303 vs X2CrNi19-11: 53% composition overlap. Moderate differences, generally not direct substitutes.
303 vs X2CrNi19-11
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.
X2CrNi19-11
1.4306
Low-carbon 18/10 austenitic stainless — AISI 304L. C max 0.030% prevents sensitization after welding without stabilizing elements. THE welding-grade 304. Slightly higher Ni (10-12.5%) than 1.4301 (304) for better austenite stability. Used for welded vessels, piping, food equipment, and any 304 application requiring post-weld corrosion resistance without solution annealing.
| 303 | X2CrNi19-11 | |
|---|---|---|
| Material Number | 1.4305 | 1.4306 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-3 |
Chemical composition (wt%)
| Element | 303 | X2CrNi19-11 | Overlap |
|---|---|---|---|
| C | 0–0.1% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | — | — |
Mechanical properties
| Property | 303 | X2CrNi19-11 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | 480–680 | MPa |
| yield_strength | ≥ 190 | ≥ 175 | MPa |
| elongation | ≥ 35 | ≥ 40 | % |
Compatibility Assessment
303 and X2CrNi19-11 have moderate differences (53% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 303 the same as X2CrNi19-11?
303 and X2CrNi19-11 have a 53% composition overlap. They are generally not directly interchangeable.
Can I replace 303 with X2CrNi19-11?
Generally not recommended. The compositions differ significantly (53% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 303 and X2CrNi19-11?
The main differences are in the following elements: Cr, Ni. 303 is a Stainless Steel grade, while X2CrNi19-11 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.