UNS NO8904, commonly known as 904L, is a low carbon high alloy austenitic stainless steel .904L is an austenitic stainless steel designed for moderate to high corrosion resistance. Its low carbon content improves cleanliness and weld strength. Utility scrubber assemblies, acid and fertilizer production equipment.
Composition ranges of grade 904L stainless steels
Grade |
C
|
Mn
|
Si
|
P
|
S
|
Cr
|
Mo
|
Ni
|
Cu
| |
904L
|
min.
max. |
-
0.02 |
-
2 |
-
1 |
-
0.045 |
-
0.035 |
19
23 |
4
5 |
23
28 |
1
2 |
Mechanical properties of grade 904L stainless steels
Grade |
Tensile Strength (MPa) min
|
Yield Strength 0.2% Proof (MPa) min
|
Elongation (% in 50mm) min
|
Hardness
| |
Rockwell B (HR B)
|
Brinell (HB)
| ||||
904L
|
490
|
220
|
36
|
70-90 typical
|
150
|
Pulp and paper processing industries
Wiring in electrostatic precipitators
Oil refinery components
Seawater cooling devices
Gas scrubbing plant
Oil refinery components
Seawater cooling devices
Gas scrubbing plant
DESIGN FEATURES of grade 904L stainless steels
1,Good resistance to pitting and crevice corrosion.
2,Very good resistance to stress corrosion cracking.
3, Maximum service temperatures of 450 deg.C. (824 deg.F).
2,Very good resistance to stress corrosion cracking.
3, Maximum service temperatures of 450 deg.C. (824 deg.F).
Heat Resistance
Grade 904L stainless steels offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures.
Grade 904L stainless steels can be solution heat-treated at 1090 to 1175°C, following by rapid cooling.
Welding
Welding of grade 904L stainless steels can be performed using all conventional methods. This grade does not require pre-heat and post-weld heat treatments.
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learn more：http://construction-steel.com/News/904-L-Stainless-Steel-Composition-Ranges.html
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