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Categories | Alloy Steel Metal |
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Brand Name: | TISCO BAOSTEEL HAOSTEEL |
Model Number: | 904L |
Certification: | SGS, BV, CCIC |
Place of Origin: | China |
MOQ: | Negotiation |
Price: | Negotiation |
Payment Terms: | L/C, T/T, Western Union |
Supply Ability: | 20000 Tons per Month |
Delivery Time: | 5-10 Woking Days |
Packaging Details: | Standard Export Packing |
Product: | Stainless Steel Plate |
Standard: | ASTM A240 / A240M-14 |
Grade: | 304,304L,316, 316L, 316Ti, 321, 310S,904Letc. |
Delivery: | Hot Rolled, Annealed and Pickled |
Surface: | No.1, HL, No.4, Sand Blasting |
Tolerance: | ASTM A480 / A480M-14 |
Thickness: | 3~200mm |
Width: | Max 2.5m |
Length: | Max 15m |
Company Info. |
Shanghai Haosteel Co., Limited |
Verified Supplier |
View Contact Details |
Product List |
904L N08904 1.4539 alloy stainless steel plate
Description:
Grade 904L is a non-stabilised low carbon high alloy austenitic
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 / 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 performed well can now be fulfilled
at lower cost by duplex stainless steel 2205 (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 high chloride environments. High nickel content
results in a much better resistance to stress corrosion cracking
than the standard austenitic grades. Copper adds resistance to
sulphuric and other reducing acids, particularly in the very
aggressive "mid concentration" range.
In most environments 904L has a corrosion performance intermediate
between the standard austenitic 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 critical
environments the steelhould be solution treated after cold
work.Consult Steel Technical Assistance for specific environmental
recommendations.
Standard:
Product | ASTM |
Alloy Bar, Rod | B408 , B581 |
Alloy Thick Plate, Thin Sheet, Coil Strip | A240 , A 480 , B409 , B582 , B906 |
Alloy Seamless Tube and Pipe Fittings | B407, B622 , B829 |
Alloy Welded Normal Bore Pipe ANSI | B514 , B619 , B775 |
Alloy Welded Pipe | B515 , B626 , B751 |
Alloy Welded Pipe Fittings | B366 |
Alloy Forged or rolled pipe flange and forged | B462 , B 564 |
Alloy Forged or rolled billet | B472 |
Specified Properties
These properties are specified for flat rolled product (plate,
sheet and coil) in ASTM A240M. Similar but not necessarily
identical properties are specified for other products such as pipe,
tube and bar in their respective specifications.
Composition Specification (%)
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 alloyed grades
suffers from structural instability (precipitation of brittle
phases 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 taken 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
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 grades optimised for machinability. Grade
904L can however be machined using standard techniques.
Bending to a small radius is readily carried out. In most cases
this is performed cold. Subsequent 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 processing. Components in gas scrubbing plants. Seawater
cooling equipment. Oil refinery components. Wires in electrostatic
precipitators.
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