The method of indicating the grade of carbon steel in the NC cutting board is necessary for the use of the CNC cutting machine. The grades of the carbon structural steel and low alloy high strength structural steel are usually divided into general steel and special steel. We must understand the method indicated by the steel grade before we can make the CNC cutting machine more accurate and scientific. The following Wuhan Guardian Numerical Control Technology Co., Ltd. will introduce to you the carbon structure and low alloy grades of CNC cutting machine.
a. The universal structural steel uses a piny letter "Q" that represents the yield point. The values ​​of the yield point (in MPa) and the quality grade, deoxidation method, etc., are numbered in sequence. For example: Carbon structural steel grades are: Q235AF, Q235BZ; Low alloy high strength structural steel grades are: Q345CQ345D. In the composition of carbon structural steel, the symbol “Z†for the killed steel and the symbol “TZ†for the special killed steel can be omitted. For example: Q235 steel with quality class C and D respectively, and its grades indicate Q235CZ and Q235DTZ, However, it can be omitted for Q235C and Q235D. Low-alloy high-strength structural steels have killed steels and special killed steels, but the designation of the deoxidation method is not written on the tail of the grade.
b. Dedicated structural steels are generally represented by the symbol “Q†representing the yield point of the steel, the yield point value, and the symbol representing the use of the product. For example, the pressure vessel steel grade is “Q345Râ€; the weathering steel grade is: Q340NH .
c. According to requirements, the grade of general low alloy high strength structural steel can also be composed of two Arabic numerals (average carbon content in terms of several ten thousandths) and standard element symbols; the grade of special low alloy high strength structural steel, except In addition to the general composition, the symbols used in Table 1 to represent the use of the product should be added.
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