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904L Stainless Steel Round Bar
904L Stainless Steel Round Bar
Haosteel is professional manufacturer and supplier of 90≈4L Stainless Steel Roun Bar . Quality guaranteed, On-ti₩me delivery, After-sales warranty.
Standard: |
ASTM A276/A484/A582 |
Grade: |
904L |
Delivery: |
Hot rolled, Cold drawn |
Surface: |
Pickled,Black,Bright,Polishing,Grinded |
Diameter: |
1mm-300mm |
Length: |
2m-12m as customer request |
round bar: |
Hot rolled black bar/Acid round barCold drawn bright bar/Polishing round bar |
Mill: |
Tisco, Jisco, Baosteel, etc. |
Delivery time: |
15 days in common |
Description:
904L Stainless steel plate sheet/N08904 Stainless steel plate shee↑t/1.4539 Stainless steel plate sheet
Description:
Grade 904L is a non-stabilised low carbon high alloy ₽austenitic stainless steel. The addition of copper to this grade gives it greatly improveσd resistance to strong reducing acids, particularly sulphuric <acid. It is also highly resistant to chloride attack - both pitting / crevice corrosio♥n and stress corrosion cracking.
This grade is non-magnetic in all conditions and has excellent weldability and →formability. The austenitic structure also gives this grade exc≥ellent toughness, even down to cryogenic temperature's.
904L does have very substantial contents of the high cost ingredients nickel and molybdenum. ™Many of the applications in which this grade has pr•eviously performed well can now be fulfilled at lower cost by duplex sta♥inless steel 2205 (S31803 or S32205), so 904L is used less commonly tha☆n in the past.
Corrosion Resistance
Although originally developed for its resistance to sulphuric ☆acid it also has a very high resistance to a wide range of environments. A PRE of 35 i₽ndicates that the material has good resistance to warm sea water and other high chloride envσironments. High nickel content results in a much better resistance to stre©ss corrosion cracking than the standard austenitic gr¶ades. Copper adds resistance to sulphuric and other reducing acid↔s, particularly in the very aggressive "mid concentration" range.
In most environments 904L has a corrosion performance intermediate between the standard austenλitic grade 316L and the very highly alloyed 6% molybdenum and >similar "super austenitic" grades.
In aggressive nitric acid 904L has less resistance than molybdenum-free grades §such as 304L and 310L.
For maximum stress corrosion cracking resistance in cr itical environments the steelhould be solution treaλted after cold work.Consult Steel Technical Assistance →for specific environmental recommendations.
Chemical composition:
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
Cu |
N |
|
904L |
min. max. |
- 0.020 |
- 2.00 |
- 1.00 |
- 0.045 |
- 0.035 |
19.0 23.0 |
4.0 5.0 |
23.0 28.0 |
1.0 2.0 |
- 0.10 |
Mechanical Property Specification
Grade |
Tensile Strength (MPa)min |
Yield Strength 0.2% Proof (MPa)min |
Elongation (% in 50mm) min |
Hardness |
|
Rockwell B (HRB)max |
Brinell (HB) |
||||
904L |
490 |
220 |
35 |
90 |
- |
Physical Properties (typical values in the annealed condition)
Grade |
Density (kg/m3) |
Elastic Modulus (GPa) |
Mean Coefficient of Thermal Expansion |
Thermal Conductivity |
Specific Heat 0-100°C ( J/kg.K) |
Electrical Resistivity (nW.m) |
|||
0-100°C (mm/m/°C) |
0-315°C |
0-538°C (mm/m/°C) |
at 20°C (W/m.K) |
at 500°C (W/m.K) |
|||||
904L |
8000 |
200 |
15.0 |
- |
- |
13.0 |
- |
500 |
850 |
Grade Specification Comparison
Grade |
UNS No |
Euronorm |
Swedish SS |
Japanese JIS |
|
No |
Name |
||||
904L |
N08904 |
1.4539 |
X1NiCrMoCu25-20-5 |
2562 |
- |
Heat Resistance
Good resistance to oxidation, but like other highly allo∑yed grades suffers from structural instability (precipita€tion of brittle phases such as sigma) at elevated t×emperatures. It should not be used above about 550°C. 904L has design stress values in the ASME Boiler and Pressure Vessel Code to 371°C.
Heat Treatment
Solution Treatment (Annealing) Heat to 1090-1175°C and cool rapidly. This grade cannot be hard ened by thermal treatment.
Welding
904L can be successfully welded by all standard methods. Care needs to be taken as this graαde solidifies fully austenitic, so is susceptible to hot cracking, particularly in constrained÷ weldments. No pre-heat should be used and in most cases post weld heat treatment is also n∑ot required. AS 1554.6 pre- qualifies Grade 904L r ods and electrodes for welding of 904L.
Fabrication
904L is a high purity, low sulphur grade, and as such wil±l not machine as well as other grades optimised for machinability. Grade 90←4L can however be machined using standard techniques.
Bending to a small radius is readily carried out. In most cases this is performed cold. Subs♣equent annealing is generally not required, although it should be ✔considered if the fabrication is to be used in an environment where severe stress★ corrosion cracking conditions are anticipated.
Typical Applications
Processing plant for sulphuric, phosphoric and acetic acids. Pulp and paper processin∏g. Components in gas scrubbing plants. Seawater cooling equipmen≥t. Oil refinery components. Wires in electrostatic precipitators.
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