X2CrTiNb18
1.4509Ti- and Nb-stabilized ferritic stainless steel with very low carbon (max 0.03%) and 17.5-18.5% Cr. The dual stabilization with Ti and Nb provides excellent resistance to intergranular corrosion and superior high-temperature oxidation resistance. Non-hardenable. Used extensively for automotive exhaust manifolds, catalytic converter housings, heat exchangers, furnace parts, and kitchen equipment. More economical than austenitic grades for high-temperature applications.
Chemical composition comparison (wt%)
Side-by-side: X2CrTiNb18 (EN) (EN 10088-2) vs ASTM
| Element | X2CrTiNb18 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | ≤ 0.03% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 1% | — | — |
| P | ≤ 0.04% | — | — |
| S | ≤ 0.015% | — | — |
| Cr | 17.5–18.5% | — | — |
| Ti | 0.1–0.6% | — | — |
| Nb | ≤ 0.6% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 430–630 | MPa |
| Yield Strength | ≥ 230 | MPa |
| Elongation | ≥ 18 | % |
| Density | ≥ 7.7 | g/cm3 |
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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