Duplex Stainless steel SAF2304 forged flange ring is a very popular spare part in many fields , it will choose excellent stainless steel raw material and be forged.

Stainless steel flange ring application :

Chemical industry: Stainless steel flanges play a key role in the connection of equipment such as chemical reaction vessels and storage tanks, ensuring the sealing and stability of the equipment

Petroleum industry: In scenarios such as oil wells and pipelines, stainless steel flanges ensure smooth transportation of oil while withstanding high temperature and high pressure environments

 Power industry:  stainless steel flanges are required to withstand high temperatures and pressures in critical areas such as turbine bypass systems and nuclear power plant containment isolation to ensure stable system operation

Metallurgical industry: Stainless steel flanges play a connecting and supporting role in smelting equipment, smelting furnaces, and other occasions, withstanding harsh working conditions

SAF2304 chemical specification (SAF2304 , UNS S32304 ,00Cr23Ni4N) :

C ≤ 0.030 、 Si ≤ 1.0 、 Mn ≤ 2.5 、 S ≤ 0.030 、 P ≤ 0.040 、 Cr: 21.5 - 24.5 、 

Ni: 3.0 - 5.5 、 Mo: 0.05 - 0.6 、N: 0.05 - 0.20 、 Cu：0.05 - 0.6

SAF2304 mechanical property and heat treatment 

corrosion resistance

The PRE value of SAF2304 duplex stainless steel is 25, which is equivalent to the value of 316L stainless steel. When we tested the relationship between critical pitting temperature (CPT) and chloride ion content of several steels in NaCl solution at a potential of 300mV, we found that the CPT value of ASF2304 duplex stainless steel was higher than 304L and comparable to 316L. The test results of several steels in a neutral chloride solution for high-pressure reactors showed that the applied stress was equivalent to the yield strength of the steel at that temperature. The test time was 1000 hours, and the area below the curve where stress corrosion cracking did not occur. In addition, SAF2304 duplex steel has good intergranular corrosion resistance and can be tested by the CuSO4+H2SO4 copper chip method. SAF2304 duplex steel has excellent corrosion resistance in nitric acid, comparable to 304L. In other acids such as sulfuric acid, its corrosion resistance is comparable to 316L, while in organic acids such as formic acid, it is even better than 316L.

Welding performance

SAF 2304 stainless steel has good welding performance and does not require heat treatment before welding. Suitable for welding using SMAW, GTAW, GMAW, and SAW methods. When using GTAW welding method, it is necessary to fill the wire and use pure argon or Ar+2% N2 shielding gas.

Process ability

a. The temperature range for hot forming is 1100-950 ℃, followed by quenching treatment after forming.

b. The cold forming method is the same as that of austenitic stainless steel, and it is difficult to deform at the beginning. After reaching the yield limit, the deformation is the same as that of austenitic stainless steel. The deep drawing and cold spinning of SAF 2304 duplex stainless steel are more difficult to form than austenitic stainless steel.

c. Heat treatment solution treatment temperature 950-1050 ℃, rapid cooling. The stress relief annealing temperature is 550-600 ℃.

Its size range following:

1.  max diameter 2500mm

   
   

Delivery condition:

1. Forged + annealing + black surface

2. Forged + annealing + turning  

3. Forged + solution + black surface

4. Forged + solution + turning