301 vs 440C / X105CrMo17: 51% composition overlap. Moderate differences, generally not direct substitutes.
301 vs 440C / X105CrMo17
Side-by-side chemical composition and mechanical property comparison.
Overview
301
1.4310
Austenitic stainless steel with the highest work-hardening rate of all 300-series grades. Lower Cr and Ni (17/7 vs 18/9 for 304) makes it metastable — cold working induces martensite transformation for extreme strength (UTS >1300 MPa in full-hard temper). THE stainless spring steel. Used for stainless springs, washers, clips, structural components requiring high strength + corrosion resistance, and railway car bodies.
440C / X105CrMo17
1.4125
Highest-hardness standard martensitic stainless steel. Achieves 57-60 HRC — the hardest commonly available stainless grade. Excellent wear resistance from chromium carbides. Used for bearings, races, valve components, surgical instruments, high-end cutlery, and precision molds.
| 301 | 440C / X105CrMo17 | |
|---|---|---|
| Material Number | 1.4310 | 1.4125 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-3 |
Chemical composition (wt%)
| Element | 301 | 440C / X105CrMo17 | Overlap |
|---|---|---|---|
| C | 0.05–0.15% | 0.95–1.2% | No overlap |
| Si | 0–2% | 0–1% | OK |
| Mn | 0–2% | 0–1% | OK |
| P | 0–0.045% | 0–0.04% | OK |
Mechanical properties
| Property | 301 | 440C / X105CrMo17 | Unit |
|---|---|---|---|
| tensile_strength | 520–720 | ≥ 690 | MPa |
| yield_strength | ≥ 205 | ≥ 440 | MPa |
| elongation | ≥ 45 | — | % |
Compatibility Assessment
301 and 440C / X105CrMo17 have moderate differences (51% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 301 the same as 440C / X105CrMo17?
301 and 440C / X105CrMo17 have a 51% composition overlap. They are generally not directly interchangeable.
Can I replace 301 with 440C / X105CrMo17?
Generally not recommended. The compositions differ significantly (51% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 301 and 440C / X105CrMo17?
The main differences are in the following elements: C. 301 is a Stainless Steel grade, while 440C / X105CrMo17 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.