15-5PH / X5CrNiCuNb15-5 vs X5CrNi18-10: 55% composition overlap. Moderate differences, generally not direct substitutes.
15-5PH / X5CrNiCuNb15-5 vs X5CrNi18-10
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.
X5CrNi18-10
1.4301
THE most widely used stainless steel worldwide — the original "18/8" austenitic (V2A). Good corrosion resistance in natural environments (water, humidity, weak acids). Non-magnetic when annealed. NOT resistant to intergranular corrosion after welding — use 1.4307 (304L) or 1.4541 (321) for welded service. PREN 17.5-21.1 — not suitable for chloride/seawater. Used everywhere: kitchen equipment, food processing, architecture, chemical tanks, automotive, medical devices.
| 15-5PH / X5CrNiCuNb15-5 | X5CrNi18-10 | |
|---|---|---|
| Material Number | 1.4545 | 1.4301 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-3 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | X5CrNi18-10 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.07% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–2% | OK |
| P | 0–0.03% | 0–0.045% | OK |
Mechanical properties
| Property | 15-5PH / X5CrNiCuNb15-5 | X5CrNi18-10 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 500–700 | MPa |
| yield_strength | ≥ 1170 | ≥ 190 | MPa |
| elongation | ≥ 10 | ≥ 45 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and X5CrNi18-10 have moderate differences (55% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 15-5PH / X5CrNiCuNb15-5 the same as X5CrNi18-10?
15-5PH / X5CrNiCuNb15-5 and X5CrNi18-10 have a 55% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with X5CrNi18-10?
Generally not recommended. The compositions differ significantly (55% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 15-5PH / X5CrNiCuNb15-5 and X5CrNi18-10?
The main differences are in the following elements: Cr, Ni. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while X5CrNi18-10 is a Stainless Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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