How to artificially age 319 aluminum alloy?

We have looked high and low on the internet and can't find out how to artificially age a permanent mold cast 319 alloy. We don't have any databooks but thought someone here might know. From what we can find it's done at a low temperature, maybe 300 F but we have no idea how long or if that temperature is actually correct...

Thanks!
Jason

If you go to matweb.com you can find about 5 or 6 different entries for 319.

For 319.0-T6 one shows

Melt Temperature 677 - 816 °C 1250 - 1500 °F
Solution Temperature 502 - 507 °C 935 - 945 °F hold at temperature 8 hr, cool in water at 150 to 212°F
Aging Temperature 152 - 157 °C 305 - 315 °F hold at temperature 2 - 5 hr
Casting Temperature 677 - 788 °C 1250 - 1450 °F

A "milspec" doc on heat treating of aluminum shows 319 having a solution temp of 920-950F with 6-18 hours and T4 achieved after natural aging. T6 it says is 300-320F for 1-6 hours.

"2/ The time at temperature will ‘dependon time required for load to reach
temperature. The times shown are based on rapid heating with soaking
time measured from the time the load reached the minimum temperature
shown."

I think there is a link to that in another thread but I pushed a copy of that up on my website here

cheers,
Michael

On some allloys there is a very short time (measured in seconds) allowed between in the furnace and in the quench tank. That is why there are drop bottom furnaces in this business.

John Oder

Thanks for the information, that was exactly what we needed!

Jason