2304 Duplex
Data verified2304 is a lean duplex grade with corrosion resistance comparable to 316L and roughly double its yield strength, without the molybdenum cost of 2205. It is used for tanks, structural parts and bridges in mildly aggressive environments.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.030 |
| Si | ≤1.00 |
| Mn | ≤2.50 |
| P | ≤0.040 |
| S | ≤0.030 |
| Cr | 21.50–24.50 |
| Ni | 3.00–5.50 |
| Mo | 0.05–0.60 |
| Cu | 0.05–0.60 |
| N | 0.05–0.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Solution annealed |
| Hardness | ≤290 HB |
| Tensile strength | 600–820 MPa |
| Yield strength | ≥400 MPa |
| Density | 7.80 g/cm³ |
| Magnetic | Yes |
Heat treatment
Solution anneal 980–1100 °C, rapid cool.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4362 |
| aisi | UNS S32304 |
| gb | 022Cr23Ni4MoCuN |
Compare side by side: 2304 Duplex vs 2101 Duplex · 2304 Duplex vs 2205 Duplex
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Storage and transport tanks, bridge components, water gates, desalination equipment, structural profiles.
Processing: Standard duplex welding practice with matching or over-alloyed fillers; not recommended above about 250–300 °C in pressure service due to 475 °C embrittlement of the ferrite phase.
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Ask for a quotationVisit NasteelSource: ASTM A240 / EN 10088 published ranges (UNS S32304) · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.