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904L Stainless Steel Plate

904L Stainless Steel Plate

904L super austenitic stainless steel is low carbon high nickel, it belongs to molybdenum austenitic stainless steel and its activation passivation change ability is good. Also, its corrosion resistance is excellent in acetic acid, formic acid and phosphoric acid. ASTM B625 is a standard...

Process
Raw materials are sent to hot rolling mills for rolling into different sizes
The hot rolled material is annealed in cold rolling; a rolling annealing furnace and pickling pickling.
All rolls are ground on a precision grinder and appropriately chamfered after the first quilting.
All paper is pickled in different tanks and dried on a brush roller before being sent.
The panels are annealed again and sent to a straightener for straightening.
Inspections are carried out at different stages. Rolling, annealing and pickling through our experienced staff to maintain proper control of the entire internal process.

Chemical composition(WT%)

(C) :≤0.02

(Si) :≤1.00

(Mn) :≤2.00

(P) :≤0.045

(S) :≤0.035

(Cr) :19.0 to 23.0

(Ni) : 23 to 28

(Cu) : 1 to 2

(Mo) : 4 to 5

Applications

Architectural decoration, luxury doors, elevators decorating, metal tank shell, ship building,decorated inside the train, as well as outdoor works, advertising nameplate, the ceiling and cabinets, aisle panels, screen, the tunnel project, hotels, guest houses, entertainment place,kitchen equipment, light industrial and so on.    

Surface quality inspection

The quality of the surface of 304 stainless steel is mainly determined by the pickling process after heat treatment. If the surface oxide scale formed by the previous heat treatment process is thick or the structure is uneven, pickling with water does not improve the surface finish and uniformity. Therefore, it is necessary to pay full attention to the heat treatment or the surface cleaning before heat treatment.

If the surface oxide thickness of the stainless steel plate is not uniform, the surface roughness of the base metal under the thick place and the thin place is also different, and the surface oxide of the surface and the surface of the oxide deposit is soaked by the acid when the surface is pickled. Different, so the surface of the steel plate is not uniform. Therefore, when heat-treated by heat treatment, it is necessary to uniformly form scale.


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