This document specifies the designation and code, technical requirements, test methods, inspection rules, as well as marking, quality certificate, packaging, transportation and storage of die casting zinc alloys.
This document is applicable to the production and inspection of die casting zinc alloys.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8738-2014 Zinc alloy ingots for casting
GB/T 12689.1 Methods for chemical analysis of zinc and zinc alloys - Part 1: Determination of aluminum content - Chromazurol S-polyethylene glycol octyl phenylether-cetylpyridine bromine spectrophotometry, Chromeazurol S spectrophotometric method and EDTA titrimetry
GB/T 12689.3 The methods for chemical analysis of zinc and zinc alloys - The determination of cadmium content - The flame atomic absorption spectrometric method
GB/T 12689.4 The methods for chemical analysis of zinc and zinc alloys - The determination of copper content - The lead diethyldithio-carbamate spectrophotometric method and the flame atomic absorption spectrometric method and the electrolytic method
GB/T 12689.5 The methods for chemical analysis of zinc and zinc alloys - The determination of iron content - The sultosalicylic acid spectrometric method and the flame atomic absorption spectrometric method
GB/T 12689.6 The methods for chemical analysis of zinc and alloys - The determination of lead content - The oscillopolarographic method
GB/T 12689.7 Methods for chemical analysis of zinc and zinc alloys - Part 7: Determination of magnesium content - Flame atomic absorption spectrometric method
GB/T 12689.8 The methods for chemical analysis of zinc and alloys - The determination of silicon content - The molybdenum blue spectrophotometric method
GB/T 12689.10 The methods for chemical analysis of zinc and zinc alloys - The determination of tin content - The phenylfluorone-cetyltrimethyla-mmonium bromide spectrophotometric method
GB/T 12689.12 The methods for chemical analysis of zinc and zinc alloys - The determination of lead, cadmium, iron, copper, tin, aluminium, arsenic, stibium, magnesium lanthanum and cerium contents - The inductively coupled plasma-optical emission spectrometric method
GB/T 26042 Methods for analysis of zinc and zinc alloys - The optical emission spectrometry
3 Terms and definitions
No terms and definitions are listed in this document.
4 Alloy designation and code
4.1 Representation method of designations
The designation of die casting zinc alloys is composed of the chemical symbols of zinc and main alloy elements. The main alloy element is followed by a number indicating its nominal mass fraction, which is the round-off integer of this element's average mass fraction.
The letters "Y" and "Z" [the first letters of Chinese phonetic alphabets "Ya" and "Zhu" (die casting)] added before the alloy designation indicate that it is a die casting zinc alloy. The last letter is used to distinguish different alloys with the same nominal mass fraction of main alloy elements and slightly different contents of other elements (see Table 1 for specific differences).
4.2 Representation method of codes
The letters "YX" ["Y" and "X" are respectively the first letters of Chinese phonetic alphabets "Ya" and "Xin"] in the alloy designation indicate that it is a die casting zinc alloy. "YX" is followed by three Arabic numerals and one letter. The first and second digits represent the nominal mass fraction of aluminum element in the alloy, the third digit represents the nominal mass fraction of copper element in the alloy, and the last letter uses "A, B and C" to distinguish alloys with the same nominal mass fraction of aluminum element and slightly different mass fraction of other elements.
The code of die casting zinc alloy is expressed as follows:
Example 1:
YX040A indicates that the nominal mass fraction of the aluminum element in the die casting zinc alloy is about 4% and the nominal mass fraction of the copper element is less than 1%, which is a type A alloy.
Example 2:
YX041 indicates that the nominal mass fraction of the aluminum element in the die casting zinc alloy is about 4% and the nominal mass fraction of the copper element is about 1%.
Contents 1 Scope 2 Normative references 3 Terms and definitions 4 Alloy designation and code 5 Surface quality 6 Test methods 7 Inspection rules 8 Marking, quality certificate, packaging, transportation and storage Annex A (Informative) Comparison of die casting zinc alloy code
