1 Scope
This standard specifies the designations and codes, technical requirements, test methods and inspection rules of casting aluminium alloys.
This standard is applicable to the casting aluminium alloys for use of aluminium alloy castings (excluding die castings).
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 228.1 "Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature"
GB/T 231.1 "Metallic Materials - Brinell Hardness Test - Part 1: Test Method"
GB/T 5678 "Sampling Methods of Spectrochemical Analysis for Cast Alloys"
GB/T 7999 "Optical Emission Spectrometric Analysis Method of Aluminium and Aluminium Alloys"
GB/T 8063 "Desingnation of Cast Nonferrous Metals and Their Alloys"
GB/T 8170 "Rules of Rounding off for Numerical Values & Expression and Judgment of Limiting Values"
GB/T 9438 "Aluminium Alloy Castings"
GB/T 20975(All Parts) "Methods for Chemical Analysis of Aluminium and Aluminium Alloys"
3 Alloy Designations and Codes
3.1 Alloy designations
The designation of casting aluminium alloys is made in accordance with the requirements of GB/T 8063.
3.2 Alloy codes
The alloy codes in this standard are composed of the Chinese phonetic alphabets "ZL" representing "Zhulv" (casting aluminium) and three subsequent Arabic numbers. The number right after ZL represents for the series of the alloy, where 1, 2, 3 and 4 stand for aluminium-silicon, aluminium-bronze, aluminium-magnesium and aluminium-zinc series respectively. The second and the third numbers after ZL are the sequence number of the alloy.
High quality alloys are indicated with a letter "A" suffixed to its code.
Foreword I
1 Scope
2 Normative References
3 Designations and Codes of Alloys
4 Technical Requirements
5 Test Methods
6 Inspection Rules
Appendix A (Informative) Recommended Heat Treatment Processes
Appendix B (Informative) Recommended Casting Drawings for Separately Casted Samples
