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QC/T 273-2025: Technical specifications of aluminum-alloy die casting for automobiles
Status: Valid QC/T 273: Evolution and historical versions
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| QC/T 273-2025 | English | 359 |
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Technical specifications of aluminum-alloy die casting for automobiles
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QC/T 273-2025
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| QC/T 273-1999 | English | 319 |
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(Automotive zinc alloy, aluminum alloy, copper alloy die castings)
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QC/T 273-1999
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Basic data | Standard ID | QC/T 273-2025 (QC/T273-2025) | | Description (Translated English) | Technical specifications of aluminum-alloy die casting for automobiles | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T04 | | Classification of International Standard | 43.020 | | Word Count Estimation | 18,157 | | Date of Issue | 2025-05-09 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | QC/T 273-1999 | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | QC/T 273-2025: Technical specifications of aluminum-alloy die casting for automobiles---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/QCT273-2025
Automobile Industry Standards of the People's Republic of China
Replaces QC/T 273-1999
2025-05-09 Release
2025-11-01 Implementation
CCS T 04
ICS 43.020
Ministry of Industry and Information Technology of the People's Republic of China issued
Technical requirements for aluminum alloy die castings for automobiles
Technical specifications of aluminum‑alloy die casting for automobiles
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Heat treatment status code 2
5 Die casting classification 2
6 Technical Requirements 3
7 Test Methods 5
8 Inspection and Evaluation 6
9 Logo, packaging 8
Appendix A (Informative) Commonly used die-casting aluminum alloy composition requirements 9
Appendix B (Informative) Mechanical Properties of Commonly Used Die-cast Aluminum Alloys 11
Appendix C (Normative) Porosity and Maximum Pore Size Testing of Die Casting Machined Surface and Metallographic Sections 12
Table of Contents
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces QC/T 273-1999 "Technical Specifications for Automotive Zinc Alloy, Aluminum Alloy and Copper Alloy Die Castings" and is compatible with QC/T 273-
Compared with.1999, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Deleted the relevant technical requirements for zinc alloy and copper alloy die castings from the scope (see Chapter 1 of the.1999 edition);
b) Added terms and definitions (see Chapter 3);
c) Added heat treatment condition code (see Chapter 4);
d) Added the classification of die castings (see Chapter 5);
e) Added die casting method and heat treatment state (see 6.1);
f) The expression of chemical composition requirements has been changed (see 6.2, 3.1 of the.1999 edition);
g) The mechanical property requirements have been changed (see 6.3, 3.2 of the.1999 edition);
h) Added metallographic structure requirements (see 6.4);
i) The tolerance requirements for shape, size and weight have been changed (see 6.5, 3.3, 3.4 and 3.7 of the.1999 edition);
j) The surface quality requirements have been changed (see 6.6, 3.5 of the.1999 edition);
k) added internal quality requirements (see 6.7);
l) Added airtightness requirements for die castings (see 6.8);
m) The chemical composition, mechanical properties and dimensional inspection requirements have been changed (see 7.1, 7.2, 7.4, Chapter 4 of the.1999 edition);
n) Added requirements for metallographic testing, surface quality, internal quality testing and airtightness testing (see 7.3, 7.5, 7.6 and 7.7);
o) The inspection and assessment, marking and assurance requirements have been modified (see Chapters 8 and 9, Chapters 5 and 6 of the.1999 edition);
p) Added porosity and maximum pore size testing for die casting machined surfaces and metallographic section sections (see Appendix C).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114).
This document was drafted by. Dongfeng Commercial Vehicle Co., Ltd., SAIC Motor Corporation Limited, China Aluminum Materials Application Research Institute Co., Ltd.,
Soochow University, Suzhou Die Casting Technology Association, Shanghai Weilan Power Technology Co., Ltd., Chongqing Meilixin Technology Co., Ltd., Ningbo Tuopu
Auto Parts Co., Ltd., Shanghai Weilai Automobile Co., Ltd.
The main drafters of this standard are. Shao Baiming, Lei Jian, Ni Lei, Chu Hongmei, Ye Qingliang, Yuan Haibo, Li Nan, Zhong Gu, Zhang Hai, Zhang Shangen, Chang Yiqian,
Xu Cheng, Wang Yongxin, Wang Chenyang, Wang Zhifeng, and Tang Xuan.
The previous versions of this document and the documents it replaces are as follows.
--First published in 1989 as ZB T 05002-1989;
--First revised in.1999 as QC/T 273-1999;
--This is the second revision.
Technical requirements for aluminum alloy die castings for automobiles
1 Scope
This document specifies the technical requirements, inspection methods, inspection rules, marking and packaging of aluminum alloy die castings.
This document applies to aluminum alloy die castings for automobiles.
2 Normative references
The contents of the following documents constitute the essential terms of this document through normative references in this document.
The version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.
GB/T 228.1 Tensile tests on metallic materials Part 1.Room temperature test methods
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1.Test method
GB/T 6060.3 Surface roughness comparison specimens Part 3.Surfaces processed by electric spark, shot blasting, sand blasting, grinding, filing and polishing
GB/T 6414 Dimensional tolerances, geometrical tolerances and machining allowances for castings
GB/T 7999 Photoelectric direct reading emission spectroscopy analysis method for aluminum and aluminum alloys
GB/T 11351 Casting Weight Tolerance
GB/T 13298 Metal microstructure examination methods
GB/T 13822 Die-cast nonferrous alloy test specimens
GB/T 15056 Method for evaluating casting surface roughness
GB/T 15114 Aluminum alloy die castings
GB/T 20975 (all parts) Chemical analysis methods for aluminium and aluminium alloys
GB/T 36589 Industrial computerized tomography (CT) testing of castings
JB/T 7946.2 Metallography of Cast Aluminum Alloys Part 2.Overburning of Cast Aluminum-Silicon Alloys
HB/Z 61 Penetrant Testing
ISO 3522 Aluminium and aluminium alloys-Castings- Chemical composition and mechanical properties
Chemical composition and mechanical properties)
JIS H5302 Aluminum alloy die castings
ASTM B85/B85M Standard specification for aluminium‑alloy die castings
ASTM E505 Standard reference radiographs for inspection of aluminum and magnesium die castings
aluminum and magnesium die castings)
EN 1706 Aluminium and aluminium alloys-Castings-Chemical composition and mechanical properties
Chemical composition and mechanical properties)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
high stress zone
The area in the die casting stress CAE analysis cloud diagram where the value is greater than or equal to 60% of the material's minimum yield strength.
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