Austenitic SS 904L Round Bar
Stainless Steel 904L Round Bar are high purity steels with low sulphur content and also non-stabilized austenitic stainless steel with low carbon content. Alloy 904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments.
CHEMICAL PROPERTIES
|
GRADE |
Cr |
Ni |
Mo |
Mn |
Si |
P |
Cu |
S |
C |
N |
Fe |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
SS 904L |
Min |
19 |
23 |
4 |
– |
– |
– |
1 |
– |
– |
– |
– |
|
Max |
23 |
28 |
5 |
2 |
1 |
0.045 |
2 |
0.03 |
0.02 |
0.1 |
BALANCE |
Properties
SS 904L Bar with its high alloying element gives the alloy exceptional good resistance to uniform corrosion. The higher performance austenitic stainless steels such as 904L have very good resistance to SSC.
Physical Properties
|
Grade |
Density (g/cm3) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Melting Range |
Specific Heat (J/Kg.K) |
Electrical Resistivity (Ω mm2/m) |
|---|---|---|---|---|---|---|---|
|
20-100°C |
at 100°C |
0-100°C |
at 20°C |
||||
SS 904L |
8 |
190 |
15.3 |
12.9 |
1300-1390 |
450 |
1 |
904L Bar can be easily welded and processed by standard fabrication process. 904L is quite ductile and forms easily. The addition of molybdenum and nitrogen implies more powerful processing equipment may be necessary when compared with the standard 304/304L grades.
SS 904L Round Bar has proven to be a good alternative to most conventional stainless steels. Conventional stainless steels such as 304L and 316L are susceptible to chloride stress corrosion cracking (SSC) under certain conditions.
Specification
The Specification for Wrought SS 904L Round Bar as per astm Standard is ASTM A276/ASME SA-276, they are categorised into different form and shape such as SS 904L Round Bar, Rod, Channel Bar, T-Bar, Flat Bar, Blocks, Square, bar, Triangle, Threaded, Hex (A/F), Profiles, Half Ingot, Billet, I/H Bar, etc.
When considering wrought stainless round bars, material shall be furnished in the following way such as Hot-worked, Hot-worked and Annealed, Hot-worked- Annealed and cold worked or Hot-worked-Annealed and heat treated.
904L Bar depending upon their treatment and their use and application they can also be available in different surface finishes such as Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish, 2B, 2D, etc.
Application
SS 904L Bars are utilized in multiple industrial needs, together with – Chemical Industries, Oil & Gas, Aerospace, organic compound, power station, Pulp & Paper, Environmental, Water comes & Engineering.
