Are you sure you have the alloy designation correct?  I can find no such grade in either ASM HANDBOOK Volume 2, or in The Aluminum Association "pink sheets", Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot, Feb 1999 revision.  I guess it is possible that this is one of the newer Mg-containing alloys developed by Aluminium Rheinfelden, and I just don't have the most recent version of the pink sheets.  Verify that the designation is correct, and I will look into this some more.

I found the following information:

Designation: A444.2, UNS A14442
Description: Aluminium Alloy, Aluminum Foundry Alloy
Form: Ingot
Specified in: PROPRIETARY
Country (Matl): United Kingdom (UK)
Chemical Comp.
Elements    Min %    Max %    
Al        Remainder        
Si              6.5    7.5    
Fe              0.12    
Cu              0.05    
Mn              0.05    
Mg              0.05    
Zn              0.05    
Ti              0.20    
Others Each     0.05    
Others Total    0.15    

Notes:
This grade is a proprietary aluminium alloy produced by A. Cohen & Co plc in the form of ingot.
This grade is manufactured to the following American standard:
ASTM B 179: A444.2, UNS A14442.

Perhaps TVP can find the material properties from these specifications.

Best regards,

Matthew Ian Loew

This alloy is a strange one, i can find a chemical analysis for it from matweb, but no mechanical data, this is the material used by an american company, that we are doing work for. They state 444.2 on their drawings, but we can find no other data listed in any material site.

the figures they quote are roughly 24ksi uts and 20 elongation. From the test bars we have pulled, the elongation is correct.