2304 stainless steel is developed in Sweden, a low-alloy duplex stainless steel, it solution treatment temperature of about 1000 ℃, 40% -50% of the organization of ferrite and 50% -60% austenite, duplex stainless steel with common Characteristics, as a high-strength and low-cost features, can replace 304L and 316L commonly used austenitic stainless steel and the development of steel.
2304 stainless steel for the production of stoves and pressure vessels, chemical plants and refineries pipeline.
2304 Chemical composition（%）:
UNS 2304 grades
C ≤ 0.030,
Si ≤ 1.0,
Mn ≤ 2.5,
S ≤ 0.030,
P ≤ 0.040,
Cr: 21.5 - 24.5,
Ni: 3.0 to 5.5,
Mo: 0.05 - 0.6,
N: 0.05 - 0.20,
Cu: 0.05 - 0.6
| Grade |
Steel varieties |
Temperature ℃ |
σb/MPa |
σ0.2/MPa |
δ5/% |
|
2304 stainless steel |
Steel tube |
Temperature |
≥690 |
≥450 |
≥25 |
|
Steel plate |
Temperature |
≥600 |
≥400 |
≥25 |
|
|
50℃ |
600 |
370 |
—— |
||
|
100℃ |
570 |
330 |
—— |
||
|
200℃ |
530 |
290 |
—— |
||
|
300℃ |
500 |
260 |
—— |
2304 Duplex stainless steel PRE value, and 316L stainless steel equivalent value. CPT value higher than 304L, and 316L quite. 2304 dual-phase steel has good resistance to intergranular corrosion in the nitric acid has good corrosion resistance, comparable with the 304L, in other acids, such as sulfuric acid, sulfuric acid, Its corrosion resistance with 316L rather, and in organic acids, such as formic acid, and even better than 316L.
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