17-4PH vs 304 Stainless Steel: 57% composition overlap. Moderate differences, generally not direct substitutes.
17-4PH vs 304 Stainless Steel
Side-by-side chemical composition and mechanical property comparison.
Overview
17-4PH
1.4542
The most widely used precipitation-hardening stainless steel. Combines high strength (up to 1310 MPa UTS) with corrosion resistance comparable to 304. Delivered solution-annealed and hardened by simple low-temperature aging. Used in aerospace, medical, oil & gas, and nuclear applications.
304 Stainless Steel
1.4301
The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
| 17-4PH | 304 Stainless Steel | |
|---|---|---|
| Material Number | 1.4542 | 1.4301 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-2 |
Chemical composition (wt%)
| Element | 17-4PH | 304 Stainless Steel | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.07% | OK |
| Si | 0–0.7% | 0–1% | OK |
| Mn | 0–1.5% | 0–2% | OK |
| P | 0–0.04% | 0–0.045% | OK |
Mechanical properties
| Property | 17-4PH | 304 Stainless Steel | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 520–720 | MPa |
| yield_strength | ≥ 1170 | ≥ 210 | MPa |
| elongation | ≥ 10 | ≥ 45 | % |
Compatibility Assessment
17-4PH and 304 Stainless Steel have moderate differences (57% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 17-4PH the same as 304 Stainless Steel?
17-4PH and 304 Stainless Steel have a 57% composition overlap. They are generally not directly interchangeable.
Can I replace 17-4PH with 304 Stainless Steel?
Generally not recommended. The compositions differ significantly (57% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 17-4PH and 304 Stainless Steel?
The main differences are in the following elements: Cr, Ni. 17-4PH is a Stainless Steel grade, while 304 Stainless Steel is a Stainless Steel grade.
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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.