15-5PH / X5CrNiCuNb15-5 vs SUS420J2: 44% composition overlap. Significantly different materials serving different application areas.
15-5PH / X5CrNiCuNb15-5 vs SUS420J2
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.
SUS420J2
Japanese martensitic stainless steel — the higher-carbon variant of the 420 family (C 0.26-0.40%). Achieves HRC 50-55 after heat treatment. Very good corrosion resistance for a martensitic grade. THE budget knife/cutlery steel worldwide. Also used for surgical instruments, haircutting scissors, and industrial blades. ≈ EN X30Cr13 (1.4028) / Chinese 3Cr13.
| 15-5PH / X5CrNiCuNb15-5 | SUS420J2 | |
|---|---|---|
| Material Number | 1.4545 | — |
| Category | Stainless Steel | Stainless Steel |
| Standard | AMS 5659 | JIS G4303 |
Chemical composition (wt%)
| Element | 15-5PH / X5CrNiCuNb15-5 | SUS420J2 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0.26–0.4% | No overlap |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1% | 0–1% | OK |
| P | 0–0.03% | 0–0.04% | OK |
Mechanical properties
| Property | 15-5PH / X5CrNiCuNb15-5 | SUS420J2 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 620–700 | MPa |
| yield_strength | ≥ 1170 | 340–400 | MPa |
| elongation | ≥ 10 | 12–18 | % |
Compatibility Assessment
15-5PH / X5CrNiCuNb15-5 and SUS420J2 have significantly different compositions (44% 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 SUS420J2?
15-5PH / X5CrNiCuNb15-5 and SUS420J2 have a 44% composition overlap. They are generally not directly interchangeable.
Can I replace 15-5PH / X5CrNiCuNb15-5 with SUS420J2?
Generally not recommended. The compositions differ significantly (44% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 15-5PH / X5CrNiCuNb15-5 and SUS420J2?
The main differences are in the following elements: C, Cr, Ni. 15-5PH / X5CrNiCuNb15-5 is a Stainless Steel grade, while SUS420J2 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.