GB/T 5612-1985 Code for representing cast iron
1 Code for representing cast iron
1.1 Codes for various cast irons
The various cast iron codes consist of the first uppercase letter from the Pinyin transcription of the cast iron's characteristics. In cases where two forms of cast iron share the same initial code letter, a lowercase letter can be appended to the uppercase letter to differentiate them. For further subdivisions within the same form of cast iron, the first uppercase letter of the Pinyin for the subdividing feature is used and added subsequently. See Annex A (Supplement) for the codes.
1.2 Element symbol, nominal content and mechanical properties
Alloying element symbols are represented by international chemical element symbols, and mixed rare earth element symbols are represented by "R". The content and mechanical properties are represented by Arabic numerals.
1 Code for representing cast iron
2 Examples
Annex A Name, code and designation of cast irons (Supplement)
