Chinese wholesale Steel Coil - Carbon Steel Alloy Steel Plate – JINBAICHENG

product category

1. Used as steel for various machine parts. It includes carburized steel, quenched and tempered steel, spring steel and rolling bearing steel.
2. Steel used as engineering structure. It includes A, B, special grade steel and ordinary low alloy steel in carbon steel.

Carbon structural steel
High-quality carbon structural steel hot-rolled thin steel plates and steel strips are used in the automotive, aerospace industries and other sectors. Its steel grades are rimmed steel: 08F, 10F, 15F; killed steel: 08, 08AL, 10, 15, 20, 25, 30, 35, 40, 45, 50. Low carbon steel plates below 25 and 25, 30 and Above 30 is medium carbon steel plate.

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Classification

Classification by thickness
Thin steel plate <4 mm (the thinnest 0.2 mm), thick steel plate 4-60 mm, extra-thick steel plate 60-115 mm. The width of the thin plate is 500-1500 mm; the width of the thick plate is 600-3000 mm. The steel type of thick steel plate It is basically the same as the thin steel plate. In terms of products, in addition to bridge steel plates, boiler steel plates, automobile manufacturing steel plates, pressure vessel steel plates and multi-layer high-pressure vessel steel plates, which are purely thick plates, some types of steel plates such as automobile beam steel plates (thickness 2.5-10 mm), pattern Steel plates (thickness 2.5-8 mm), stainless steel plates, heat-resistant steel plates, etc. are crossed with thin plates. 2. The steel plate is divided into hot-rolled and cold-rolled according to rolling.

Classified by purpose
(1) Bridge steel plate (2) Boiler steel plate (3) Shipbuilding steel plate (4) Armor steel plate (5) Automobile steel plate (6) Roof steel plate (7) Structural steel plate (8) Electrical steel plate (silicon steel sheet) (9) Spring steel plate ( 10) Other

Classified by structure
1. Steel plate for pressure vessel: Use capital R to indicate at the end of the grade. The grade can be expressed by yield point or carbon content or alloying elements. Such as: Q345R, Q345 is the yield point. Another example: 20R, 16MnR, 15MnVR, 15MnVNR, 8MnMoNbR, MnNiMoNbR, 15CrMoR, etc. are all represented by carbon content or alloying elements.
2. Steel plate for welding gas cylinders: Use capital HP to indicate at the end of the grade, and its grade can be expressed by yield point, such as: Q295HP, Q345HP; it can also be expressed with alloying elements, such as: 16MnREHP.
3. Steel plate for boiler: Use lowercase g to indicate at the end of the brand name. Its grade can be expressed by yield point, such as: Q390g; it can also be expressed by carbon content or alloying elements, such as 20g, 22Mng, 15CrMog, 16Mng, 19Mng, 13MnNiCrMoNbg, 12Cr1MoVg, etc.
4. Steel plates for bridges: Use lowercase q to indicate at the end of the grade, such as Q420q, 16Mnq, 14MnNbq, etc.
5. Steel plate for automobile beam: Use capital L to indicate at the end of the grade, such as 09MnREL, 06TiL, 08TiL, 10TiL, 09SiVL, 16MnL, 16MnREL, etc.

Chinese brand

(1) Cold rolled non-oriented silicon steel strip (sheet): Representation method: DW + iron loss value (at a frequency of 50HZ, the peak value of magnetic induction with a sinusoidal waveform is 1.5T iron loss per unit weight.) 100 times + thickness value 100 times.
For example, DW470-50 represents a cold-rolled non-oriented silicon steel with an iron loss value of 4.7w/kg and a thickness of 0.5mm. The new model is represented as 50W470.

(2) Cold-rolled oriented silicon steel strip (sheet): Representation method: DQ + iron loss value (at a frequency of 50HZ, the peak value of magnetic induction with a sinusoidal waveform is 1.7T iron loss per unit weight.) 100 times + thickness value 100 times. Sometimes G is added after the iron loss value to indicate high magnetic induction. For example, DQ133-30 represents a cold-rolled oriented silicon steel strip (sheet) with an iron loss value of 1.33 and a thickness of 0.3mm. The new model is now represented as 30Q133.

(3) Hot-rolled silicon steel sheet: Hot-rolled silicon steel sheet is represented by DR, which is divided into low silicon steel (silicon content ≤2.8%) and high silicon steel (silicon content >2.8%) according to the silicon content. Representation method: DR + iron loss value (the value of iron loss per unit weight when the maximum value of magnetic induction with 50HZ repeated magnetization and sinusoidal change is 1.5T) + 100 times the thickness value. For example, DR510-50 represents a hot-rolled silicon steel sheet with an iron loss value of 5.1 and a thickness of 0.5mm. The grades of hot-rolled silicon steel sheets for household appliances are expressed by JDR + iron loss value + thickness value, such as JDR540-50.

Specification