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2, SPHC - the first S is an abbreviation for steel Steel, P is the abbreviation of plate plate, H is the abbreviation of Hot Heat, C commercial abbreviation, the overall expression of the general use of hot-rolled steel plate and strip.
3, SPHD - said stamping with hot-rolled steel sheet and strip.
4, SPHE - said deep-drawn hot rolled steel plate and strip.
5, SPCC - said the general use of cold-rolled carbon steel sheet and strip, equivalent to China's Q195-215A grade. The third letter, C, stands for Cold Cold. To ensure the tensile test, add T to SPCCT at the end of the grade.
6, SPCD - said cold stamping carbon steel sheet and strip, equivalent to China 08AL (13237) high-quality carbon structural steel.
7, SPCE - said deep-drawn cold-rolled carbon steel sheet and strip, equivalent to China 08AL (5213) deep-drawn steel. When it is necessary to ensure non-timeliness, add N to SPCEN at the end of the brand. Cold-rolled carbon steel sheet and steel strip tempering code: Annealed state is A, standard tempering is S, 1/8 hard is 8, 1/4 hard is 4, 1/2 hard is 2, hard is 1. Surface processing code: matt finish D, bright finish B. For example, SPCC-SD is a standard cold-rolled carbon sheet for standard quenched and matt finish rolling. Another example is SPCCT-SB, which is a cold-rolled carbon sheet that requires standard conditioning, bright processing, and mechanical properties.
8. The steel grades of JIS mechanical structure are indicated by: S + carbon content + letter code (C, CK), in which the carbon content is represented by the middle value × 100, and the letter C: indicates carbon K: the carburizing steel. Such as the carbon knot board S20C its carbon content is 0.18-0.23%.
Second, China and Japan silicon steel plate number indication method 1, China brand number representation method (1) cold rolled non-oriented silicon steel strip (sheet)
Expression method: DW + iron loss value (at a frequency of 50HZ, the waveform is sinusoidal with a magnetic peak value of 1.5T per unit weight of the iron loss value.) 100 times + thickness of 100 times. For example, DW470-50 indicates cold-rolled non-oriented silicon steel with an iron loss of 4.7w/kg and a thickness of 0.5mm. The new model is now 50W470.
(2) Cold rolled oriented silicon steel strip (sheet)
Representation method: DQ + iron loss value (at a frequency of 50HZ, the waveform is sinusoidal with a magnetic peak value of 1.7T per unit weight of iron loss). 100 times the thickness + 100 times the thickness. Sometimes adding G after the iron loss value indicates high magnetic induction. For example, DQ133-30 shows a cold-rolled oriented silicon steel strip (sheet) with an iron loss value of 1.33 and a thickness of 0.3 mm. The new model is now 30Q133.
(3) Hot-Rolled Silicon Steel Sheet Hot-rolled silicon steel sheet is represented by DR, and divided into low-silicon steel (silicon content ≤ 2.8%) and high-silicon steel (silicon content > 2.8%) according to the content of silicon. Expression method: DR + iron loss value (repetition magnetization with 50HZ and sinusoidal variation of the maximum magnetic induction intensity of 1.5T when the iron loss value per unit weight) 100 times + 100 times the thickness value. For example, DR510-50 shows a hot rolled silicon steel sheet with an iron loss value of 5.1 and a thickness of 0.5 mm. The grades of hot-rolled silicon steel sheets used in household appliances are represented by JDR+ iron loss value + thickness value, such as JDR540-50.
2. Japanese grade indication method (1) Cold-rolled non-oriented silicon steel strip from nominal thickness (value increased by 100 times) + code A+ iron loss guaranteed value (enlarged iron loss value at a frequency of 50 Hz and maximum flux density of 1.5 T. 100 times the value). For example, 50A470 indicates a cold rolled non-oriented silicon steel strip having a thickness of 0.5 mm and an iron loss guaranteed value of ≤ 4.7.
(2) Cold-rolled grain-oriented silicon steel strips from the nominal thickness (value increased by 100 times) + code G: represents common materials, P: high-alignment material + iron loss guaranteed value (frequency 50HZ, maximum flux density 1.7T The value of iron loss increases by 100 times.) For example, 30G130 indicates a cold rolled oriented silicon steel strip with a thickness of 0.3 mm and a guaranteed iron loss value of ≤ 1.3.
III. Nomenclature of Baosteel 1550 cold-rolled steel products (I) Naming method of cold-rolled steel strips for stamping 1. General steel for stamping: BLCB—Baosteel (BAOSTEEL) abbreviation; L—Low Carbon (Cold Carbon); Commercial)
2, anti-aging low yield steel: BLDB - Baosteel (BAOSTEEL) abbreviation; L - Low Carbon (Low Carbon); D - Drawing (Drawing)
3. Non-time-sensitive extremely deep-drawn steel: BUFD (BUSD) B—BAOSTEEL abbreviation; U—Ultra; F—Formability; D—Drawing
4. Non-ageing super deep drawing steel: BSUFDB—BAOSTEEL abbreviation; SU—Super Ultra (Super); F—Formability; D—Drawing
(B) Cold-rolled high-strength tandem cold-rolled steel strip designation B ××× × ×
B—BAOSTEEL abbreviation; ××—Minimum yield point value; ×—Generally used for V, X, Y, Z for V: High-strength low-alloy, with no difference between yield point and tensile strength X:V middle The difference between the minimum yield point and the minimum tensile strength 70 MPa
The difference between the minimum yield point in Y:V and the minimum tensile strength is 100MPa
The difference between the minimum value of yield point in Z:V and the minimum value of tensile strength 140MPa
X-oxide/sulfide inclusion control (K: sedation, fine grain; F: K+ sulfide control; O: K, F)
Example: B240ZK, B340VK
(III) Method for naming cold-rolled steel strips with dents resistance B ××× × ×
B—BAOSTEEL abbreviation ××—Minimum Yield Point ×—Strengthening (P: Intensification; H: Bake Hardening)
×—represented by 1 or 2 (1: ultra low carbon; 2: low carbon)
Example: B210P1: High-strength steel for deep drawing; B250P2: High-strength steel for general processing; B180H1: Bake hardened steel for deep drawing.
Steel product brand representation
1. Common structural steel used in steel plates for ordinary and mechanical structures Common structural steels in Japanese steel grades (JIS series) are mainly composed of three parts. The first part represents materials, such as: S (Steel) for steel, F (Ferrum) Represents iron; the second part represents different shapes, types, and uses, such as P (Plate) plate, T (Tube) tube, K (Kogu) tool; the third part shows the characteristic number, generally the lowest tensile strength . For example: SS400 - the first S is steel, the second S is structure, 400 is lower limit tensile strength 400 MPa, and the general structure steel is 400 MPa tensile strength.