6005A aluminium alloy
Chemical composition
Nominal composition of 6005A aluminium alloy
Al-0,7Si-0,6Mg-MnCr
The standard composition of 6005A aluminium alloy
See Figure 1.
Figure 1 – The fragment of Table 6 from EN 573-3
The designations of 6005A aluminium alloy
- EN 573-3: EN AW-6005A и EN AW-Al SiMg (A)
- Teal Sheats – Aluminum Association: 6005A
- Unified Numbering System (UNS): А96005A
- ISO 209: 6005A
- DIN 1725-1 (canceled): AlMgSi0.7
Metallurgical characteristics
- Wrought
- Heat-treatable
- An average level of strength
- The strengthening component is the intermetallic compound Mg2Si.
- When the proportion of the nominal chemical composition of this compound is 0,9 %, wherein the excess silicon content is 0,4 %.
- Manganese and chromium provide resistance to crystallization [2].
- Typical temper – T6: extruded sections are cooled with water after heating for quenching at 530 ºC and artificial aging at 175 ° C within 8 hours [2]
- Figure 2 shows the relationships of 6005A aluminium alloy with other alloys 6xxx series.
Figure 2 – The most used 6xxx seriesaluminium alloys [3]
Typical applications
- Extruded profiles and pipes, which require a higher level of strength, than can provide 6063 alloy
- Stairs
- Frame details, seats and suspension of passenger cars
Mechanical properties
Figure 3 – Requirements for the mechanical properties of pressed products from 6005A aluminium alloy according to EN 755-2
Physical properties
Density
- 2,70 g / cm3 at 20 °C
Thermal properties
Interval melting temperature
- 605 to 655 °C
Coefficient of thermal expansion
23,6 μm / (m °C) in the range from 20 to 100 °C.
Technological properties
- Compressibility: medium
- Machining by cutting: medium to mediocre
- Weldability: good
- Formability: medium
Alloy modification
- 6005 alloy, basic
- 6005B alloy.
Sources:
- Aluminum and Aluminum Alloys, ed. J. R. Devis – AMS International, 1993
- Aluminium & Car: design, technology, innovation – Edimet Spa, 2005
- Influence of Al Microstructure on Hard Anodising Quality – Profile Material / Tom Hauge, Hydro Aluminium, Norway – 2014