304 / X5CrNi18-10 vs X10CrMoVNb9-1: 27% composition overlap. Significantly different materials serving different application areas.
304 / X5CrNi18-10 vs X10CrMoVNb9-1
Side-by-side chemical composition and mechanical property comparison.
Overview
304 / X5CrNi18-10
1.4301
The world's most widely used stainless steel — the original 18/8 austenitic. Good corrosion resistance in atmospheric, organic, and inorganic environments. Excellent formability and weldability. Not recommended for chloride-rich or marine environments (use 316L). Used in food processing, kitchen equipment, architecture, tanks, and general engineering.
X10CrMoVNb9-1
1.4903
High-chromium creep-resistant martensitic steel equivalent to ASTM Grade 91 (P91/T91/F91). V and Nb additions with controlled N provide exceptional creep rupture strength at temperatures up to 580°C. The foundation steel of modern ultra-supercritical (USC) power plants worldwide. Used for main steam pipes, boiler headers, superheater tubes, and high-temperature pressure components in fossil and nuclear power generation.
| 304 / X5CrNi18-10 | X10CrMoVNb9-1 | |
|---|---|---|
| Material Number | 1.4301 | 1.4903 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10216-2 |
Chemical composition (wt%)
| Element | 304 / X5CrNi18-10 | X10CrMoVNb9-1 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0.08–0.12% | No overlap |
| Si | 0–1% | 0.2–0.5% | OK |
| Mn | 0–2% | 0.3–0.6% | OK |
| P | 0–0.045% | ≤ 0.02% | OK |
Mechanical properties
| Property | 304 / X5CrNi18-10 | X10CrMoVNb9-1 | Unit |
|---|---|---|---|
| tensile_strength | 500–700 | 585–780 | MPa |
| yield_strength | ≥ 190 | ≥ 415 | MPa |
| elongation | ≥ 45 | ≥ 20 | % |
Compatibility Assessment
304 / X5CrNi18-10 and X10CrMoVNb9-1 have significantly different compositions (27% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 304 / X5CrNi18-10 the same as X10CrMoVNb9-1?
304 / X5CrNi18-10 and X10CrMoVNb9-1 have a 27% composition overlap. They are generally not directly interchangeable.
Can I replace 304 / X5CrNi18-10 with X10CrMoVNb9-1?
Generally not recommended. The compositions differ significantly (27% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 304 / X5CrNi18-10 and X10CrMoVNb9-1?
The main differences are in the following elements: C, Cr. 304 / X5CrNi18-10 is a Stainless Steel grade, while X10CrMoVNb9-1 is a Stainless Steel grade.
Related Comparisons
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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.