"YZMg" means die-cast magnesium alloy, and the element symbol and value after it indicate the main alloying elements and their contents. JB/T 3070-1982 Technical Specifications for Die-cast Magnesium Alloys JB/T3070-1982 Standard download decompression password: www.bzxz.net

The First Machine Industry Department of the People's Republic of China standard technical conditions for non-ferrous die-casting alloys
Published on March 15, 1982
Implementation on October 1, 1982
Approved by the First Machine Industry Department of the People's Republic of China
JB3070-82
Technical conditions for die-casting magnesium alloys
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1 Grade and code
The First Machine Industry Department of the People's Republic of China standard technical conditions for die-casting magnesium alloys
JB3070-82
1.1 Method of writing grade
"YZMg" means die-casting magnesium alloy; the element symbol and value following it represent the main alloying elements and their content. 1.2 Code writing method
"YM" and the numbers after it represent the alloy grade. 2 Technical requirements
2.1 The grade, code, chemical composition and mechanical properties of die-cast magnesium alloys are shown in the table. Chemical composition and mechanical properties of die-cast magnesium alloys
Alloy grade
YZMgAlgZn
Alloy code
Impurity content (not more than)
Mechanical properties (not less than)
Tensile strength
Elongation
Brinell hardness
(Lg=50)/5/250/30
2.2 The mechanical properties of die-cast magnesium alloys are the cast properties measured by single-cast tensile test specimens under specified process parameters. The shape and size of the test specimen shall comply with the provisions of JB3072-82 "Non-ferrous die-casting alloy test specimens". 3 Inspection methods
3.1 Chemical composition
3.1.1 Chemical composition analysis method According to the provisions of YB87-76 "Magnesium Chemical Analysis Method", its chemical composition should comply with the table. 3.1.2 Inspection frequency of chemical composition, one group of samples per furnace. 3.1.3 If the chemical composition fails the first inspection, resampling is allowed. If it still fails, the alloy of this furnace is unqualified. 3.2 Mechanical properties
3.2.1 Tensile test is carried out in accordance with the provisions of GB228-76 "Metal Tensile Test Method", and its mechanical properties should comply with the table. 3.2.2 Brinell hardness determination According to the provisions of GB231-63 "Metal Brinell Hardness Test Method", its performance should comply with the table. 3.2.3 Determine the Brinell hardness at the clamping position of the B-type sample specified in JB3072-82 "Non-ferrous die-casting alloy sample". 3.2.4 There are three specimens in each group. If two of the three specimens fail to meet the mechanical performance requirements, the test result is considered unqualified. However, it is allowed to use doubled specimens for a second test. If two of the second tests fail but the total average value is qualified, the test result is considered qualified. If there are more than two unqualified specimens, the test result is considered unqualified. The First Ministry of Machinery Industry of the People's Republic of China issued on March 15, 1982 and implemented on October 1, 1982
Additional Notes:
JB3070-82
This standard was proposed by the Shenyang Foundry Research Institute of the Ministry of Machinery Industry and is under the jurisdiction of the Shenyang Foundry Research Institute of the Ministry of Machinery Industry. This standard was drafted by Tianjin Nonferrous Metals Foundry, Shenyang Foundry Research Institute of the First Ministry of Machinery Industry, Second Automobile Manufacturing Plant, First Automobile Manufacturing Plant, Hebei Institute of Technology, and Tianjin Electric Meter Factory. The main drafters of this standard are Kuang Yunlie, Guo Cunhou, Zhao Binghua, Jiang Zhaomeng, Yuan Xudi, Jia Shuqin, Liang Xichao, and Wang Wenyu. 8
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Technical Conditions for Nonferrous Die Casting Alloys
JB30683072-82bZxz.net
Published by Technical Standards Press
(Beijing Fuwai Sanlihe)
Printed in the Printing Workshop of Technical Standards Press
Published by Xinhua Bookstore, Beijing Distributed by the bank Sold by Xinhua Bookstores in various places*
Format 880×12301/16 Printing sheet 11/4 Word count 23.000First edition in January 1983
First printing in January 1983
Print run 1—8,000
Book number: 15169·2-4640
0Price 0.35 yuan
New Science and Technology Books
43—154
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