15-5PH / X5CrNiCuNb15-5 vs 304 / X5CrNi18-10: 55% composition overlap. Moderate differences, generally not direct substitutes.
15-5PH / X5CrNiCuNb15-5 vs 304 / 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.
304 / X5CrNi18-10
1.4301
The world's most widely used stainless steel — the original 18/8 austenitic. Good corrosion resistance in atmospheric, organic, and inorganic environments. Excellent formability and weldability. Not recommended for chloride-rich or marine environments (use 316L). Used in food processing, kitchen equipment, architecture, tanks, and general engineering.
| 15-5PH / X5CrNiCuNb15-5 | 304 / X5CrNi18-10 | |
|---|---|---|
| Material Number | 1.4545 | 1.4301 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-2 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | 304 / 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 | 304 / X5CrNi18-10 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 500–700 | MPa |
| yield_strength | ≥ 1170 | ≥ 190 | MPa |
| elongation | ≥ 10 | ≥ 45 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and 304 / 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 304 / X5CrNi18-10?
15-5PH / X5CrNiCuNb15-5 and 304 / X5CrNi18-10 have a 55% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with 304 / 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 304 / X5CrNi18-10?
The main differences are in the following elements: Cr, Ni. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while 304 / X5CrNi18-10 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.