X6CrNiNb18-10
1.4550Niobium-stabilized austenitic stainless — European equivalent of AISI 347. Nb (10×C min) binds carbon to prevent Cr-carbide precipitation during welding or service at 400-800°C ("sensitization"). Same base composition as 304 but immune to intergranular corrosion after thermal cycling. Used for welded constructions in chemical plant, nuclear reactor internals, exhaust manifolds, and any 18/10 austenitic application with repeated heat exposure.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 347 / UNS S34700 | S34700 | REF |
| 🇪🇺 | EN | Europe | X6CrNiNb18-10 / 1.4550 | 1.4550 | 100% |
Sources: ASTM A240, EN 10088-3
Chemical composition comparison (wt%)
Side-by-side: X6CrNiNb18-10 (EN 10088-3) vs X6CrNiNb18-10 / 1.4550 (EN) (EN 10088-3)
| Element | X6CrNiNb18-10 (EN 10088-3) | X6CrNiNb18-10 / 1.4550 (EN) | Overlap |
|---|---|---|---|
| C | — | 0–0.08% | — |
| Si | — | 0–1% | — |
Mechanical properties
Compatibility verdict
X6CrNiNb18-10 and X6CrNiNb18-10 / 1.4550: 100% composition match
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
Export this comparison as PDF
Professional datasheet with equivalents, composition, and properties. Ready for your QM documentation.
Download PDF — €4.90Included with PRO subscription