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Processing Inox 304L Sheet
China 304L Stainless Sheet
Type 304L Sheet
Grade 304L Sheet
Grade: AISI 304L, ASTM A240
Surface Finish: 2B, 2D, BA, NO.4, 8K mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc
Technique: Cold Rolled .
Thickness: 0.15mm-3.00mm (Cold Rolled sheets) .
Width: 1000mm, 1219mm, 1250mm, 1500mm, 1800mm, 2000mm .
Length: 2000mm, 2440mm, 2500mm, 3000mm, 6000mm or as customers’ requirement .
Package: Anti-water paper wrapped,Wooden pallets,Wooden boxes etc.required.
Lead Time: 7 to 25 working days after the receipt of 30% deposit .
Form: Perforated Sheet, Chequered Plate, Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Strip, Flats etc.
Value Added Service: Polish, Rolling, Cutting, Bending, Forging, Cladding, Heat Treatment, Annealed, Pickling, Minor Fabrication Etc.
Characteristics of steel grade AISI 304L / SS 304L :
INOX 304L is a corrosion resistant stainless steel. It is distinguished by high resistance to intergranular corrosion at high temperatures (up to 500°C) and excellent resistance in most aggressive environments.
Chemical composition in % steel AISI 304L :
The amount of carbon in the AISI 304L steel composition is lower than in AISI 304, so the ability to resist intergranular corrosion in welds and slow cooling zones is better in AISI 304L.
Mechanical properties of INOX 304L material :
Closest equivalents (analogues) INOX 304L :
Applied Standards and Approvals :
AMS 5511
ASTM A 240
ASTM A666
MIL-S-4043
Scope of application :
AISI 304L stainless steel is recommended for use in cases where materials require strong welding. Also stainless steel 304L is used:
in mechanical engineering and automotive industry;
in food and chemical industry;
in medicine and pharmaceuticals;
in architecture and construction;
in the production of products for work in nitric acid environments at high temperatures;
in welded structures;
in pipelines and boilers.
Main characteristics :
good overall corrosion resistance
very good protection against MKK
suitability for cryogenic applications
excellent weldability
Corrosion resistance :
INOX 304 L has good overall wet corrosion resistance and is particularly recommended where there is a risk of intergranular corrosion.
INOX 304 L has good resistance to most foodstuffs and numerous chemical media:
dilute alkaline solutions at ambient temperature,
dilute organic acids at ambient temperature,
neutral or alkaline salt solutions without halogen compound,
most organic environments.
Intergranular corrosion :
The reason for the insecurity of austenitic stainless steels in the temperature range of 425°C - 820°C is the deposition of chromium carbides at the grain boundaries. Such steels "sensitize" and become susceptible to intergranular corrosion in aggressive environments.
That is why AISI 304L steel with a low carbon content is preferred for products in which the material is exposed to aggressive environments after welding. "Low carbon" increases the time required for the deposition of "harmful" chromium carbides, but does not stop the reaction of their deposition for a long time in a given temperature range.
Cracking (Cracking Corrosion) under stress :
Of all the austenitic stainless steel grades AISI 302, AISI 304, AISI 304L are the most susceptible to stress corrosion cracking (SCC) in halide stress due to their relatively low nickel content.
Causes of SCC:
the presence of halide ions (generally chlorides),
residual tensile stresses,
temperatures over 50°C.
Stresses can arise due to deformation of the alloy in the cold state during forming, or rotational drawing, or during welding, due to stress from changing thermal cycles. Stress levels can be reduced by annealing or heat treatment after cold deformation.
Welding :
Stainless steel 304 L / SS 304 L is easy to weld with standard methods. It is not necessary to heat treat the steel after welding. Welds are cleaned of scale and passivated.
Treatment :
Annealing : at 1050℃-1075℃; cooling - in air or in water.
Vacation : at a temperature of 400-600℃ for 1 hour with a low risk of sensitization.
Passivation : 20-25% HNO3 solution at 20℃.
Surface cleaning : solution of nitric acid and hydrofluoric/hydrofluoric acid in proportions: 10% HNO3 + 2% HF at room temperature or 60℃. Sulfuric acid solution in proportions: 10% H2SO4 + 0.5% HNO3) at 60℃.
Hot working : initial temperature–1150-1260℃; final - 900-925 ℃.
Cold working : 304L steel is ductile, resilient and easy to form by stretching, bending, deep drawing and rotary drawing.
Our experienced machinists, welders and technicians, modern facilities and fabrication technology enable us to provide you with the following custom fabrication services and beyond.
Machining services:
Equipped with CNC lathes and mills, our production team can provide you with a single, customized piece, or a full production run. We will gladly and accurately machine all types of materials to your specification.
Cutting /Sawing Services:
Whatever shape, size or density of your material, we will custom-cut to any length you require.
Custom Bending:
We provide custom bending services for Industrial and Sanitary Applications. E-mail with degree of bend and centerline radius.
Welding:
We offer precision welding of various materials with guaranteed strength and durability.
Threading:
Whether it’s a whole or piece of pipe, a fitting or an end, we can custom thread to your specifications.
Custom Fabrications:
We pride ourselves in meeting your custom fabrication needs. Please let us know what we can do for you.