2124

EN AW / AlCu4Mg1 / 2124 / T351 / T851

Chemical Properties % Value
Silicon (Si)0,00 - 0,20
Chromium (Cr)0,00 - 0,10
Manganese (Mn)0,30 - 0,90
Magnesium (Mg)1,20 - 1,80
Copper (Cu)3,80 - 4,90
Titanium (Ti)0,00 - 0,15
Iron (Fe)0,00 - 0,30
Zinc (Zn)0,00 - 0,25
Aluminium (Al)Balance
Physical Properties Value
Density2.78 g/cm³
Thermal Expansion21.9 x 10^-6 /K
Modulus of Elasticity71 GPa

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 %
Over 38.1 up to & incl. 50.8 393 MPa 455 MPa %5
Over 50,8 up to & incl. 76,2 393 MPa 448 MPa %4
Over 76,2 up to & incl. 101,6 386 MPa 448 MPa %4
Over 101,6 up to & incl. 127 379 MPa 441 MPa %4
Over 127 up to & incl. 152,4 372 MPa 434 MPa %4