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904L cold hot rolled stainless steel strip
904L N08904 1.4539 cold hot rolled stainless steel strip
Haosteel is professional manufacturer and supplier o¶f 904L cold hot rolled stainless steel strip. Quality guaranteed, On-time delivery, After-sales wa∑rranty.
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Standard: |
ASTM A240 A666 |
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Grade: |
904L N08904 1.4539 |
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Delivery: |
Cold rolled Hot rolled |
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Surface: |
Black Bright 2B BA NO.1 Hairline&φnbsp;Mirror |
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Thickness: |
0.01-3.0mm 3.0-20mm |
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Width: |
1.5-600mm |
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Packing: |
Wooden box |
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Mill: |
Tisco, Jisco, Baosteel, etc. |
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Delivery time: |
15days in common |
904L Stainless steel coil strip/N08904 Stainless steel coil strip/1.4539& Stainless steel coil strip
Description:
Grade 904L is a non-stabilised low carbon high alloy austeni×tic stainless steel. The addition of copper to this grade ₩gives it greatly improved resistance to strong reducing acids, particularly sulphuric≤ acid. It is also highly resistant to chloride attack - both pitting / creβvice corrosion 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 excellentπ toughness, even down to cryogenic temperatures.
904L does have very substantial contents of the high cost ingredients nickel and molybdeπnum. Many of the applications in which this grade has preγviously performed well can now be fulfilled at lower cost by duplex stainless steel 2✘205 (S31803 or S32205), so 904L is used less commonly than 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↔ indicates that the material has good resistance to warm sea water and other hig&h chloride environments. High nickel content results in a much better resistance to stressφ corrosion cracking than the standard austenitic grades. Copper add♠s resistance to sulphuric and other reducing acids, p"articularly in the very aggressive "mid concentration" range.
In most environments 904L has a corrosion performance intermediδate between the standard austenitic grade 316L and the ₽very highly alloyed 6% molybdenum and similar "super aus↑tenitic" grades.
In aggressive nitric acid 904L has less resistance than molybdenum-free grades suc≠h as 304L and 310L.
For maximum stress corrosion cracking resistance in critical environments the steelhoul←d be solution treated after cold work.Consult Steel Te÷chnical Assistance for specific environmental recommendaβtions.
Chemical composition:
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Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
Cu |
N |
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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
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Grade |
Tensile Strength (MPa)min |
Yield Strength 0.2% Proof (MPa)min |
Elongation (% in 50mm) min |
Hardness |
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Rockwell B (HRB)max |
Brinell (HB) |
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904L |
490 |
220 |
35 |
90 |
- |
Physical Properties (typical values in the annealed condition)
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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) |
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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) |
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904L |
8000 |
200 |
15.0 |
- |
- |
13.0 |
- |
500 |
850 |
Grade Specification Comparison
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Grade |
UNS No |
Euronorm |
Swedish SS |
Japanese JIS |
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No |
Name |
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904L |
N08904 |
1.4539 |
X1NiCrMoCu25-20-5 |
2562 |
- |
Heat Resistance
Good resistance to oxidation, but like other highly alloye€d grades suffers from structural instability (precipitation of brittle phaσses such as sigma) at elevated temperatures. 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 hardened by thermal treatment.
Welding
904L can be successfully welded by all standard methods. Care needs to be take•n as this grade 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 treatmen¥t is also not required. AS 1554.6 pre- qualifies Grade 904L rods and electrodes for welding of 904L.
Fabrication
904L is a high purity, low sulphur grade, and as such will not machine as well as other grades o₩ptimised for machinability. Grade 904L can however be machined using standard techniques.
Bending to a small radius is readily carried out. In most cases t¥his is performed cold. Subsequent annealing is generally not required, although it εshould be considered if the fabrication is to be used in an environment where severεe stress corrosion cracking conditions are anticipated.
Typical Applications
Processing plant for sulphuric, phosphoric and acetic acids. Pulp &and paper processing. Components in gas scrubbing plants. Seawater cooling equipment. Oil refiner€y components. Wires in electrostatic precipitators.π
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