Home > News > Content
Use Of Steel Plate
May 28, 2018

1. Medium and thick plate

Definition of medium and thick steel plate:

Thick steel plate is a general term for steel plate with a thickness of more than 4mm. In practical work, steel plate with a thickness of less than 20mm is often referred to as the middle plate with a thickness of > 20mm to

The steel plate of 60mm is called thick plate, while the steel plate with thickness of > 60mm needs to be rolled on a special thick plate mill, so it is called special thick plate. The width of the thick steel plate varies from

0.6 mm to 3.0 mm. The thick plate is also divided into shipbuilding steel plate, bridge steel plate, boiler steel plate, high pressure vessel steel plate, decorative steel plate, automobile steel plate and installation

A steel plate and composite steel plate.

What are the classes of medium and thick steel plates?

Ordinary medium and thick steel plates

As the name implies, the ordinary carbon steel boiling plate is made from the hot rolling steel of the ordinary carbon structural steel. Effervescent steel is an incomplete deoxidized steel

When molten steel is injected into the ingot mould, a large amount of gas is produced by carbon-oxygen reaction, which results in the molten steel being boiling.

The carbon content of fluidized steel is low, and the silicon content of steel is usually less than 0.07% because it is not used to deoxidize ferrosilicon. The outer layer of effervescent steel crystallizes at boiling.

So the surface is pure, dense, the surface quality is good, the processing performance is good. Effervescent steel has no large concentrated shrinkage cavity, less deoxidizer and lower steel cost

. There are many impurities in the core of fluidized steel, serious segregation, uneven mechanical properties, high gas content, low toughness, cold brittleness and aging sensitivity

Large, poor welding performance, so it is not suitable for manufacturing welded structural parts and other important structural parts that bear impact load and work at low temperature.

(1) main USES

The boiling steel plate is widely used to manufacture various stamping parts, construction and engineering structures, as well as some less important machine structures and parts.

Medium thickness steel plate includes:

1. Ordinary carbon steel boiling steel plate

As the name implies, the ordinary carbon steel boiling plate is made from the hot rolling steel of the ordinary carbon structural steel. Effervescent steel is an incomplete deoxidized steel

When molten steel is injected into the ingot mould, a large amount of gas is produced by carbon-oxygen reaction, which results in the molten steel being boiling.

The carbon content of fluidized steel is low, and the silicon content of steel is usually less than 0.07% because it is not used to deoxidize ferrosilicon. The outer layer of effervescent steel crystallizes at boiling.

So the surface is pure, dense, the surface quality is good, the processing performance is good. Effervescent steel has no large concentrated shrinkage cavity, less deoxidizer and lower steel cost

. There are many impurities in the core of fluidized steel, serious segregation, uneven mechanical properties, high gas content, low toughness, cold brittleness and aging sensitivity

Large, poor welding performance, so it is not suitable for manufacturing welded structural parts and other important structural parts that bear impact load and work at low temperature.

(1) main USES

The boiling steel plate is widely used to manufacture various stamping parts, construction and engineering structures, as well as some less important machine structures and parts.

2. Plain carbon steel sedative steel plate

Ordinary carbon - stabilized steel plate is made of carbon - structured steel. Calm steel is fully deoxygenated steel, steel liquid is used before ingot injection

Ferromanganese, ferrosilicon and aluminum are fully deoxygenated, and the molten steel is relatively calm in the ingot mould without boiling, so it is named as calm steel.

The advantage of sedation steel is that the chemical composition is even, so the mechanical properties of all parts are even. but

The surface quality is poor, there are concentrated shrinkage cavity, the cost is high.

(1) main USES

The common sedative steel plate is mainly used for producing components, welded structures and other structures with high strength that bear impact at low temperature.

3. Low alloy structural steel plate

Low alloy structural steel plate is made from low alloy structural steel hot rolling. Low alloy steel plate is composed steel and semi - composed steel plate. Its advantage is high intensity

More performance, can save a lot of steel, reduce structural weight, etc.

(1) main USES

Low - alloy structural steel plate is more and more widely used in mechanical manufacturing and metal structural parts.

4. Hot continuous rolling steel plate for general structure

1) main purpose

It is mainly used for general structures such as buildings, Bridges and vehicles.

5. Weather resistant steel plate for welding structure

Weather resistant steel is atmospheric corrosion resistant steel. Weather-resistant steel for welding structure is to add a small amount of alloy elements to steel, such as steel, chromium, nickel, molybdenum, niobium, titanium,

Zirconium and vanadium are used to form a protective layer on the surface of metal matrix to improve the weather resistance of steel and good welding performance.

(1) main USES

Mainly used for Bridges, buildings and other structures.

6. High weatherability structural steel plate

Weather-resistant steel is an atmospheric corrosion resistant economy. A small amount of alloy elements, such as steel, phosphorus, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, are added to the steel to make the metal

The protective layer formed on the surface of matrix enhances the weatherability of steel.

(1) main USES

It is mainly applicable to buildings, vehicles, towers and other structural parts.

7. Patterned steel plate

Patterned steel plate is the steel plate with diamond or lentil shaped protrusion on its surface. The specification is expressed by its own thickness (not counting the thickness of the edge).

(1) main USES

Decorative panels have anti-skid effects, commonly used as floor, escalator, work frame pedals, ship deck and car floor.

8. Steel plate for bridge

Bridge steel plate is specially used for building railway or highway Bridges. High strength, toughness and load and impact of locomotive and vehicle are required

, and must have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. The steel used for tethered bridge welding should also have good welding performance and low welding performance

The notch sensitivity.

(1) main USES

It is mainly used for structural parts of railway Bridges and road Bridges whose span is between 46 and 160mm.

9. Steel plate for hull structure

Steel plate for hull structure is called ship plate for short. Due to the poor working environment of the ship, the hull is subject to chemical corrosion, electrochemical corrosion and Marine organisms

, corrosion of microorganisms; The hull is subjected to large wind and wave impact and alternating load; The shape of the ship complicates its processing methods and other reasons, so on the hull

Structural steel is strictly required. First of all, good toughness is the most critical requirement. In addition, high strength, good corrosion resistance and welding are required

Bonding performance, processing and forming performance and surface quality. In order to ensure quality and enough toughness, the Mn/C of chemical composition is required to be above 2.5, right

Carbon equivalent is also strictly required and produced by steel mills approved by ship inspection authorities.

Structural steel for hull is divided into general thickness and high strength steel, and general strength steel is divided into A, B, C and D grades by mass. The high strength steel is divided into two more

Strength grade and three quality grades; AH32, DH32, EH32, AH36, DH36, EH36.

(1) main USES

Steel plates for the hull, deck, etc of ocean-going, coastal and inland shipping vessels.

10. Boiler steel plate

The boilers are divided into industrial boilers and power station boilers. Industrial boilers are usually used for heating by industrial enterprises and belong to small boilers

The steel used is ordinary carbon structural steel and low alloy structural steel. Power station boilers belong to large and medium-sized boilers, which have special requirements on steel quality and general requirements

Alloy steel with good comprehensive properties is manufactured.

(1) main USES

Mainly used for making fixed boilers, hull boilers and other important boiler accessories.

11. Steel plate for container

The steel plate used for the container is subjected to different pressure and strength because the containers are made. Normal pressure is 31.4MPa or higher; The operating temperature is usually -20

℃ to 450 ℃ between, there are below 20 ℃. According to the working conditions and processing technology of the container, the steel plate used in the container must have good cold bending and bending

Welding performance; Good plasticity and toughness; High temperature short - term strength or long - term strength performance. In order to enable the container to withstand higher pressure, reduce

In addition to high quality carbon steel, most of the containers are made of low alloy structural steel. Container plate division

Carbon steel, low alloy steel, low alloy steel for pressure poor, low alloy steel for multilayer pressure vessel, etc.

(1) main USES

Pressure vessel steel plate is a special plate used in the manufacture of oil, chemical, gas separation, storage and transportation containers or other similar equipment, such as various

Tower containers, heat exchangers, storage tanks, tank trucks, etc.

12. Steel plate for welding cylinder

High quality carbon structural steel and low alloy structural steel are used for welding cylinder steel. Because welding gas is used under certain pressure, so

The control of chemical composition content and mechanical properties is also strict. The plate number of welded cylinder steel is followed by "HP".

To show the difference.

(1) main USES

Steel plates for welding cylinders are mainly used to produce cylinders with low pressure, such as oil cylinders.

13. Composite steel plate

In order to save the amount of stainless steel, some containers and structural parts are made of composite steel plate. Composite steel plate is the common carbon structure

Steel, high quality carbon structural steel and low alloy steel as the matrix (base), on its surface not rust acid - resistant, heat - resistant steel as the surface (compound) bimetal

The plank.

(1) main USES

It is mainly used to manufacture structural parts and containers for acid and alkali resistance, atmosphere and corrosive media.

14. Automobile steel plate

Automobile steel plate is mainly used in the manufacture of automobile girder (longitudinal, beam), frame and other structural parts. The automobile girder not only has to bear the heavy static load, but also

And must bear certain impact, vibration and so on, therefore the steel plate must have certain strength and fatigue resistance performance, and requires good stamping performance and cold bending

Performance, to meet the requirements of cold stamping forming, most of China now USES low-carbon low alloy structural steel as material.

(1) main USES

It is mainly used for making structural parts such as automobile girder and frame.

15. Hot rolled three-layer steel plate for ploughing

A hot-rolled three-layer steel plate used for making a mechanical or livestock - driven plough. Because the plowwall is responsible for cutting, breaking and turning the soil, so

High wear resistance, smooth surface and enough toughness are required. The plowwall is made of three layers of steel plate which is composed of hard outer layer and soft middle layer. A hard outer layer of

The material is no. 65 steel or no. 70-85 steel, and the soft medium is no. Q235 or no. B2 steel.

(1) main USES

A hot-rolled three-layer steel plate used to make the plough wall of a motorized and animal-drawn plow.