15-5PH / X5CrNiCuNb15-5 vs 316 / X5CrNiMo17-12-2: 55% composition overlap. Moderate differences, generally not direct substitutes.
15-5PH / X5CrNiCuNb15-5 vs 316 / X5CrNiMo17-12-2
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.
316 / X5CrNiMo17-12-2
1.4401
Standard-carbon austenitic stainless steel with molybdenum. Higher C than 316L (max 0.07% vs 0.03%) giving slightly higher strength. Same corrosion resistance as 316L. Used where welding is not required or post-weld solution annealing is possible.
| 15-5PH / X5CrNiCuNb15-5 | 316 / X5CrNiMo17-12-2 | |
|---|---|---|
| Material Number | 1.4545 | 1.4401 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-2 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | 316 / X5CrNiMo17-12-2 | 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 | 316 / X5CrNiMo17-12-2 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 530–680 | MPa |
| yield_strength | ≥ 1170 | ≥ 220 | MPa |
| elongation | ≥ 10 | ≥ 40 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and 316 / X5CrNiMo17-12-2 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 316 / X5CrNiMo17-12-2?
15-5PH / X5CrNiCuNb15-5 and 316 / X5CrNiMo17-12-2 have a 55% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with 316 / X5CrNiMo17-12-2?
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 316 / X5CrNiMo17-12-2?
The main differences are in the following elements: Cr, Ni. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while 316 / X5CrNiMo17-12-2 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.
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