Wrought aluminium and aluminium alloys — Cold-drawn rods/bars, tubes and wires — Part 2: Mechanical properties
1Key Takeaways
This document specifies the mechanical properties of wrought aluminium and aluminium alloy rods/ bars, tubes and wires for general engineering applications (except aeronautical rivets). It is applicable to products which are extruded and then cold drawn. It does not apply to: — products which are rolled and then cold …
2Expert Interpretation
In-depth analysis of the mechanical property requirements for cold-drawn aluminum and aluminum alloy bars, tubes and wires in the ISO 6363-2:2022 international standard, covering key indicators such as tensile strength, yield strength, elongation, etc. of alloys such as 1050-7075, comparing the differences between the new and old versions and providing engineering application suggestions.
Analysis of the core content of the standard
ISO 6363-2:2022 third edition replaces the 2012 edition. The main technical changes include:
- New mechanical property data of 2033 and 6026 alloys
- Added ISO 6362-7 (alloy composition) and ISO 2107 (state code) as referenced standards
- Comprehensive revision of test methods and expression specifications
Comparison of mechanical properties
| Alloy grade | State | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|---|
| 1050 | O | 60-100 | 20(max) | 25(A50mm) |
| 2024 | T3 | 425 | 290-310 | 7-10 |
| 6061 | T6 | 290 | 240 | 10 |
| 7075 | T6 | 520-540 | 460-485 | 5-9 |
Key Test Methods
Tensile Test Specifications
According to ISO 6892-1 or ASTM B557M, two gauge lengths are available for elongation measurement:
- A: 5.65√S₀ ratio gauge length
- A50mm: fixed 50mm gauge length
The test results are processed according to the rounding rules in Appendix A, accurate to the decimal places specified in the standard.
Engineering Application Recommendations
Material Selection Guide
- High strength requirements: Prioritize 7xxx series (such as 7075-T6)
- Forming: Select 3xxx or 5xxx series annealing state (O state)
- Corrosion resistance environment: Recommend 5xxx series alloys (such as 5083-H111)
Special state instructions
Note for T42/T62 state: This is applicable when the user performs solution treatment + natural/artificial aging on the basis of O-state material. If there is cold/hot deformation during the processing, the mechanical properties may be lower than the standard value.
Standard Evolution Analysis
Compared with the 2012 version, the main technical advances of the 2022 version are reflected in:
- Added T3/T351/T8 state performance data for 2033 alloy
- 6026 alloy adds three heat treatment states of T6/T8/T9
- Improved the annotations for special states such as T39/T89