GB/T 19078-2016 PDF English
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| GB/T 19078-2016 | English | 375 |
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Magnesium alloys ingots for castings
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| GB/T 19078-2003 | English | 479 |
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Magnesium alloy ingots for castings
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GB/T 19078-2016: Magnesium alloys ingots for castings---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19078-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.20
H 61
Replacing GB/T 19078-2003
Magnesium alloys ingots for castings
Issued on. AUGUST 29, 2016
Implemented on. JULY 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Requirements... 5
4 Test methods... 12
5 Inspection rules... 12
6 Marking, packaging, transportation, storage and quality certificate... 14
7 Contents of order form (or contract)... 16
Appendix A (informative) Chemical composition and typical mechanical properties of
magnesium alloy castings... 17
Appendix B (informative) Comparison table of new designations, old designations
and old codes... 26
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 19078-2003 “Magnesium alloy ingots for casting”.
Compared with GB/T 19078-2003, the main technical changes are as follows.
- ADD the element codes “J” and “V” to represent the elements “Strontium (Sr)” and
“Gadolinium (Gd)” respectively;
- ADD the representation method of limit value;
- IMPROVE the naming rules of alloy groups;
- CHANGE the designations in EN 1753 to the corresponding designations in ISO
16220;
- ADD the chemical composition of AZ91A, AZ91B, AZ91C, AZ91E, AZ92A,
AZ33M, ZA81M, ZA84M, AM60A, AS21B, AS41A, AE44S, AE81M, AJ52A,
AJ62A, ZQ81M, EZ30M, EZ30Z, EV31A, WE43B, WV115Z, VW76S, VW103Z,
VQ132Z alloy ingots;
- ADD the chemical composition and typical mechanical properties of AZ91A,
AZ91B, AZ91C, AZ91E, AZ92A, AZ33M, ZA81M, ZA84M, AM60A, AS21B,
AS41A, AE44S, AE81M, AJ52A, AJ62A, ZQ81M, EZ30M, EZ30Z, EV31A,
WE43B, WV115Z, VQW76S, VW103Z alloy castings;
- ADD the comparison table of new designations, old designations and old codes,
see Appendix B.
This Standard was proposed by China Nonferrous Metals Industry Association.
This Standard shall under the jurisdiction of National Technical Committee on
Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Organization responsible for the drafting of this Standard. Shanghai Jiaotong University.
Organizations participating in the drafting of this Standard. Shanghai Light Alloy
Precision Forming National Engineering Research Center Co., Ltd., Northeast Light
Alloy Co., Ltd., Shandong Yinguangyuyuan Light Metal Precision Forming Co., Ltd.,
National Engineering Research Center for Magnesium Alloys, Henan Yuhang Metal
Materials Co., Ltd. Company, Zibo Hongtai Anticorrosion Co., Ltd., National Center
for Quality Supervision and Inspection of Magnesium and Magnesium Alloy Products,
Shanghai Fangle Auto Parts Co., Ltd., Shanghai Aiersi Light Alloy Products Co., Ltd.,
Institute of Metal Research of Chinese Academy of Sciences, Zhejiang Fangxiang
Industrial Co., Ltd., Zhejiang Qixin Alloy Materials Co., Ltd., Ningxia Taiyang
Magnesium Co., Ltd.
Main drafters of this Standard. Wang Yingxin, Peng Liming, Zeng Xiaoqin, Wang
Qudong, Jiang Haiyan, Wu Guohua, Ma Yue, Chen Lei, Wu Xiaoxu, Wang Qianjin,
Pang Junmin, Pan Fusheng, Zhang Jing, Xiang Dongxia, Li Qi, Li Qingrong, Sun
Qiming, Wang Ludong, Lv Lili, Qian Yafeng, Wu Jingmin, Lin Hongtao, Chen
Huiming, Chen Huihong, Huang Lu, Ding Huaixin, Li Yanlei, Yang Yuansheng, Luo
Tianjiao, Lin Chuhua, Zhao Xiaojun, Liu Junjun, Zhou Yuanfu.
The previous edition of the standard replaced by this Standard are as follows.
- GB/T 19078-2003.
Magnesium alloys ingots for castings
1 Scope
This Standard specifies the requirements, test methods, inspection rules and marking,
packaging, transportation and storage of magnesium alloy ingots for castings.
This Standard applies to magnesium alloy ingots for castings for magnesium alloy
castings1) (hereinafter referred to as ingots).
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 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
3 Requirements
3.1 Alloy designations of ingots
3.1.1 The alloy designation is expressed in the form of two English letters, two numbers
and one English letter. Examples are as follows.
3.1.4 The last English letter of the alloy designation is the identification code, which is
used to identify different alloy ingots with different specific compositions or slight
differences in element content.
3.2 Chemical composition
3.2.1 The chemical composition of magnesium alloy ingots for castings shall comply
with the provisions of Table 2.The limit values are expressed as follows.
3.2.2 If the buyer requests to adjust the limit values of elements specified in Table 2, or
has requirements for other impurity elements not specified in the table, it can be
negotiated with the supplier separately.
4 Test methods
4.1 Chemical composition analysis method
The arbitration analysis method of the chemical composition of ingots shall be carried
out according to the provisions of GB/T 13748.
4.2 Appearance quality inspection method
The surface quality of ingots is checked visually.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The ingots shall be inspected by the technical supervision department of the
supplier to ensure that the product quality complies with the provisions of this Standard
(or order contract), and a quality certificate shall be filled out.
5.2 Batching
The ingots shall be submitted for acceptance in batches. Each batch shall consist of
alloy ingots of the same designation and the same melting furnace.
5.3 Inspection items
Each batch of ingots shall be inspected for chemical composition, appearance quality,
and inspection items (microstructure, mechanical properties, salt spray corrosion
performance) required by the contract. If necessary, it is provided to the buyer for
dreference, with a retrospective period of 1 year.
5.4 Sampling and sample preparation
5.4.1 Sampling and sample preparation of test pieces for chemical composition
analysis
5.4.3 Sampling of microstructure, mechanical properties and salt spray corrosion
performance
The sampling of microstructure, mechanical properties and salt spray corrosion
performance of ingots shall be determined through negotiation between the supplier
and the buyer.
5.5 Determination of inspection results
5.5.1 When the arbitration analysis results of the chemical composition do not comply
with the provisions of this Standard, the batch shall be determined to be unqualified.
5.5.2 When the appearance quality does not comply with the provisions of this Standard,
the batch is determined to be unqualified. But it is allowed to inspect one by one by the
supplier, and the qualified ones will be delivered.
5.5.3 When the microstructure, mechanical properties and salt spray corrosion
performance are unqualified, take double the quantity of test pieces to repeat the
inspection.
6 Marking, packaging, transportation, storage and quality certificate
6.1 Marking
6.1.1 The surface of each ingot shall be clearly marked with the alloy designation,
melting furnace number and trademark.
6.1.2 The packaging shall be marked with.
6.2 Packaging, transportation and storage
6.2.1 Unless otherwise required by the buyer, the packaging method of ingots shall be
determined by the supplier. The packaging method shall fully consider the capability of
the shipping equipment and the anti-damage capability of the packaging during
transportation.
6.2.2 The ingots are stacked, stored and transported according to the designation.
6.2.3 The ingots shall be transported by vehicles with rain-proof equipment and clean
carriage.
6.3 Quality certificate
Each batch of products shall be accompanied by a quality certificate indicating.
7 Contents of order form (or contract)
The order form (or contract) for the ingots listed in this Standard shall include the
following contents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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