Carbon structural steel hot-rolled coils

 　　Structural steel plate

　　Structural steel plate (mechanical engineering material): refers to steel that meets a specific strength and formability level. Formability is expressed as elongation after interruption of tensile testing. Structural steel is generally used for load-bearing and other purposes, in which the strength of the steel is a reuse design standard. Structural steel is a type of special steel

　　catalogue

　　classification

　　1. Steel used as various machine parts. It includes carburized steel, quenched and tempered steel, spring steel, and rolling bearing steel.

　　2. Steel used for engineering structures. It includes A, B, special steel, and ordinary low alloy steel in carbon steel.

　　Japanese brand

　　Representation method

　　The first part represents the material, for example: s (steel) represents steel, F (Ferrim) represents iron

　　The second part represents different shapes, types, and uses, such as P (Plate) for plates, T (Tube) for tubes, and K (Kogu) for tools;

　　The third part represents the characteristic number, which is generally the minimum tensile strength. For example, SS400- the first S represents Steel, the second S represents Structure, 400 represents the lower limit tensile strength of 400MPa, and the overall represents ordinary structural steel with a tensile strength of 400MPa

　　SPHC

　　The first S is the abbreviation for steel plate, P is the abbreviation for plate plate, H is the abbreviation for hot heat, and C is the abbreviation for commercial. It represents the general use of hot-rolled steel plates and strips

　　SPHD

　　Hot rolled steel plates and strips for stamping

　　SPHE

　　Represents hot-rolled steel plates and strips for deep drawing

　　SPcC

　　Generally, cold-rolled carbon steel sheets and strips are used, equivalent to the Chinese Q195-215A brand. The=letter C is the abbreviation for Cold. To ensure tensile testing, add T at the end of the grade as SPCCT.

　　SPCD

　　Refers to cold-rolled carbon steel sheets and strips used for stamping, equivalent to China's 08AL (13237) high-quality carbon structural steel.

　　SPCE

　　Refers to cold-rolled carbon steel sheets and strips used for deep drawing, equivalent to Chinese 08AL (5213) deep drawing steel. When non timeliness is required to be verified, add N at the end of the brand as SPCEN.

　　Cold rolled carbon steel sheet and strip quenching and tempering code: Annealed state is A, standard quenching and tempering is S, 1/8 hard is 81/4 hard is 4, 1/2 hard is 2, and hard is 1.

　　Surface processing code: D for matte finish rolling and B for bright finish rolling. For example, SPCC-SD refers to the standard quenched and tempered matte finish rolled carbon sheet, which is generally cold-rolled. For example, SPCCT-SB refers to cold-rolled carbon sheets with standard quenching and tempering, bright processing, and requirements for ensuring mechanical properties

　　Mechanical structural steel plate

　　S+carbon content+letter code (C, CK), where the carbon content is represented by the intermediate value x100, and the letter C represents carbon K: represents carburizing steel. For example, the carbon content of S20C carbon curling plate is 0.18-0.23%

　　Carbon structural steel

　　Steel plate knowledge: High quality carbon structural steel hot-rolled thin steel plates and strips are used in automotive, aviation industry, and other sectors. The steel grades are boiling steel: 08F, 10F, 15F; killed steel: 08, 08AL, 10, 1520, 25, 30, 35, 40, 45, 50. 25 and below are low-carbon steel plates, while 30 and above are medium carbon steel plates.

　　Chinese brand

　　(1) Cold rolled non oriented silicon steel strip (sheet): Representation method: DW+iron loss value (unit weight iron loss value with a sinusoidal magnetic induction peak of 1.5T at a frequency of 50HZ)+100 times the thickness value

　　For example, DW470-50 represents an iron loss value of 4.7w/kg and a thickness of 0.5mm for cold-rolled non oriented silicon steel. The current new model is 50W470

　　(2) Cold oriented silicon steel strip (sheet): Representation method: DQ+iron loss value (at a frequency of 50HZ, with a sinusoidal magnetic induction peak of 1.7T per unit weight iron loss value)+100 times the thickness value. Sometimes adding G after the iron loss value indicates 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 30Q133

　　(3) Hot rolled silicon steel plate: Hot rolled silicon steel plate is represented by DR and is divided into low silicon steel (with silicon content<2.8%) and="" high="" silicon="" steel="" with="" content="">2.8%) according to the amount of silicon content.

　　Representation method: 100 times the DR+iron loss value (the unit weight iron loss value when the maximum magnetic induction intensity is 1.5T with repeated magnetization of 50HZ and sinusoidal variation)+100 times the thickness value. For example, DR510-50 represents a hot-rolled silicon steel plate with a core loss value of 5.1 and a thickness of 0.5mm

　　The grade of hot-rolled silicon steel sheet for household appliances is represented by JDR+iron loss value+thickness value, such as JDR54050