Grade 904L Stainless Steel Sheet
904L(1.4539) STAINLESS STEEL
904L is an austenitic stainless steel.In comparison to 316L, its molybdenum addition gives it superior resistance to localized attack (pitting and crevice corrosion) by chlorides and greater resistance reducing acids and in particular its copper addition gives it useful corrosion resistance to all concentrations of sulphuric acid. Its high alloying content also gives it greater resistance to chloride stress corrosion cracking, but it is still susceptible. Its low carbon content makes it resistant to sensitization by welding and which prevents intergranular corrosion.
CHEMICAL COMPOSITION
Element |
Cu |
Mn |
Cr |
Ni |
P |
S |
Si |
904L |
1.0~2.0% |
2.00% |
19.0~23.0% |
23.0~28.0% |
0.045% |
0.035% |
1.00% |
MECHANICAL PROPERTIES
Grade |
Tensile Strength
(MPa)
Min
|
Yield Strength
0.2% proof (MPa)
Min
|
Elongation
(%in 50mm)
Min
|
Rockwell B(HRB)
|
904L |
490
|
220 |
36 |
70~90 |
904L COMMON APPLICATIONS
The typical applications of grade 904L stainless steels are listed below:
- Wiring in electrostatic precipitators.
- Oil refinery components.
- Seawater cooling devices.
- Gas scrubbing plants.
- Pulp and paper processing industries.
- Acetic, phosphoric and sulphuric acid processing plants.