What are the standards for low alloy steel plates?

1. Low alloy structural steel plate (GB3274-88) Low alloy structural steel plate is made of hot rolling low alloy structural steel. Low alloy steel plates are both killed steel and semi-killed steel plates. Its advantages are higher strength, better performance, saving a lot of steel, reducing structural weight, etc. ​

(1) Main uses: Low alloy structural steel plates are increasingly used in machinery manufacturing and metal structural parts.

(2) Material grade, chemical steel plate

(3) For specifications, dimensions and composition of steel plates, please refer to the relevant sections of section steel. The standard hot-rolled steel plate thickness of low alloy steel plate is 4.5-200mm.

(4) Production units Anshan Iron and Steel Company, Wuhan Iron and Steel Company, Wuyang Iron and Steel Company, Maanshan Iron and Steel Company, Chongqing Steel Plant, Xinyu Steel Plant, Liuzhou Steel Plant, Kunming Iron and Steel Company, Tianjin Steel Plant, Shaoguan Special Steel Plant, Anyang Iron and Steel Company, Shanghai Iron and Steel Company No. 1 and No. 3 Factory and Taiyuan Iron and Steel Co., Ltd.

2. Hot rolled steel plates for general structures (GB2517-81) (1) Main uses: Mainly used for general structures such as buildings, bridges, vehicles, etc. ​

(2) Material grade and chemical composition

(3) Mechanical properties (4) Specifications and dimensions: The thickness of steel plate (strip) is from 1.2-13.0mm; the width is from 700-1550mm; the length is from 2000-12000mm.

3. Weathering steel plates for welded structures (GB4172-84) Weathering steel is atmospheric corrosion-resistant steel. Weathering steel for welded structures adds a small amount of alloying elements to the steel, such as steel, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, etc., to form a protective layer on the surface of the sheet metal matrix to improve the weather resistance of the steel. and good welding performance. ​

(1) Main uses: Mainly used in bridges, buildings and other structures. ​

(2) Material grade and chemical composition

(3) Mechanical properties

4. High weather-resistant structural steel plate (GB4171-84) Weather-resistant steel is resistant to atmospheric corrosion. Adding a small amount of alloying elements to steel, such as steel, phosphorus, chromium, nickel, molybdenum niobium, titanium, zirconium and vanadium, etc., forms a protective layer on the surface of the metal matrix to improve the weather resistance of the steel. ​

(1) Main uses: Mainly suitable for buildings, vehicles, towers and other industrial ceramic parts. ​

(2) Material grade and chemical composition

(3) Mechanical properties 5. Pattern steel plate (GB3277-82) Pattern steel plate is a steel plate with rhombus or lentil-shaped protrusions on its surface. Its specifications are expressed in terms of its own thickness (the thickness of the protruding edges is not included). ​

(1) Main uses: Patterned boards have anti-slip properties and are commonly used as floors, factory escalators, work frame treads, ship decks and car floors, etc. ​

(2) Material grade and chemical composition The material of the pattern plate is rolled from B1, B2 and B3 grade steel of ordinary carbon structural steel, and its chemical composition complies with the regulations of GB700-79 (Technical Conditions for Ordinary Carbon Structural Steel). ​

(3) Specifications and theoretical weight of steel plates

(4) Production unit