15-5PH / X5CrNiCuNb15-5 vs 420A / X20Cr13: 46% composition overlap. Significantly different materials serving different application areas.
15-5PH / X5CrNiCuNb15-5 vs 420A / X20Cr13
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.
420A / X20Cr13
1.4021
Medium-carbon martensitic stainless steel. Higher hardness than 410 but lower than 420C (1.4034). Good balance of strength, corrosion resistance and machinability. Used for turbine blades, pump shafts, valves, bolts, surgical instruments, and cutlery.
| 15-5PH / X5CrNiCuNb15-5 | 420A / X20Cr13 | |
|---|---|---|
| Material Number | 1.4545 | 1.4021 |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | EN 10088-3 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | 420A / X20Cr13 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0.16–0.25% | No overlap |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–1.5% | OK |
| P | 0–0.03% | 0–0.04% | OK |
Mechanical properties
| Property | 15-5PH / X5CrNiCuNb15-5 | 420A / X20Cr13 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 700–850 | MPa |
| yield_strength | ≥ 1170 | ≥ 500 | MPa |
| elongation | ≥ 10 | ≥ 13 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and 420A / X20Cr13 have significantly different compositions (46% 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 420A / X20Cr13?
15-5PH / X5CrNiCuNb15-5 and 420A / X20Cr13 have a 46% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with 420A / X20Cr13?
Generally not recommended. The compositions differ significantly (46% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 15-5PH / X5CrNiCuNb15-5 and 420A / X20Cr13?
The main differences are in the following elements: C, Cr. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while 420A / X20Cr13 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.