X2CrNi12
1.4003Lean ferritic stainless with just 12% Cr and ~1% Ni — the cheapest stainless option. Also called "utility ferritic" or 3CR12. Lower corrosion resistance than 304 but much better than carbon steel. Magnetic, weldable (with precautions), and formable. Used where mild corrosion resistance at lowest cost is the goal: railway wagons, coal trucks, bus chassis, sugar mills, and architectural cladding in mild environments.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS S40977 | S40977 | REF |
| 🇪🇺 | EN | Europe | X2CrNi12 / 1.4003 | 1.4003 | 100% |
Sources: ASTM A240, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: X2CrNi12 (EN) (EN 10088-2) vs X2CrNi12 / 1.4003 (EN) (EN 10088-2)
| Element | X2CrNi12 (EN) | X2CrNi12 / 1.4003 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–1.5% | 0–1.5% | OK |
| P | 0–0.04% | 0–0.04% | OK |
| S | 0–0.015% | 0–0.015% | OK |
| Cr | 10.5–12.5% | 10.5–12.5% | OK |
| Ni | 0.3–1% | 0.3–1% | OK |
| N | 0–0.03% | 0–0.03% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 450–650 | MPa |
| Yield Strength | 250–320 | MPa |
| Elongation | ≥ 18 | % |
| Elastic Modulus | ≥ 220 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Compatibility verdict
X2CrNi12 and X2CrNi12 / 1.4003: 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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