2304 S32304 1.4362 Duplex Stainless Steel Pipe
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Duplex 2304 Stainless Steel is a duplex stainless steel composed of 23% chromium and 4% nickel, used in most of the applications where 304 and 316 stainless steel are used.
The corrosion resistance of the 2304 alloy is similar to that of 316L.
Additionally, its mechanical properties, specifically the yield strength, are twice that of the 304L/316L austenitic grades. This characteristic allows designers to reduce the weight of products, especially when designing pressure vessels.
Compared to 304 and 316 austenitic steels, the 2304 alloy has a stronger resistance to stress corrosion due to its duplex microstructure, lower nickel content, and higher chromium content.
Duplex 2304 Stainless Steel Applications:
Most areas where 304 and 316 are used
Pulp and paper industry (chip, chip storage tanks, black or white liquor tanks, classifiers)
Caustic soda solutions, organic acids (resistant to SCC)
Food industry
Pressure vessels (weight reduction)
Mining industry (abrasion/corrosion)
Stainless Steel Alloy 2304 Equivalent grades
| DIN | EU EN |
USA – |
Commercial | France AFNOR |
Sweden SS |
Russia GOST |
| 1.4362 | X2CrNiN23-4 | S32304 | 2304 | Z3CN23-04Az | 2327 | 03KH23N6 |
Duplex 2304 Chemical composition %
| C | Si | Mn | Ni | P | S | Cr | Mo | N | Cu |
| max 0.03 | max 1 | max 2 | 3.5 – 5.5 | max 0.035 | max 0.015 | 22 – 24 | 0.1 – 0.6 | 0.05 – 0.2 | 0.1 – 0.6 |
2304 Duplex Steel Mechanical Properties
| Grade | Tensile Strength ksi (MPa) min |
Yield Strength 0.2% offset ksi (MPa) min |
Elongation (% in 50mm) min | Hardness (Brinell) MAX |
Hardness (Rockwell B) MAX |
| Duplex 2304 | 87 (600) |
58 (400) |
25 | 293 | 31^j |
Stainless Steel Tube & Pipe Sizes:
Outsider Diameter OD : 6-630mm ; WT 3-60mm ; L max 16meter
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