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904L hot rolled stainless steel plate
904L hot rolled stainless steel plate
Haosteel is professional manufacturer and supplier o≤f 904L hot rolled stainless steel plate. Quality guaranteed, On-tiδme delivery, After-sales warranty.
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Standard: |
ASTM A240 A666 |
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Grade: |
904L |
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Delivery: |
Cold rolled Hot rolled |
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Surface: |
Black/Bright/2B/BA/ NO.1/Hairline/Mirror |
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Thickness: |
0.02mm-3mm,3mm-200mm |
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Width: |
1m-3m |
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Length: |
2m-12m |
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Mill: |
Tisco, Jisco, Baosteel, etc. |
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Delivery time: |
15days in common |
904L Stainless steel plate sheet/N08904 Stainless steel plate sheet/1.4539 Stainless© steel plate sheet
Description:
Grade 904L is a non-stabilised low carbon high alloy austenitic stainless steel. The adπdition of copper to this grade gives it greatly improved resistance to strong reducing acids, parγticularly sulphuric acid. It is also highly resistant to chloride attack - both pitting /£ crevice 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 excellent toughness, even down to cryogenic temperatures.
904L does have very substantial contents of the high cost ingredients ¶nickel and molybdenum. Many of the applications in which this grade has previously peσrformed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S3180>3 or S32205), so 904L is used less commonly than in the past.
Corrosion Resistance
Although originally developed for its resistance to sulphuric a&cid 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♣ high chloride environments. High nickel content results in a much better resistance to stress corrosion cracking than the standard austenitic grades. Copper adds resis♠tance to sulphuric and other reducing acids, particularly i÷n the very aggressive "mid concentration" range.
In most environments 904L has a corrosion performance intermediate between the standard austenitic σgrade 316L and the very highly alloyed 6% molybdenum δand 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 critical environments the >steelhould be solution treated after cold work.Consult Steel Technical Assist→ance for specific environmental recommendations.
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 alloyed δgrades suffers from structural instability (precipitation of brittle phases such as sigma) ±at elevated temperatures. It should not be used abφove 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 taken as this g∞rade solidifies fully austenitic, so is susceptible to hot crac∏king, particularly in constrained weldments. No pre-heat sho™uld be used and in most cases post weld heat treatment 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 gr≤ades optimised for machinability. Grade 904L can however be machined u♥sing standard techniques.
Bending to a small radius is readily carried out. In most cases this is performed cold.γ Subsequent annealing is generally not required, although it should be considered if the fabr✔ication is to be used in an environment where severe stress corrosion cracking conditions a↔re anticipated.
Typical Applications
Processing plant for sulphuric, phosphoric and acetic acids. ₽Pulp and paper processing. Components in gas scrubbing plants. Seawater cooling equipm"ent. Oil refinery components. Wires in electrostatic precipitators.
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