What is the meaning of 4 digits of aluminum alloy brand?

It is the third and fourth digits, indicating the aluminum content.

2-8 is the third and fourth digits, which has no special meaning and is only used to distinguish other alloys.

Aluminum is divided into pure aluminum, hard aluminum, super hard aluminum, antirust aluminum and forged aluminum.

alyuminiy qotishmasi

Masalan

  • 1 series pure aluminum has the most aluminum content, reaching more than 90%
  • 2-Series hard aluminum alloy, containing copper and Cu, with high hardness
  • 3-Series antirust aluminum alloy, containing manganese and Mn, yaxshi korroziyaga chidamliligi bilan
  • 5-series antirust alyuminiy qotishmasi, manganese Mn, magnesium mg, low density and high tensile strength
  • 6-series forged aluminium alloy, magnesium mg, silicon Si, malleable (egilish)
  • 7-series superhard aluminum alloy, zinc containing Zn, Mg, Cu, mis, high hardness and high strength