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Cold Rolled Sheet
General Cold Rolled Sheet Introduction
2022-03-21
mechanical properties of steel
Terminology related to mechanical properties of steel
2022-03-22

Classification of steel plates

Delivery of steel sheets

Before we know the classification of steel plates, let’s understand the meaning and characteristics of steel plates

Steel plate (steel strip) is a kind of rectangular cross-sectional steel with large width to thickness ratio and surface area, usually delivered in sheets called steel plate, also called flat; long length, delivered in rolls called steel strip, also called coiled plate.

 Steel plate has a large covering and accommodating capacity, can be used as roofing panels, thatching materials, as well as the manufacture of containers, storage tanks, packaging boxes, train boxes, automobile shells, industrial furnace shells, etc.; can be cut and combined according to the requirements of use, made into a variety of structural and mechanical parts, but also welded steel, to further expand the scope of use of steel plate; can be bent and stamping molding, made into boilers, containers, punching shells It can be bent and stamped to make boilers, containers, punching shells, civil utensils, appliances, and also used as welded steel pipes and cold-formed steel blanks. Because of the above characteristics, the steel plate has become the most widely used steel in various sectors of the national economy.

Steel plates are delivered in sheets and steel strips in coils. The specification of sheet steel is expressed in millimeters of thickness * width * length. The specification of steel strip is expressed in millimeters of thickness * width *C (coil).

Here is a detailed description of the classification of steel plates

Cold Rolled Sheet

Classification of steel plates

  1.  can be divided according to the thickness, because the thickness of the steel plate is of different sizes, can be divided into thin plate, medium-thick plate and thick plate. The thickness of the thin plate is definitely the thinnest, while the thickness of the thick plate is definitely the thickest.
  2.  can be distinguished according to the surface coating layer, mainly divided into galvanized sheet, plastic composite steel, lead-plated sheet and so on. The use of different steel plates is different, can be combined with the actual situation to choose.
  3.  can be divided according to the production method, mainly divided into hot-rolled and cold-rolled, these two production methods are completely different, so there are certain differences in the performance of the product, according to the actual situation to choose the right product.
  4.  can be divided according to the use, mainly divided into roofing steel, automotive steel, electrical steel, boiler steel and so on, the use of different steel is different, if you want to use the steel used for the kitchen, then you need to buy boiler steel.
Classification of steel plates

Classification of steel plates by thickness

  1.  Classification of steel plates: According to GB/T15574-1995 “Steel Product Classification”, steel plate with thickness less than or equal to 3mm is called thin steel plate (but according to our traditional division, it is generally less than or equal to 4mm).
  2. Thick steel plate: steel plate with thickness greater than 3(4)mm. In practice, the thick steel plate is also called medium-thick steel plate, which is divided into: (1) medium plate: the thickness of 3 (4) -20mm steel plate.
  3. Thick plate: steel plate with thickness of 20-60mm.
  4.  extra thick plate: thickness 60-600mm steel plate (the thickest foreign 700mm).

Classification of steel plates by production and processing method

  1.  Hot rolled steel plate: steel plate rolled after heating (heating temperature above recrystallization temperature, generally above the critical point AC1).
  2.  Cold-rolled steel plate: without heating, at room temperature (strictly speaking, below the recrystallization temperature) rolled steel plate.
  3. Shear edge steel plate: the final width of the steel plate is determined by shearing, the edge of the steel plate is neat and good quality.
  4.  Flanged steel plate: the longitudinal edge of the steel plate is rolled out by the steel plate mill with vertical rolls, and the longitudinal edge is not cut after rolling, and the edge of the steel plate often has cracks and other defects.

Classification of steel plates by the surface condition

  1. Flat (steel) plate: steel plate with flat surface, the majority of steel plates are flat.
  2. Patterned steel plate: steel plate with diamond-shaped, lentil-shaped or round bean-shaped protrusions on the surface.

Classification of steel plates by delivery mode

  1. Flat plate: Steel plate delivered in sheets, due to the straightening machine, the surface is flat, so called, that is, the usual sense of the steel plate.
  2.  Coil: Steel plate delivered in coils. In the production enterprise, it is mostly called strip steel; in the distribution chain, it is often called strip steel. According to the traditional call, there are some subtle differences.
  3.  Coil: generally limited to steel plates with a width greater than 600mm, also known as wide steel strip.
  4. Steel strip: width less than 600mm (generally not more than 300mm), delivered in rolls of steel plate called steel strip, also known as narrow steel strip. In practice, the width of less than 300mm, narrow and long straight steel plate is also known as steel strip. The steel strip cut by broadband steel is also called longitudinal steel strip.
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