenitic — AISI 301LN. Lower Ni (6-8%) than 304 makes it metastable: cold work transforms austenite to martensite → UTS up to 1400 MPa in full-hard condition. N addition compensates low C for corrosion and strength. Used for rail car bodies, springs, structural parts requiring high strength-to-weight ratio, and architectural cladding.
| 15-5PH / X5CrNiCuNb15-5 | X2CrNiN18-7 | |
|---|---|---|
| Material Number | 1.4545 | 1.4318 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-2 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | X2CrNiN18-7 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–2% | OK |
| P | 0–0.03% | — | — |
Mechanical properties
| Property | 15-5PH / X5CrNiCuNb15-5 | X2CrNiN18-7 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 550–750 | MPa |
| yield_strength | ≥ 1170 | ≥ 250 | MPa |
| elongation | ≥ 10 | ≥ 40 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and X2CrNiN18-7 have significantly different compositions (39% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 15-5PH / X5CrNiCuNb15-5 the same as X2CrNiN18-7?
15-5PH / X5CrNiCuNb15-5 and X2CrNiN18-7 have a 39% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with X2CrNiN18-7?
Generally not recommended. The compositions differ significantly (39% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 15-5PH / X5CrNiCuNb15-5 and X2CrNiN18-7?
The main differences are in the following elements: Cr, Ni. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while X2CrNiN18-7 is a Stainless Steel grade.
Related Comparisons
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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.