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 |
Density | 2.78 g/cm³ |
Thermal Expansion | 21.9 x 10^-6 /K |
Modulus of Elasticity | 71 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
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 |