Back (Al-Base)

EN AW-6061 | AlMg1SiCu

Numeric designationEN AW-6061
Chemical designationAlMg1SiCu
Etching10% NaOH, Barker

Age-hardenable alloy, here in the extruded state.

NaOH etching reveals large recrystallised grains, but also clear segregation lines. The area surrounding large precipitates is depleted in alloying elements and free of fine precipitates, which is why stripes remain white here during etching.


  • 20 V d-c
  • 120 s
  • V2A cathode