439 / X2CrTi17
1.451017% Cr Ti-stabilized ferritic stainless. Cost-effective alternative to 304 for many applications — no Ni means ~30-40% lower cost. Immune to chloride SCC. Used for automotive exhaust systems (downstream), kitchen sinks, washing machine drums, heat exchangers, and architectural trim.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 439 | S43035 | REF |
| 🇪🇺 | EN | Europe | X2CrTi17 | 1.4510 | 100% |
| 🇯🇵 | JIS | Japan | SUS430LX | — | 90% |
Sources: ASTM A240, EN 10088-2, JIS G4305
Chemical composition comparison (wt%)
Side-by-side: 439 / X2CrTi17 (EN) (EN 10088-2) vs SUS430LX (JIS)
| Element | 439 / X2CrTi17 (EN) | SUS430LX (JIS) | Overlap |
|---|---|---|---|
| C | 0–0.03% | — | — |
| Si | 0–1% | — | — |
| Mn | 0–1% | — | — |
| P | 0–0.04% | — | — |
| S | 0–0.015% | — | — |
| Cr | 16–18% | — | — |
| Ti | 0–0.8% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 400–600 | MPa |
| Yield Strength | ≥ 230 | MPa |
| Elongation | ≥ 22 | % |
| Hardness HB | ≤ 200 | HB |
| Elastic Modulus | ≥ 220 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Compatibility verdict
439 / X2CrTi17 and SUS430LX: 90% 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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