Concept and characteristics of unequal thickness tin-plated steel coils

Unequal thickness tin-plated steel coils are tin-plated steel with differences in thickness. The core feature is that the thickness of different areas of the steel coils varies through a specific processing technology, and the surface is covered with a tin layer to improve the anti-corrosion performance. However, the current search results do not directly mention "unequal thickness tin-plated steel coils". However, based on the characteristics of "unequal thickness steel coil processing technology" and "galvanized coils", it can be inferred that this type of steel coil may combine the structural advantages of unequal thickness rolling with the protective properties of the tin coating, and is suitable for scenarios with comprehensive requirements for material strength, formability and corrosion resistance.

Product Parameters

Surface State of Tinplate

Substrate Type

Coating Weight

Chemical Composition

Mechanical Properties & Applications

Reference for the processing technology of unequal thickness steel coils

Core process steps

Taking hot-dip galvanized unequal thickness steel coils as an example, its processing needs to go through two key links: unequal thickness flexible cold rolling and annealing parameter matching:

1. Use cold rolling mill to perform differential rolling on hot-rolled steel coils to form unequal thickness cold-rolled steel coils of target thickness;

2. Through the coordinated control of annealing temperature, time and rolling ratio, ensure that the steel coil has good cold forming ability, and the final yield strength can reach 417~477MPa, and the elongation is 21~31.7%.

Process advantages

Compared with traditional equal-thickness processing, this process can achieve precise control of material thickness, reduce subsequent processing waste, and replace electro-galvanizing with hot-dip galvanizing to shorten the production process, reduce costs, and meet environmental protection requirements

Potential application directions of unequal-thickness tin-plated steel coils

1. Structural lightweight field: such as automobile body parts, achieve a balance between strength and weight reduction through thickness gradient design;

2. Precision manufacturing field: electronic equipment housing or parts, need to take into account both formability and surface corrosion resistance;

3. Special packaging field: replace traditional equal-thickness tin-plated plates, reduce material consumption and improve packaging structure strength