Lean Duplex 2101 / X2CrMnNiN21-5-1
1.4162Lean duplex stainless steel with minimal Ni and Mo — the most cost-effective duplex grade. Uses Mn and N instead of expensive Ni for austenite stability. Double the yield strength of 304 (450 MPa vs 190 MPa). Used as a direct replacement for 304/316L where higher strength or better SCC resistance is needed.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | UNS S32101 | S32101 | REF |
| 🇪🇺 | EN | Europe | X2CrMnNiN21-5-1 | 1.4162 | 100% |
Sources: ASTM A240, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: Lean Duplex 2101 / X2CrMnNiN21-5-1 (EN) (EN 10088-2) vs X2CrMnNiN21-5-1 (EN) (EN 10088-2)
| Element | Lean Duplex 2101 / X2CrMnNiN21-5-1 (EN) | X2CrMnNiN21-5-1 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.04% | 0–0.04% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 4–6% | 4–6% | OK |
| P | 0–0.04% | 0–0.04% | OK |
| S | 0–0.015% | 0–0.015% | OK |
| Cr | 21–22% | 21–22% | OK |
| Mo | 0.1–0.8% | 0.1–0.8% | OK |
| Ni | 1.35–1.7% | 1.35–1.7% | OK |
| Cu | 0.1–0.8% | 0.1–0.8% | OK |
| N | 0.2–0.25% | 0.2–0.25% | OK |
Mechanical properties
Solution Treated
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 650–850 | MPa |
| Yield Strength | ≥ 450 | MPa |
| Elongation | ≥ 30 | % |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.8 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| solution_treating | 1020–1100 °C | water | Rapid cooling critical | Avoid holding 300-1000°C — sigma and 475°C embrittlement risk |
Compatibility verdict
Lean Duplex 2101 / X2CrMnNiN21-5-1 and X2CrMnNiN21-5-1: 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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