Alloy 904L is a very low carbon containing high alloy austenitic stainless steel. The steel designed for the harsh corrosion conditions. 904L has been standardized in many countries now, and have already been approved in the manufacture of pressure vessels. 904L alloy with the same used as CrNi austenitic steel, has a good resistance to pitting and crevice corrosion capabilities, very high stress corrosion cracking capacity, good intergranular corrosion resistance property, good processability and Solderability.
Alloy 904L Trade Name: 904L;UNS N08904;F904L;W.Nr1.4539;AFNOR Z2CNDU 25-20; VLX904; AL 904L; Cronifer 1925 LC; EN number 1.4539; EN name X1NiCrMoCu25-20-5; DIN X1 NiCrMoCu25 20 5; BS 904S13;
Alloy 904L Chemical composition:
Alloy 904L Physical properties:
Alloy 904L mechanical properties in the room temperature:
Alloy 904L Specificaiton:
ASTM B625, ASTM B649, ASTM B673, ASTM B674, ASTM B677, DIN 1.4539, ASTM A213, ASTM A269, ASTM A312, BS EN 10216 pt.5
Alloy 904L Applications Fileds:
1. Petroleum, petrochemical equipment, such as the reactor in petrochemical equipment.
2. Sulfuric acid storage and transportation equipment, such as heat exchanger.
3. Power plant flue gas desulphurization equipment, the main parts: the absorption tower, flue , stopping plate, internal part, spray system.
4. The scrubber and the fans in the organic acid treatment system.