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2618 / 2618A

AIR 9048.150 / AlCu2Mg1.5Ni / 2618 / 2618A / H28

Chemical Properties % Value
Silicon (Si)0,00 - 0,25
Tin (Sn)0,00 - 0,05
Manganese (Mn)0,00 - 0,20
Magnesium (Mg)1,20 - 1,80
Copper (Cu)1,20 - 1,80
Lead (Pb)0,00 - 0,05
Titanium (Ti)0,00 - 0,20
Iron (Fe)0,90 - 1,40
Zinc (Zn)0,00 - 0,15
Nickel (Ni)0,80 - 1,40
Aluminium (Al)Balance
Physical Properties Value
Density2.77 g/cm³
Melting Point549 °C
Thermal Expansion21.7 x 10^-6 /K
Modulus of Elasticity71 GPa
Thermal Conductivity160 W/m-K

A medium to high strength alloy with, dependent upon temper, minimum Proof Stress up to 57 ksi / 390 Mpa and minimum Tensile Strength up to 66 ksi / 455 MPa

ALLOY DESIGNATIONS

Aluminium alloy QQ-A-250/4 has similarities to the following standard designations and specifications but may not be a direct equivalent:

AMS 4035, Alloy 2024, UNS A92024

TEMPER TYPES

Alloy QQ-A-250/4 is supplied in a wide range of tempers:
T351 is intended to provide material with low residual stresses and thus minimal distortion during machining, but does not provide optimal corrosion resistance.

  • O - Soft
  • T3 - Solution heat treated, cold worked and naturally aged
  • T42 - Solution heat treated and naturaly aged to a substantially stable condition
  • T81 - Solution heat treated, cold worked then artificially aged
  • T351 - Solution heat treated then stress relieved by stretching. Equivalent to T4 condition.
  • T4 - Solution heat treated and naturaly aged to a substantially stable condition
  • T62 - Solution heat treated then artificially aged by the user
  • T851 - Solution heat treated then stress relieved by stretching then artificially aged.
  • T361 - Solution heat treated then stress relieved by stretching.
  • T72 - Solution heat treated then specially artificially aged for resistance to stress corrosion
  • T861

SUPPLIED FORMS

Alloy QQ-A-250/4 T351 s supplied in plate and sheet

  • Plate
  • Sheet
DELIVERY:
Mechanical Properties
Thickness (mm) Proof Strength (Min.) Yield Strength (Min.) Elongation A50 mm %
Up to & incl. 10 Min 320 MPa Min 400 MPa %5
Up to & incl. 10 Min 340 MPa Min 420 MPa %5