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