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Classification of steel plates (including strip steel), 1. Classification of steel plates (including strip steel):
, Classified by thickness:
Thin plate, medium plate, thick plate, extra thick plate
, Classified by production method:
Hot...
1. Classification of steel plates (including strip steel) :
, classified by thickness: thin plate, medium plate, thick plate, extra thick plate
, classified by production method: hot-rolled steel plate, cold-rolled steel plate
, classified by surface characteristics: galvanized plate (hot-dip Zinc plate, electro-galvanized plate) Tin plate Composite steel plate Color-coated steel plate
Classification by use: Bridge steel plate Boiler steel plate Shipbuilding steel plate Armor steel plate Automobile steel plate Roofing steel plate Structural steel plate Electrical steel plate (silicon steel sheet) Spring steel plate Others
/> 2. Common Japanese brands in ordinary and mechanical structural steel plates
Among the brands of Japanese steel (series), ordinary structural steel mainly consists of three parts: the first part indicates the material, such as: indicating steel, (rr) The second part indicates different shapes, types and uses of iron, such as plates, (b) tubes, and tools. The third part indicates characteristic numbers, generally the lowest tensile strength. For example: &&, the first one represents steel, the second one represents "structure", which is the lower limit of tensile strength, and the whole represents ordinary structural steel with a tensile strength of .
, & The first digit is the abbreviation of steel, the abbreviation of plate, the abbreviation of heat, the abbreviation of C commercial c, the overall representation generally uses hot-rolled steel plates and steel strips.
, && indicates hot-rolled steel plates and steel strips for stamping.
, && indicates hot-rolled steel plates and steel strips for deep drawing.
, && indicates that cold-rolled carbon steel sheets and strips are generally used, which is equivalent to Chinese brands. The third letter C is the abbreviation of cold C. When it is necessary to ensure the tensile test, add "" at the end of the grade.
, & means cold-rolled carbon steel sheets and strips for stamping, which are equivalent to China's high-quality carbon structural steel.
, & indicates cold-rolled carbon steel sheets and strips for deep drawing, which is equivalent to Chinese deep drawing steel. When non-timeliness needs to be ensured, add C at the end of the grade.
Quenching and tempering code for cold-rolled carbon steel sheets and steel strips: annealing state is, standard quenching and tempering is, /hard is, /hard is, /hard is, hard is.
Surface processing code: matte finish rolling is, bright finish rolling is B. For example, if it means standard quenching and tempering, matte finish rolling, cold-rolled carbon sheets are generally used. Another example is B, which represents standard quenching and tempering, bright processing, and cold-rolled carbon sheets that require guaranteed mechanical properties.
The method of expressing steel grades for mechanical structures is:
+ carbon content + letter code (C), where the carbon content is represented by the intermediate value &, and the letter represents carbon: indicating steel for carburizing. For example, the carbon content of carbon rolled plate C is ..%.
3. The expression method of silicon steel sheet grades in my country and Japan
The Chinese grade expression method:
Cold-rolled non-oriented silicon steel strip (sheet)
The expression method: + iron loss value (in The frequency is, the waveform is sinusoidal, and the peak value of the magnetic induction is times the iron loss value per unit weight.) + times the thickness value.
For example, if the iron loss value is ./ and the thickness is ., the new model of cold-rolled non-oriented silicon steel is expressed as.
Cold-rolled oriented silicon steel strip (sheet)
Representation method: + iron loss value (the iron loss value per unit weight when the frequency is, the magnetic induction peak value of the waveform is sinusoidal.) + the thickness value times. Sometimes the iron loss value is added after the value to indicate high magnetic induction.
For example, if the iron loss value is . and the thickness is ., the cold-rolled oriented silicon steel strip (sheet) is represented by the new model.
Hot-rolled silicon steel plate
Hot-rolled silicon steel plate is represented by R. According to the silicon content, it is divided into low silicon steel (silicon content &.%) and high silicon steel (silicon content >.%).
Representation method: R + times of the iron loss value (the iron loss value per unit weight when the maximum value of the magnetic induction intensity that changes in a sinusoidal shape after repeated magnetization is .) + times of the thickness value. For example, R represents a hot-rolled silicon steel plate with an iron loss value of . and a thickness of .
The grade of hot-rolled silicon steel sheet for household appliances is represented by R+iron loss value+thickness value, such as R.
, Japanese brand representation method:
Cold-rolled non-oriented silicon steel strip
It is composed of nominal thickness (magnification value) + code + iron loss guaranteed value (frequency, maximum magnetic flux density is. The iron loss value at the time is multiplied by the value).
For example, it represents a cold-rolled non-oriented silicon steel strip with a thickness of . and a guaranteed iron loss value of &.
Cold-rolled oriented silicon steel strip
The nominal thickness (enlarged value) + code: represents ordinary materials, : represents highly oriented materials + iron loss guaranteed value (frequency, maximum magnetic flux density is. The iron loss value at the time is multiplied by the value).
For example, it represents a cold-rolled oriented silicon steel strip with a thickness of . and a guaranteed iron loss value of &.
4. Electroplated tin plate and hot-dip galvanized plate:
, Electroplated tin plate
Electroplated tin steel plate and steel strip, also known as tinplate, the surface of this steel plate (strip) is plated with tin. It has good corrosion resistance and is non-toxic. It can be used as packaging materials for cans, inner and outer sheaths of cables, instrument and telecommunications parts, flashlights and other small hardware.
, hot-dip galvanized sheet
Coating the surface of thin steel plates and steel strips with zinc using a continuous hot-dip method can prevent corrosion and rust on the surface of thin steel plates and steel strips. Galvanized steel sheets and steel strips are widely used in machinery, light industry, construction, transportation, chemical industry, post and telecommunications and other industries.
9CrSi mold steel length