15-5PH / X5CrNiCuNb15-5 vs 409 / X2CrTi12: 64% composition overlap. Moderate differences, generally not direct substitutes.
15-5PH / X5CrNiCuNb15-5 vs 409 / X2CrTi12
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.
409 / X2CrTi12
1.4512
Lowest-chromium ferritic stainless steel with Ti stabilization. Developed specifically for automotive exhaust systems as a cost-effective alternative to austenitic grades. Good oxidation resistance to ~800°C. Used for exhaust manifolds, catalytic converters, mufflers, and heat shields.
| 15-5PH / X5CrNiCuNb15-5 | 409 / X2CrTi12 | |
|---|---|---|
| Material Number | 1.4545 | 1.4512 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-2 |
Chemical composition (wt%) — Pro
| Element | 15-5PH / X5CrNiCuNb15-5 | 409 / X2CrTi12 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–1% | OK |
| P | 0–0.03% | 0–0.04% | OK |
| S | |||
| Cr | |||
| Ni | |||
| Cu | |||
| Ti | |||
| Nb |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | 15-5PH / X5CrNiCuNb15-5 | 409 / X2CrTi12 | Unit |
|---|---|---|---|
| Tensile Strength | ≥ 1310 | 380–560 | MPa |
| Yield Strength | ≥ 1170 | ≥ 210 | MPa |
| Elongation | ≥ 10 | ≥ 25 | % |
| Hardness HRC | |||
| Elastic Modulus | |||
| Density |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
15-5PH / X5CrNiCuNb15-5 and 409 / X2CrTi12 have moderate differences (64% 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 409 / X2CrTi12?
15-5PH / X5CrNiCuNb15-5 and 409 / X2CrTi12 have a 64% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with 409 / X2CrTi12?
Generally not recommended. The compositions differ significantly (64% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 15-5PH / X5CrNiCuNb15-5 and 409 / X2CrTi12?
The main differences are in the following elements: Cr. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while 409 / X2CrTi12 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.