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GB/T 1173-2013 English PDF (GBT1173-2013)

GB/T 1173-2013 English PDF (GBT1173-2013)

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GB/T 1173-2013: Casting aluminium alloy

This Standard specifies the designation and code, technical requirements, test methods and inspection rules of casting aluminum alloy. This Standard is applicable to casting aluminum alloy used for aluminum alloy casting.
GB/T 1173-2013
GB
NATIONAL STANDARD OF
THE PEOPLE REPUBLIC OF CHINA
ICS 77.120.10
J 31
Replacing GB/T 1173-1995
Casting aluminum alloy
ISSUED ON. SEPTEMBER 18, 2013
IMPLEMENTED ON. JUNE 1, 2014
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Alloy designation and code... 5
4 Technical requirements ... 6
5 Test methods ... 8
6 Test method ... 8
Annex A (Informative) Recommended heat treatment process ... 19
Annex B (Informative) Recommended single cast sample casting pattern ... 21 Foreword
This Standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This Standard replaces GB/T 1173-1995 Casting aluminium alloys.
Compared with GB/T 1173-1995, the main technical modifications in this
Standard are as follows.
- modified the chemical composition of the alloy; the mass fraction of Mg in ZAlSi7Mg1A (ZL114A) alloy was modified from 0.45% ~ 0.6% to 0.45%
~ 0.75%; the mass fraction of Be was modified from 0.04% ~ 0.07% to 0
~ 0.07%;
- added ZAlSi7Cu2Mg alloy designation;
- modified the mass fraction of impurity element Sn from 0 ~ 0.01% to 0 ~ 0.05%;
- added the inspection method for alloy chemical composition
spectroscopy;
- modified sampling methods for alloy chemical composition and
mechanical properties;
- added re-inspection rules for unqualified hardness.
This Standard was proposed by and shall be under the jurisdiction of National Technical Committee on Casting of Standardization Administration of China (SAC/TC 54).
Main drafting organization of this Standard. Shenyang Foundry Research
Institute.
The drafting organizations of this Standard. Anhui Hualing West Kitchen Equipment Co., Ltd., Tianjin Lizhong Alloy Group Co., Ltd., Fuxin Wanda Casting (Group) Co., Ltd., China Institute of Arms Science and Technology Ningbo Branch, Anhui Hengtai Power Technology Co., Ltd., Qingdao
Zhengda Casting Co., Ltd., China Aviation Industry Corporation Beijing
Aeronautical Materials Research Institute, FAW Foundry Ltd.
Main drafters of this Standard. Feng Zhijun, Wang Mingchang, Ge Sujing, Gao Yuliang, Zhan Liang, Chen Dahui, Liu Chuang, Zhang Gaowei, Song
Jingqing, Liu Guoli, Meng Ying.
Versions of standard substituted by this Standard are.
Casting aluminum alloy
1 Scope
This Standard specifies the designation and code, technical requirements, test methods and inspection rules of casting aluminum alloy.
This Standard is applicable to casting aluminum alloy used for aluminum alloy casting (excluding die casting).
2 Normative references
The following referenced documents are indispensable for the application 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 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 aluminum
and aluminum alloys
GB/T 8063, Cast nonferrous metals and their alloys
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 9438, Aluminum Alloy Castings
GB/T 20975 (all parts), Methods for chemical analysis of aluminium and
aluminium alloys
3 Alloy designation and code
3.1 Alloy designation representation method
The casting aluminum alloy designation representation method shall be in accordance with the provisions of GB/T 8063.
(determined by the purchaser) are essential elements. The remaining
impurity elements are analyzed only when the purchaser requires.
4.1.2 Aluminum silicon series require to use sodium or strontium
(intermediate alloy containing sodium salt and aluminum strontium) to carry out the deterioration treatment for deteriorated alloy. Under the premise of not reducing the use performance of the alloy, it shall allow to use other modifiers or metamorphic methods for deterioration treatment.
4.1.3 When used in marine environment, the copper content in ZL101 alloy shall not exceed 0.1%.
4.1.4 In metallic casting, the maximum silicon content in ZL203 alloy shall be 3.0%.
4.1.5 When the iron content in ZL105 alloy is greater than 0.4%, the
manganese content shall be greater than half of the iron content.
4.1.6 When ZL201 alloy, ZL201A alloy are used to make parts that work
under high temperature conditions, it shall add 0.05% ~ 0.20% of zirconium. 4.1.7 In order to improve the mechanical properties, 0.08% ~ 0.20% of
yttrium shall be allowed to contain in ZL101 alloy, ZL102 alloy, 0.08% ~ 0.20% of titanium in ZL103. At this time the iron content shall not be greater than 0.3%.
4.1.8 The aluminum alloy product contact with food is not allowed to contain beryllium. Arsenic content is not more than 0.015%. Zinc content is not more than 0.3%. Lead content is not more than 0.05%.
4.1.9 When the total impurity content is used to express the impurity content, in the absence of specific provisions, the content of each unlisted element shall not exceed 0.05%.
4.2 Mechanical properties
4.2.1 Mechanical properties of single cast sample of casting aluminum alloy under sand casting, metal casting, melt mold casting and shell casting
conditions are shown in Table 3.
Casting aluminum alloy uses single cast or attached sample to inspect the mechanical properties. It also can use cast body specimen extracted on the same furnace cast to inspect. Acceptance indicators for cast specimen and cast body specimen are in accordance with the provisions of GB/T 9438.
4.2.2 The hardness values shall be inspected in accordance with Table 3 requirements required by the purchaser. The hardness values shall be used only for references but not for acceptance basis.
6.4 Determination and re-inspection
6.4.1 When the first analysis result of alloy chemical composition is
unqualified, it shall allow to re-sample to analyze the unqualified element. Should the second analysis still fail, the chemical composition of this melting furnace shall be determined as unqualified.
6.4.2 For a melting furnace alloy, three cast or heat treated state single cast samples in the first submission shall be carried out for the determination of mechanical properties. If the mechanical properties of two or more samples comply with the provisions of Table 3, the mechanical properties of this furnace of alloy shall be determined as qualified. If the first inspection of single casting sample fails, it shall re-conduct sampling after heat treatment for the inspection. If it still fails, the third heat treatment shall be permitted. If the test results are still unqualified, the mechanical properties of this furnace of alloy shall be determined as unqualified.
6.4.3 The heat treatment of the single casting sample must be heat treated with the same batch of castings.
6.4.4 Various casting methods allow the use of sand or metal mold samples to determine the mechanical properties. And the acceptance shall be carried out according to corresponding indicators of sand or metal mold samples. 6.4.5 Hardness can be repeated for heat treatment, but the total heat
treatment should not be more than 3 times. The alloys after heat treatment, in addition to the hardness inspection, the alloy?€?s tensile strength and elongation shall be also inspected.
6.4.6 When the tensile test sample defects exist or due to the test itself caused by the failure of the test results are not qualified, it shall not be included in the number of tests, but need to replace the sample for the re-inspection.
6.4.7 When the measured chemical composition and mechanical properties
values meet the limits, the rounding-off of effective digits shall be carried out according to the provisions of this Standard. The rounding-off rules shall be in accordance with GB/T 8170.

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