303 vs X46Cr13: 40% composition overlap. Significantly different materials serving different application areas.
303 vs X46Cr13
Side-by-side chemical composition and mechanical property comparison.
Overview
303
1.4305
Free-machining austenitic stainless steel — the most machinable of all austenitic grades. 0.15-0.35% S (as MnS inclusions) provides excellent chip-breaking. Trade-off: lower corrosion resistance than 304, poor weldability (hot cracking risk), and not suitable for cold forming. Used for high-volume automatic lathe parts: fittings, valves, screws, shafts, and precision components.
X46Cr13
1.4034
Martensitic chromium stainless steel with high carbon content (0.43-0.50%) and 12.5-14.5% Cr. The highest carbon grade in the basic Cr13 martensitic series. Achieves hardness up to 56 HRC. Good compromise between hardness and corrosion resistance. Equivalent to AISI 420C/420HC. Used for knife blades, surgical instruments, razor blades, CO2 capture pipes, and precision cutting tools. Good polishing capability.
| 303 | X46Cr13 | |
|---|---|---|
| Material Number | 1.4305 | 1.4034 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-2 |
Chemical composition (wt%)
| Element | 303 | X46Cr13 | Overlap |
|---|---|---|---|
| C | 0–0.1% | 0.43–0.5% | No overlap |
| Si | 0–1% | ≤ 1% | OK |
| Mn | 0–2% | ≤ 1% | OK |
| P | 0–0.045% | ≤ 0.04% | OK |
Mechanical properties
| Property | 303 | X46Cr13 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | ≥ 900 | MPa |
| yield_strength | ≥ 190 | ≥ 700 | MPa |
| elongation | ≥ 35 | ≥ 8 | % |
Compatibility Assessment
303 and X46Cr13 have significantly different compositions (40% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 303 the same as X46Cr13?
303 and X46Cr13 have a 40% composition overlap. They are generally not directly interchangeable.
Can I replace 303 with X46Cr13?
Generally not recommended. The compositions differ significantly (40% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 303 and X46Cr13?
The main differences are in the following elements: C, S, Cr. 303 is a Stainless Steel grade, while X46Cr13 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.