Classification of steel plate:
1. Classification by thickness :(1) thin plate (2) medium plate (3) thick plate (4) extra-thick plate

2, according to the production method classification :(1) hot rolled steel plate (2) cold rolled steel plate

3, according to the surface characteristics of classification :(1) galvanized sheet (hot galvanized sheet, galvanized sheet) (2) tin plate (3) composite steel plate (4) color coated plate

4. Classified by use :(1) bridge steel plate (2) boiler steel plate (3) shipbuilding steel plate (4) armored steel plate (5) automobile steel plate (6) roofing steel plate (7) structural steel plate (8) electrical steel plate (silicon steel sheet) (9) spring steel plate (10) heat-resistant steel plate (11) alloy steel plate (12) others

Short for plain carbon structural steel.

Is a large category of steel, including: Q235, SS400, A36, SM400, ST37-2 and so on.

The standards applied vary depending on the name of the country.

Plain plate includes cold rolled plate and hot rolled plate

The thickness of cold-rolled sheet is generally less than 2mm

Hot rolled plate 2 mm to 12 mm

Galvanized sheet refers to a steel plate coated with zinc. Galvanizing is an economical and effective anticorrosion method often used. About half of the world's zinc production is used in this process

A,
Galvanized steel plate is to prevent the surface of the steel plate from being corroded to prolong its service life, coated with a layer of metal zinc on the surface of the steel plate, this coated steel plate is called galvanized plate.

Second, the classification of

According to the production and processing methods can be divided into the following categories:

Hot dip galvanized steel plate. A sheet of steel is dipped into a molten zinc bath so that it adheres to a sheet of zinc on its surface. At present, the continuous galvanizing process is mainly used for production, that is, the steel plate into a roll of continuous immersion in the melting of zinc plating tank made of galvanized steel plate;

② Alloyed galvanized steel plate. This steel plate is also made by hot dip, but immediately after the trough, it is heated to about 500℃, so that it generates an alloy film of zinc and iron. This galvanized sheet has good coating tightness and weldability;

③ Electric galvanized steel plate. The production of galvanized steel plate by electroplating has good machinability. But the coating is thin, corrosion resistance is not as good as hot dip galvanized sheet;

④ Single-sided plating and double-sided difference galvanized steel plate. Single-sided galvanized steel, that is, galvanized only on one side of the product. In welding, coating, rust treatment, processing and other aspects, it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of single side not coated with zinc, and a galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided difference galvanized sheet;

Alloy, composite galvanized steel plate. It is made of zinc and other metals such as lead, zinc alloy or composite plated steel plate. This steel plate has excellent anti-rust performance and good coating performance;

In addition to the above five, there are color galvanized steel, printing coated galvanized steel, PVC laminated galvanized steel and so on. But the most commonly used is still hot dip galvanized sheet.