Lean Duplex 2304
1.4362Lean duplex stainless steel with low Mo content. More economical than 2205 with better corrosion resistance than 304/316L. Developed for construction, water treatment, and storage tanks where full duplex properties are not required.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | UNS S32304 | S32304 | REF |
| 🇪🇺 | EN | Europe | X2CrNiN23-4 | 1.4362 | 100% |
| 🇯🇵 | JIS | Japan | SUS329J4L | — | 85% |
Sources: ASTM A240, EN 10088-2, JIS G4303
Chemical composition comparison (wt%)
Side-by-side: Lean Duplex 2304 (EN) (EN 10088-2) vs SUS329J4L (JIS)
| Element | Lean Duplex 2304 (EN) | SUS329J4L (JIS) | Overlap |
|---|---|---|---|
| C | 0–0.03% | — | — |
| Si | 0–1% | — | — |
| Mn | 0–2% | — | — |
| P | 0–0.035% | — | — |
| S | 0–0.015% | — | — |
| Cr | 22–24% | — | — |
| Mo | 0.1–0.6% | — | — |
| Ni | 3.5–5.5% | — | — |
| Cu | 0.05–0.6% | — | — |
| N | 0.05–0.2% | — | — |
Mechanical properties
Solution Treated
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 600–830 | MPa |
| Yield Strength | ≥ 400 | MPa |
| Elongation | ≥ 25 | % |
| Hardness HB | ≤ 270 | HB |
| Elastic Modulus | ≥ 200 | GPa |
| Density | ≥ 7.8 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| solution_treating | 950–1050 °C | water | Rapid cooling mandatory | Lower solution temperature than 2205 due to different phase balance |
Compatibility verdict
Lean Duplex 2304 and SUS329J4L: 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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