X6CrNiTi18-10
1.4541Titanium-stabilized austenitic stainless — AISI 321. Ti (5×C min) prevents Cr-carbide sensitization during welding or service at 400-800°C. Same approach as Nb-stabilized 347 (1.4550) but with Ti instead. Better creep resistance than 304/304L at elevated temperature. Used for exhaust manifolds, aircraft exhaust systems, expansion bellows, and high-temperature chemical plant (to ~800°C).
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 321 / UNS S32100 | S32100 | REF |
| 🇪🇺 | EN | Europe | X6CrNiTi18-10 / 1.4541 | 1.4541 | 100% |
| 🇯🇵 | JIS | Japan | SUS321 | — | 95% |
Sources: ASTM A240, EN 10088-3, JIS G4303
Chemical composition comparison (wt%)
Side-by-side: X6CrNiTi18-10 (EN) (EN 10088-3) vs SUS321 (JIS)
| Element | X6CrNiTi18-10 (EN) | SUS321 (JIS) | Overlap |
|---|---|---|---|
| C | 0–0.08% | — | — |
| Si | 0–1% | — | — |
| Mn | 0–2% | — | — |
| Cr | 17–19% | — | — |
| Ni | 9–12% | — | — |
| Ti | ≤ 0.7% | — | — |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–700 | MPa |
| Yield Strength | ≥ 190 | MPa |
| Elongation | ≥ 40 | % |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.9 | g/cm3 |
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–730 | MPa |
| Yield Strength Rp0.2 | ≥ 190 | MPa |
| Elongation A | ≥ 40 | % |
| Hardness HB | ≤ 215 | HB |
Compatibility verdict
X6CrNiTi18-10 and SUS321: 95% composition match
Close equivalents but NOT identical.
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.
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