X4CrNi18-12
1.4303Austenitic Cr-Ni stainless with higher Ni (11-13%) than 304 (8-10.5%) — AISI 305. The higher Ni content lowers work-hardening rate, making it ideal for severe cold forming and deep drawing operations where 304 would crack. Same corrosion resistance as 304. Used for deep-drawn sinks, pots/pans, complex stampings, and cold-headed fasteners where minimum work-hardening is needed.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 305 / UNS S30500 | S30500 | REF |
| 🇪🇺 | EN | Europe | X4CrNi18-12 / 1.4303 | 1.4303 | 100% |
Sources: ASTM A240, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: X4CrNi18-12 (EN) (EN 10088-2) vs X4CrNi18-12 / 1.4303 (EN) (EN 10088-2)
| Element | X4CrNi18-12 (EN) | X4CrNi18-12 / 1.4303 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.06% | 0–0.06% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | 0–0.045% | OK |
| S | 0–0.015% | 0–0.015% | OK |
| Cr | 17–19% | 17–19% | OK |
| Ni | 11–13% | 11–13% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 480–680 | MPa |
| Yield Strength | ≥ 175 | MPa |
| Elongation | ≥ 45 | % |
| Hardness HB | ≤ 185 | HB |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.9 | g/cm3 |
Compatibility verdict
X4CrNi18-12 and X4CrNi18-12 / 1.4303: 100% 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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