303 vs X6CrNiMoTi17-12-2: 63% composition overlap. Moderate differences, generally not direct substitutes.
303 vs X6CrNiMoTi17-12-2
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.
X6CrNiMoTi17-12-2
1.4571
Titanium-stabilized austenitic Cr-Ni-Mo steel — AISI 316Ti. THE German standard industrial stainless (known as "V4A"). Ti prevents Cr-carbide precipitation at 450-850°C giving intergranular corrosion resistance after welding. Better high-temp stability than 316L (up to 550°C). PREN 23-27. Used extensively in chemical/pharmaceutical plants, pressure vessels, food processing, apparatus construction, and shipbuilding.
| 303 | X6CrNiMoTi17-12-2 | |
|---|---|---|
| Material Number | 1.4305 | 1.4571 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-3 |
Chemical composition (wt%)
| Element | 303 | X6CrNiMoTi17-12-2 | Overlap |
|---|---|---|---|
| C | 0–0.1% | 0–0.08% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | 0–0.045% | OK |
Mechanical properties
| Property | 303 | X6CrNiMoTi17-12-2 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | 500–700 | MPa |
| yield_strength | ≥ 190 | ≥ 200 | MPa |
| elongation | ≥ 35 | ≥ 40 | % |
Compatibility Assessment
303 and X6CrNiMoTi17-12-2 have moderate differences (63% 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 X6CrNiMoTi17-12-2?
303 and X6CrNiMoTi17-12-2 have a 63% composition overlap. They are generally not directly interchangeable.
Can I replace 303 with X6CrNiMoTi17-12-2?
Generally not recommended. The compositions differ significantly (63% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 303 and X6CrNiMoTi17-12-2?
The main differences are in the following elements: S, Cr, Ni. 303 is a Stainless Steel grade, while X6CrNiMoTi17-12-2 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.