The correspondence between China aluminum rod standards and international standards is mainly reflected in two aspects: product standards and grade systems.
China Core Aluminum Rod Product Standards
|
Standard Type |
Core Standard | Production Process | Scope of Application |
Remarks |
| National Standard (GB/T) | GB/T 3191-2019 | Extrusion | Round, square, hexagonal, and other extruded bars | The current latest version, replacing GB/T 3191-2010. |
| Industry Standard (YS/T) | YS/T 624-2019 | Drawing (Cold Drawn) | General industrial use drawn round, square, and flat bars | Suitable for applications requiring high dimensional accuracy and surface finish. |
| Specialized Standard (GB/T) | GB/T 26006-2010 | Extrusion | Marine aluminum alloy extruded tubes, bars, and profiles | For the shipbuilding and offshore engineering sector. |
| Specialized Standard (GB/T) | GB/T 33366-2016 | Extrusion | Aluminum alloy extruded bars for electronic cabinets | For specific industrial uses. |
Note: The previous edition of GB/T 3191-2010 was explicitly “non-equivalently adopted” from the American standard ASTM B221M:2008. The current version focuses more on alignment with international standards.
Overview of International Standard Systems
Internationally, aluminum bar product standards are primarily composed of the ISO, ASTM, and EN (European) systems.
- ISO Standard System (International Universal)
- ISO 6362 Series: Specifically for wrought aluminum and aluminum alloy extruded bars, tubes, and profiles, divided into multiple parts covering chemical composition, mechanical properties, and dimensional tolerances.
- ISO 209-1: A general fundamental standard for wrought aluminum and aluminum alloys, defining alloy series, designations, and temper codes.
- ASTM Standard System (Commonly used in the Americas)
- ASTM B221 / B221M: A classic standard for aluminum and aluminum alloy extruded bars, tubes, and profiles, widely used in the Americas, especially the United States.
- EN Standard System (Commonly used in Europe)
- EN 755 Series: The European series of standards for aluminum and aluminum alloy extruded bars, tubes, and profiles, covering technical conditions, mechanical properties, and dimensional tolerances.
Core Aluminum Rod Standards Correspondence
1. China Correspondence for Extruded Aluminum Rod: GB/T 3191-2019
As China’s primary product standard for extruded bars, the technical requirements of GB/T 3191-2019 are largely one-to-one corresponding to ISO 6362 and the EN 755 series in terms of alloy designation, temper, chemical composition, and mechanical properties. Differences may exist only in details like tolerances.
|
Chinese Standard |
Corresponding International Standard |
Relationship Explanation |
| GB/T 3191-2019 Aluminum and Aluminum Alloy Extruded Bars |
ISO 6362-2 / 7 Wrought Aluminum and Aluminum Alloy Extruded Bars |
Technical Content Correspondence: The two are essentially one-to-one counterparts in alloy designation, temper, chemical composition, and mechanical properties, and can be considered technically equivalent. |
| EN 755-1 / 2 / 3~6 / 9 Aluminum and Aluminum Alloy Extruded Bars |
Technical Content Correspondence: The EN 755 series is a technical condition for the European market, and its technical indicators are basically consistent with GB/T 3191, making them technically equivalent. | |
| ASTM B221 / B221M Aluminum and Aluminum Alloy Extruded Bars |
Historical Origin: GB/T 3191-2010 was formerly non-equivalently adopted from this standard. Although the current version does not state this, its technical content still belongs to the same system. |
2. Correspondence for Drawn Aluminum Bars: YS/T 624-2019
YS/T 624-2019, as an industry standard for drawn bars, has no completely identical counterpart standard internationally. Its technical requirements typically reference the drawn bar sections of standards like ISO 6362 and ASTM B211, but must be verified against the specific data tables for each designation and temper.
Alloy Designation System Correspondence
In addition to product standards, the correspondence of alloy designations is also crucial.
- Chinese Designation (GB): e.g., 2A12, 6061, 5083.
- International Designation (ISO): Uses a four-digit system, e.g., AlCu4Mg1 (corresponds to 2024), AlMg4.5Mn0.7 (corresponds to 5083).
- American Designation (AA/UNS): e.g., 2024, 6061, A95083 (corresponds to 5083).
- European Designation (EN AW): e.g., EN AW-2024, EN AW-6061, EN AW-5083.
Correspondence Examples:
- 2A12 (GB) ≈ AlCu4Mg1 (ISO) ≈ 2024 (AA/UNS) ≈ EN AW-2024 (EN)
- 5083 (GB) ≈ AlMg4.5Mn0.7 (ISO) ≈ A95083 (UNS) ≈ EN AW-5083 (EN)
Important Note: A “similar” designation does not mean the “standards are equivalent.” When selecting materials for engineering projects, it is essential to cross-check the specific chemical composition and mechanical property data tables in the relevant standards. Do not substitute based on designation alone.
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