X5CrNi18-12
1.4303Austenitic stainless steel similar to 1.4301 (AISI 304) but with higher nickel content (11-13% vs 8-10.5%) for improved austenite stability and better resistance to stress corrosion cracking. The higher Ni also provides better formability and deeper drawability. C ≤0.06% reduces sensitization risk. Used where enhanced SCC resistance is needed: chemical processing, food industry equipment, pharmaceutical vessels, and heat exchangers in chloride-containing environments.
Chemical composition comparison (wt%)
Side-by-side: X5CrNi18-12 (EN) (EN 10088-2) vs ASTM
| Element | X5CrNi18-12 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | ≤ 0.06% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 2% | — | — |
| P | ≤ 0.045% | — | — |
| S | ≤ 0.015% | — | — |
| Cr | 17–19% | — | — |
| Ni | 11–13% | — | — |
| N | ≤ 0.11% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 500–700 | MPa |
| Yield Strength | ≥ 190 | MPa |
| Elongation | ≥ 40 | % |
| Hardness HB | ≤ 215 | HB |
General
| Property | Value | Unit |
|---|---|---|
| Density | ≥ 7.9 | 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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