Enchanced Duplex steel EDX 2304 / 1.4362 with ferritic and austenitic structure according to EN 10088-1, ASTM A240.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | Cu: | N: | |
| EN | X2CrNiN23-4 - 1.4362 | |||||||||
| <0.03 | <2.0 | <1.0 | <0.035 | <0.015 | 22.0 - 24.5 | 3.5 - 5.5 | 0.1 - 0.6 | 0.1 - 0.6 | 0.05 - 0.20 | |
| SANDVIK OUTOKUMPU | SAF 2304 - EDX 2304 - 2304 Duplex | |||||||||
| <0.03 | <2.0 | <1.0 | <0.035 | <0.015 | 22.5 | 4.5 | - | - | 0.1 | |
| AFNOR | Z3CN23-04Az - Z 3 CN 23-04 Az | |||||||||
| <0.03 | <2.0 | <0.75 | <0.035 | <0.010 | 22.0 - 24.0 | 3.5 - 5.0 | - | <0.6 | 0.08 - 0.18 | |
| UNS | UNS S32304 - UNS S39230 - F68 | |||||||||
| <0.03 | <2.5 | <1.0 | <0.040 | <0.030 | 21.5 - 24.5 | 3.0 - 5.5 | 0.05 - 0.60 | 0.05 - 0.60 | 0.05 - 0.20 | |
| GB/T | 022Cr23Ni4MoCuN - 00Cr23Ni4N - S23043 | |||||||||
| <0.03 | <2.5 | <1.0 | <0.035 | <0.030 | 21.5 - 24.5 | 3.0 - 5.5 | 0.05 - 0.60 | 0.05 - 0.60 | 0.05 - 0.20 | |
Applications and specifications
Duplex 1.4362 is another variant of biphasic austenitic-ferritic grades with high mechanical properties and increased corrosion resistance, especially intergranular after welding and in delivery condition.
Grades are used in the paper, petrochemical and fuel industries, chemical, shipbuilding, nitrogen, aerospace, construction, heat and power generation and cryogenic industries. Enhanced Duplex (abbreviated to EDX 2304™) is a "reinforced" variety of 1.4362 grade with a slightly higher content of chromium, molybdenum, carbon and proportionally lower content of nickel than the standard S32304 made on special request.
The steel supplied most often in the form of bars, plates and pipes is used in the manufacture of tanks for chemical compounds, responsible screws, sleeves, valves, shafts, stirrers, desalination systems, flanges, pumps, pipelines as well as radiators and for the construction of aircraft structures.
Duplex 1.4362 / X2CrNiN23-4 has a high resistance to acid environments and stress corrosion. It is a great, much better alternative to austenitic 316L / 1.4404 stainless steel and can also be used interchangeably with 1.4460 / X3CrNiMoN27-5-2.
General mechanical properties of X2CrNiN23-4, 1.4362
- Tensile strength, Rm: 600 - 850 MPa
- Yield strength, Rp0,2: >400 MPa
- Elongation, A: >25%
- Modulus of elasticity, E = 200 GPa
- Thermal capacity, cp20℃ = 500 J ⋅ kg-1 ⋅ K-1
- Thermal conductivity, λ = 15 W ⋅ m-1 ⋅ K-1
- Hardness: <260 HB
- Impact energy, KV20℃: > 100 J
Mechanical properties at elevated temperatures
- Linear expansion coefficient, α:
- temperature of 100℃ 13.0 ⋅ 10-6 ⋅ K-1
- temperature of 200℃ 13.5 ⋅ 10-6 ⋅ K-1
- temperature of 300℃ 14.0 ⋅ 10-6 ⋅ K-1
- Modulus of elasticity, E:
- temperature of 100℃ 194 GPa
- temperature of 200℃ 186 GPa
- temperature of 300℃ 180 GPa
- Yield strength, Rp0,2:
- temperature of 100℃: > 330 MPa
- temperature of 150℃: > 300 MPa
- temperature of 200℃: > 280 MPa
- temperature of 250℃: > 265 MPa
Heat treatment of steel 1.4362, X2CrNiN23-4:
- Saturation at 1000 +/-50℃
- Forging and rolling at 1000 - 1200℃
In the above mentioned grades the company provides:
Other designations of Duplex 1.4362 grade:
Enhanced duplex 2304, EDX 2304, UNS S32304, 022Cr23Ni4MoCuN, 00Cr23Ni4N, S23043, SAF 2304, SIS 2304, uranus 35n, Z 3 CN 23-04 Az, Z3CN23-04AZ, VLX 534, J-2304, 3RD11, Duplex F68, SAE 2304, UNS S39230.