文档介绍：National Standard of the People’s Republic of China
GB/T 1173-1995
Superseding GB 1173-86
Casting Aluminum Alloys
Content and Application Scope
This Standard sets forth technical requirements and inspection rules for casting aluminum alloys.
This Standard applies to the production of aluminum alloy casting and shall be used in conjunction with the National Standard GB 9438 Aluminum Alloy Castings – Technical Specification.
Normative References
GB 9438 Aluminum Alloy Castings – Technical Specification
GB 8063 Designation of Cast Nonferrous Metals and Their Alloys
GB ~ Methods for Chemical Analysis of Aluminum and Aluminum Alloys
GB 228 Test Method of Drawing Metal
GB 231 Test Method of Brinell hardness of Metal
General Provision
Designation of Alloy
The designation of casting aluminum alloys shall be in conformity with the provisions as specified in GB 8063.
Code of Alloy
For the purpose of this Standard, the code of alloy posed of letter “Z,”“L”(They are the first letter of Chinese spelling of “Casting” and “Aluminum” respectively) and 3 digits following them. The first digit following ZL indicates the alloy system (for example, 1, 2, 3 and 4 indicate aluminum-silicon alloy, aluminum-copper alloy, aluminum-magnesium alloy and aluminum-zinc alloy respectively), and the second and third digits following ZL indicate serial number.
A letter “A” is attached behind the digits for high-quality alloy.
Code for Casting Method and Modification
S —— Sand casting
J —— Metal mold casting
R —— Lost wax casting
K —— Shell casting
B —— Modification
Code for Alloy State
F —— As-cast
T1 —— Artificially aged
T2 —— Annealed
T4 —— Solid-solution treated and naturally aged
T5 —— Solid-solution treated and partially artificially aged
T6 —— Solid-solution treated and fully artificially aged
T7 —— Solid-solution treated and stabilizing treated
T8 —— Solid-solution treated and softening treated
Technical Requirement
The pos