Tinned Steel Coil is commonly known as tinplate, and its scientific name is electroplated tinned thin steel sheet. Tinplate coil is composed of five layers: steel base, tin-iron alloy layer, tin layer, oxide film and oil film.
For tinplate supplied in coils, it is impossible for the producer to remove the parts that do not meet the grade I standard, and they can only be sorted out when the user cuts them. However, the producer should improve the surface quality through quality control and online inspection to ensure that at least 90% of the Jiacheng Tinned Steel Coils meet the requirements of grade I tinplate thin steel sheet after cutting.
Tinned Steel Coil packaging is divided into box iron and coil iron. The total number of sheets in a packaging unit is used as the basis for purchase and complaint of box iron, and the total weight of a packaging unit is used as the basis for purchase and complaint of tinplate coil iron.
Especially suitable for deep-processed cans that require flexibility
T－2
53±3
Suitable for deep-processed cans that require general flexibility
T-2.5
55±3
Suitable for can bodies or can lids that require good flexibility
T-3
57±3
Suitable for can bodies and lids that require high hardness
T-3.5
59±3
Suitable for general cans that require good toughness
T-4
61±3
Suitable for general cans that require greater toughness
T-5
65±3
Suitable for large cans that require excellent bending resistance and can bodies or lids of internal pressure containers
DR-8
73
Suitable for can bodies and lids that require certain rigidity and strength
DR-9
76
Suitable for can bodies and lids that require certain rigidity and strength and can bodies of DrD cans
DR-9M
77
Suitable for lids of beer and carbonated beverages that require certain rigidity and strength
DR-10
80
Suitable for high-end bottle caps that require certain rigidity and strength
Tinned Steel Coil is commonly known as tinplate, and its scientific name is electroplated tin steel sheet. Tinplate coil is composed of five layers: steel base, tin-iron alloy layer, tin layer, oxide film and oil film.
Grade I Tinned Steel Coil
The electroplated tinplate that has been inspected online is suitable for regular painting and printing on the entire steel plate surface under normal storage conditions, and shall not have the following defects:
a) Pinholes that penetrate the thickness of the steel plate;
b) Thickness deviations that exceed the standard;
c) Surface defects such as scars, pits, wrinkles, rust, and abrasion black spots that affect use;
d) Shape defects that affect use
Grade II Tinned Steel Coil
The surface quality is lower than that of grade I Tinned Steel Coil. It is allowed to have small-area obvious surface defects or shape defects such as impurities, wrinkles, scratches, oil stains, indentations, burrs, and burn points. It is not guaranteed that the entire steel plate can be painted and printed conventionally.
For tinplate supplied in coils, the producer cannot remove the parts that do not meet the Grade I standard, and can only sort them out when the user cuts them. However, the producer should improve the surface quality through quality control and online inspection to ensure that at least 90% of the Jiacheng tinplate coils meet the requirements of Grade I tinplate thin steel sheets after cutting.
Tinplate packaging is divided into box iron and coil iron. The total number of sheets in a packaging unit is used as the basis for purchase and complaint of box iron, and the total weight of a packaging unit is used as the basis for purchase and complaint of tinplate coil iron.
Tinplate coils are classified according to annealing methods (annealing methods are divided into box annealing and continuous annealing)
Box annealed Tinned Steel Coil
Box annealed tinplate is tinplate that is annealed in the state of steel coil after cold rolling. It has the following characteristics: it can produce tinplate with soft quality and good processing performance, with small crystallization directionality, and is suitable for processing.
Continuously annealed Tinned Steel Coil
Continuously annealed tinplate is tinplate that is continuously heat-treated and annealed after cold rolling. It has the following characteristics: due to its high tempering degree, the thickness of the tinplate can be saved; the material is uniform and it is also suitable for high-speed can making.
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