Lean Duplex 2304 (UNS S32304) Seamless Pipes & Tubes
Duplex 2304 (UNS S32304) is a lean duplex stainless steel with minimal molybdenum content. It offers approximately double the yield strength of 304L while maintaining similar corrosion resistance. The lean composition makes it a cost-effective alternative to both 316L and standard duplex 2205.
Size Range
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness
SCH 5S to SCH 80S
Standards
3 specs
Chemical Composition (% by weight)
| C | Mn | Si | Cr | Ni | Mo | N | Cu | P | S |
|---|---|---|---|---|---|---|---|---|---|
| 0.030 max | 2.50 max | 1.00 max | 21.5-24.5 | 3.0-5.5 | 0.05-0.60 | 0.05-0.20 | 0.05-0.60 | 0.040 max | 0.030 max |
Mechanical Properties (Minimum at Room Temperature)
| Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| 600 MPa min | 400 MPa min | 25% min | 290 HBW max |
Physical Properties - Duplex 2304
| Density | Melting Range | Thermal Conductivity | Electrical Resistivity | Specific Heat | Coeff. of Thermal Expansion |
|---|---|---|---|---|---|
| 7.75 g/cm3 | 1400-1450 C | 17 W/m-K | 800 nOhm-m | 480 J/kg-K | 13.0 um/m-C |
Corrosion Resistance - Duplex 2304
| Property | Value |
|---|---|
| Pitting Resistance (PREN) | ~25 |
| Max Service Temp (Oxidizing) | 315 C |
| Intergranular Corrosion | Resistant |
| Stress Corrosion Cracking | Good resistance vs austenitic |
| General Corrosion Rate | Similar to 316L |
| Seawater Resistance | Moderate |
Equivalent International Grades
| ASTM | Trade | EN |
|---|---|---|
| S32304 | SAF 2304 | 1.4362 |
Duplex 2304 vs Comparable Grades
| Grade | UNS | Tensile | Yield | PREN | Max Temp |
|---|---|---|---|---|---|
| Duplex 2205Duplex Stainless Steel | S32205 | 655 MPa min | 450 MPa min | ~35 | 315 C (to avoid 475C embrittlement) |
| SS 316 / 316LAustenitic Stainless Steel | S31600 | 515 / 485 MPa min | 205 / 170 MPa min | ~24 | 870 C |
| SS 304 / 304LAustenitic Stainless Steel | S30400 | 515 / 485 MPa min | 205 / 170 MPa min | ~18 | 870 C |
Applicable Standards
Applications
Key Advantages of Duplex 2304
Duplex 2304 Applications by Region
Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait)
Growing use in construction, water infrastructure, and storage tanks in UAE and Saudi Arabia.
Europe (Germany, UK, Norway, Netherlands, Italy)
Widely used in construction, bridges, and transport tankers in Scandinavia, Germany, and Netherlands.
United States
Increasing adoption in construction, water treatment, and process industries.
Frequently Asked Questions about Duplex 2304 Seamless Pipes
Quick Specifications
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
SCH 5S to SCH 80S
Industries Served
Related Grades
Ready to Order Duplex 2304 Seamless Pipes?
Stancor is India's leading manufacturer of Duplex 2304 seamless pipes, exporting to UAE, Saudi Arabia, Qatar, Germany, UK, and USA. Contact our sales team for competitive pricing, fast delivery, and full material certification.