This standard specifies the code, chemical element symbol, nominal content and mechanical properties of cast steel grades. This standard is applicable to all kinds of cast steel. GB/T 5613-1995 Method for expressing cast steel grades GB/T5613-1995 Standard download decompression password: www.bzxz.net

L'DC: 669.141.25 :003. 6
National Standard of the People's Republic of China
GB/T 5613-1995
Code for representing cast steels1995.05-10Promulgated
Implementation on 1996-07-01
Promulgated by the State Administration of Technology
National Standard of the People's Republic of China
Code for representing cast steels1 Subject Content and Applicability
GR/T5613-1995
GB5613-85
This standard specifies the permitted codes, chemical element symbols, nominal content and mechanical energy expression methods. This standard is applicable to various types of steel.
2 Reference standards
CB8170 Numerical sample rules
3 Method of expressing cast steel grades
3.1 Cast steel code
The Chinese spelling of the two characters "Z" is used to represent the cast steel code. 3.2 Symbols, contents and mechanical properties The symbols of the main elements in steel are represented by the international chemical element symbol, and the nominal content and mechanical properties are represented by Arabic numerals. The relevant contract rules shall comply with the provisions of GB8170. 3-3 Steel grades represented by strengthbzxz.net
In the grade, the two groups of numbers on the "G" side represent the mechanical properties. The first group of numbers represents the minimum strength value of the steel of this grade, and the second group of numbers represents the minimum strength value. The two groups of numbers are combined with "". 3.4 Steel grades indicated by chemical composition
3.4. In the grade, the group of numbers after \7G\ indicates the nominal carbon content of the steel. For cast steel with an average carbon content greater than 1%, the nominal carbon content is not indicated in the grade. For steel with an average carbon content less than 0.1%, the first digit is \\, and only the upper limit of carbon content is given. For steel without a lower limit, the nominal carbon content in the first number is indicated by the upper limit. 3.4.2 The symbols of the main alloying elements are listed in the nominal content, and the nominal percentage content is indicated in integers after each element symbol. 3.4.3 When the average content of the alloying elements is less than 1.9%, the symbol is not indicated in the grade. When the average content is 0.5%~3.4%, the number is indicated without the content. When the average content of alloying elements is 0.9%-1.1%, the number 1 shall be marked after the element symbol. 3.4.4 When the average content of lead is less than 0.15% and the average content of other elements is less than 0.5%, no element symbol shall be marked in the grade number. When the average content of tungsten elements is greater than 0.15% or less than 0.9%, no element symbol shall be marked in the grade number. 3.4.5 When the average content of vanadium is less than 1.9% and the average content of micro-alloying elements such as vanadium, vanadium and soda is less than 0.5%, the element symbol shall be marked in the grade number, but no single element content shall be marked. 3.4.6 When there are more than one main alloying elements, only the nominal content of the first one or the first three elements can be marked in the grade number. 3.4.7 When there are more than two main alloying elements in the grade number, the marking order of the element symbols shall be arranged in the order of their nominal content. If the nominal contents of two elements are the same, they shall be arranged in alphabetical order according to the symbol. 3.4.8 In special cases, when the same brand is divided into several varieties, " can be used to separate the brand name, and other numbers can be used to mark the variety number.
Approved by the State Administration of Technical Supervision on May 10, 1995 and implemented on July 1, 1996
Additional instructions,
GB/T56131995
Tensile strength (MPa)
Strength (MPa)
The symbol at the end of the casting number, its nominal content is less than the nominal percentage content of the import. The symbol for the initial element of the standard is the nominal percentage of chromium. The symbol for the initial element of the standard is the nominal percentage of chromium. The symbol for the nominal percentage of chromium is the nominal percentage of carbon. The symbol for the nominal percentage of carbon is the nominal percentage of carbon. The standard is proposed by the local technical committee of the professional standardization of the whole steel industry. The drafting of this standard was jointly undertaken by the Shenyang Institute of Industry and Information Technology, and the main drafters of this standard were Zhang Zhongqiu, Liu Xili, and Gu Zongguang.
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