X2CrNiMo18-14-3
1.4435High-Mo, high-Ni variant of 316L. Often specified for pharmaceutical and biotech cleanroom applications where delta-ferrite must be minimized (high Ni ensures fully austenitic structure). Also used in chemical processing and offshore. Often dual-certified with 1.4404.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 316L | S31603 | REF |
| 🇪🇺 | EN | Europe | X2CrNiMo18-14-3 | 1.4435 | 100% |
| 🇪🇺 | OTHER | Europe | 1.4404 (316L) | 1.4404 | 85% |
Sources: ASTM A240, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: X2CrNiMo18-14-3 (EN) (EN 10088-2) vs 1.4404 (316L) (OTHER)
| Element | X2CrNiMo18-14-3 (EN) | 1.4404 (316L) (OTHER) | Overlap |
|---|---|---|---|
| C | 0–0.03% | — | — |
| Si | 0–1% | — | — |
| Mn | 0–2% | — | — |
| P | 0–0.045% | — | — |
| S | 0–0.015% | — | — |
| Cr | 17–19% | — | — |
| Mo | 2.5–3% | — | — |
| Ni | 12.5–15% | — | — |
| N | 0–0.11% | — | — |
Mechanical properties
Solution Treated
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 490–680 | MPa |
| Yield Strength | ≥ 200 | MPa |
| Elongation | ≥ 40 | % |
| Hardness HB | ≤ 215 | HB |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 8 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| solution_treating | 1020–1100 °C | water | Rapid cooling required | Same as 316L. Ensure rapid cooling to prevent sensitization. |
Compatibility verdict
X2CrNiMo18-14-3 and 1.4404 (316L): 85% 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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