Duplex steel of recent design, it has a high resistance to corrosion. It is used in place of AISI 304 and, for certain applications, also in place of AISI 316. Typical applications include the petrochemical industry, the paper industry, heat exchangers and valves for the oil and gas industry, and construction.
Standard Reference: EN 10088-3: 2014 (Hot-rolled and bright products)
| EUROPE | ITALY | GERMANY | FRANCE | USA | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10088-3: 2005 |
(UNI 6900:71) |
(DIN 17440-86) |
(NF A 35-574-90) |
ASTM A 182 | AISI | ||
| Grade | N° | Werkstoff | N° | ||||
| X2CrNiN23-4 | 1.4362 | - | - | - | - | F51-S31803 | AISI 2304 |
| C / max | Si / max | Mn / max | P / max | S / max | Cr | Cu | Mo | N | Ni |
|---|---|---|---|---|---|---|---|---|---|
| 0,03 | 1,00 | 2,00 | 0,035 | 0,015 | 22,0÷24,5 | 0,10÷0,60 | 0,10÷0,60 | 0,05÷0,20 | 3,50÷5,50 |
| Size (mm) | Hardness HB max | Rp 0,2 (MPa) min | Rm (MPa) | A5 (%) max | Resistance to intergranular corrosion | |
|---|---|---|---|---|---|---|
| in the delivery condition | in the welded condition | |||||
| d≤160 | 260 | 400 | 600÷830 | 25 | YES | YES |
| Level of resistance | Rm (MPa) |
|---|---|
| + C 800 | 800÷1000 |
| + C 900 | 900÷1100 |
| + C 1000 | 1000÷1250 |
| + C 1100 | 1100÷1350 |
| + C 1200 | 1200÷1450 |
| + C 1400 | 1400÷1700 |
| + C 1600 | 1600÷1900 |
| + C1800 | 1800÷2100 |
| Size | Rm (MPa) | A5 (%) min |
|---|---|---|
| 0,50≤d≤1,00 | 1050 | 20 |
| 1,00≤d≤3,00 | 1000 | 20 |
| 3,00≤d≤5,00 | 950 | 25 |
| 5,00≤d≤16,00 | 900 | 25 |
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