304 Stainless Steel vs X8CrNiS18-9: 61% composition overlap. Moderate differences, generally not direct substitutes.
304 Stainless Steel vs X8CrNiS18-9
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
X8CrNiS18-9
1.4305
THE free-cutting austenitic stainless — AISI 303. Sulfur 0.15-0.35% for short-breaking chips and excellent machinability. Not weldable (hot cracking risk from S). Reduced corrosion resistance vs 304 due to sulfide inclusions. Used for high-volume CNC screw machine production of fittings, shafts, bushings, valves, and any turned stainless part where machining cost dominates.
| 304 Stainless Steel | X8CrNiS18-9 | |
|---|---|---|
| Material Number | 1.4301 | 1.4305 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-3 |
Chemical composition (wt%) — Pro
| Element | 304 Stainless Steel | X8CrNiS18-9 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.1% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | — | — |
| S | |||
| Cr | |||
| Ni | |||
| Cu | |||
| N |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | 304 Stainless Steel | X8CrNiS18-9 | Unit |
|---|---|---|---|
| Tensile Strength | 520–720 | 500–750 | MPa |
| Yield Strength | ≥ 210 | ≥ 190 | MPa |
| Elongation | ≥ 45 | ≥ 35 | % |
| Hardness HB | |||
| Elastic Modulus | |||
| Density | |||
| Tensile Strength | |||
| Yield Strength Rp0.2 | |||
| Elongation A | |||
| Hardness HB |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
304 Stainless Steel and X8CrNiS18-9 have moderate differences (61% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 304 Stainless Steel the same as X8CrNiS18-9?
304 Stainless Steel and X8CrNiS18-9 have a 61% composition overlap. They are generally not directly interchangeable.
Can I replace 304 Stainless Steel with X8CrNiS18-9?
Generally not recommended. The compositions differ significantly (61% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 304 Stainless Steel and X8CrNiS18-9?
The main differences are in the following elements: S, Cr. 304 Stainless Steel is a Stainless Steel grade, while X8CrNiS18-9 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.