Tinplate Coil

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Last update: 2019-02-03 15:42
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The Specification of Electrolytic Tinplate:

The Specifications of Electrolytic Tinplate

Steel Grade

Black Plate

Thickness

Anneal

Temper Grade

Tin Coating

MR / L / DR

Single Reduce /

Double Reduce

0.12-0.55mm

Box Annealing (BA) /

Continuous Annealing (CA)

T1, T1.5, T2, T2.5, T3, T3.5, T4, T5, DR7M, DR8, DR8M, DR9, DR9M, DR10

2.8/2.8, 5.6/5.6

8.4/8.4, 11.2/11.2

5.6/2.8, 8.4/2.8

8.4/5.6, 11.2/2.8

11.2/5.6, 11.2/8.4

15.1/5.6;


The Introduction of Electrolytic Tinplate and Tin Free Steel Product:

Tin mill products include electrolytic tinplate, electrolytic chromium coated steel (also referred to as tin free steel or TFS), and black plate (the uncoated steel). Tinplate is a thin steel sheet coated by tin, while TFS is an electrolytic chrome plated steel consisting of a thin layer of chromium and a layer of chromium oxide deposited on the steel base. Both of them have a beautiful, metallic luster as well as excellent properties in corrosion resistance and paint-ability.


Features of Electrolytic Tinplate and Tin Free Steel Product

Features

Tinplate

TFS

2.8

Over 5.6

Bare Corrosion Resistance (sealed) (1)

Rust Resistance

Acid Resistance

Alkali Resistance

Black Sulfide Stain Resistance

Stress Cracking Resistance

Paintability

Corrosion Resistance after Painting (2)

Filiform Corrosion Resistance

Paint Adhesion

Formabity

Solderability

X

Weldability

△ (3)

Heat Resistance (4)

Note: ◎: excellent ○: good △: fair X: poor

1. Bare corrosion resistance is evaluated under tightly sealed conditions.

2. Corrosion resistance after painting is evaluated by crosshatching corrosion tests.

3. The evaluation is for the case where welding is performed without grinding the surface to remove the metallic coating layer.

4. High-temperature baking after painting and printing may cause changes in material properties.


Applications of Tinplate and TFS

Electrolytic Tinplate and TFS products are widely sold and used throughout the world in application of packaging of food, beverage and industrial goods and enjoy high reputation in the global market.

1. Consumer Packaging and Industrial Packaging

1.1 ETP is primarily used for packaging foodstuffs and beverages, but it is also used in containers for oils, grease, paints, polishes, chemicals and many other products. Aerosol containers and caps and closures are also made from ETP.

1.2 TFS are most frequently used for can tops, screw and lug caps, snap and press-on closures and shallow-drawn food cans.

2.Miscellaneous

2.1 In Electronics - Electrodes, Cable tape, Magnetic screen covers, etc.

2.2 In Engineering - Automotive oil filters, Automotive air filters, Gaskets, etc.

2.3 In Construction - Gas meter internal components, Heat exchangers, cookware, shelving, etc.


Packaging and Marking of Tinplate and TFS

1. Offers coils and sheets, coil packed in a vertical form or a horizontal.

2. A label that indicates the manufacturing history is affixed to the outside of the packaging. In addition, a service card is contained inside.

3. With regard to types of packing and markings, please consult us.


FAQ:

1. What are ETP and TFS's parameters inspected?

A. Mechanical Properties - Hardness (temper grade).

B. Dimensional Accuracy - Thickness, Width and Cut-length.

C. Lubrication - Oil film.

D. Corrosion Resistant Property - Tin coating (for Tinplate), Metallic chromium and chromium in Cr-oxide (for TFS), Passivation film weight, Alloy-tin Couple (for required), Iron solution value (for required), Tin grain size (for required), Corrosion resistance SO2 test (for required), Porosity Test (for required), Pickling lag value (for required).

2. What are different features between TFS and ETP?

A. Appearance - Even when the same surface finish as ETP is applied to the substrate steel sheet, it provides the unique surface luster characteristic of metallic chromium.

B. Corrosion resistance - As it has excellent corrosion resistance after painting, it is generally used with both surfaces painted. It can also be used with the internal surface unpainted, depending on the contents.

C. Solder-ability - TFS is not compatible with soldering.

D. Weld-ability - Although TFS can be welded when the metallic coating layers are removed, its weld-ability is inferior to ETP.

E. Coating weights - Unlike the multiplicity of coating weights with tin, only one standardized chromium-coated product is manufactured.

3. What is available surface finishes of Electrolytic Tinplate and Tin Free Steel?

A. Bright surface (B) - Glazed surface obtained after melting treatment of electro tinned smooth raw material strip with extremely fine stone figures by processing.

B. Stone surface (R) - Glazed surface obtained after melting treatment of electro-tinned raw material strip featuring certain oriented stone figures.

C. Stone rough surface (R2) - Glazed surface obtained after melting treatment of electro-tinned raw material strip featuring certain oriented stone figures, roughness higher than "R".

D. Silver surface (S) - Glazed surface obtained after melting treatment of electro-tinned raw material strip with rough matt surface.

E. Silver rough surface (S2) - Glazed surface obtained after melting treatment of electro-tinned raw material strip with rough matt surface, roughness higher than "S".

F. Matte surface (M) - Matt surface of general matt raw material strip without reflowing treatment.

4. How many types of tin coat weight of ETP?

There are two types of tin coat weight. One is Equally Coated, inside and outside tin coat weight is same, like 2.8/2.8 (g/m2). Another is Differently Coated, inside tin coat weight is NOT SAME as outside tin coat weight, like 2.8/5.6 (g/m2).

5. How to choose tin coating of Electrolytic Tinplate?

The tin coating weight is determined in accordance with specific end use applications. Tinplate with a heavy coating weight is used for making cans that require a high corrosion resistance or those used bare. Tinplate with a light coating weight is used for making cans that do not require so high a corrosion resistance or those used after painting or printing.

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