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Alloys and Heat Treat

Aluminum Alloys & Heat Treat – Eck Industries

We Cast all Aluminums, and Composites

Eck Industries has been pouring aluminum since 1948. We pour all aluminum alloys, and aluminum composites such as Duralcan. About 50% of our volume is A356 and 355, and the next most popular are 206 and 242.

Eck is known as an innovator, developing robust processes to cast advanced alloys.  An example is A206, which we started in the 1970’s, and we have been developing best practices ever since. If you don't see the alloy you need, call us to make a specialty alloy for you.

300 series

   High Strength
 319  A357, E357     201  535 – “Almag” Stir-cast MMC using SiC, alumina, graphite
 354  359     203 (RR 350)  700 series
Preform-based MMC
 C355  390     A206  850, 852  
 A356, B356  398     224*    
 332       242    

Research & Development:

   Casting wrought alloys such as 5083, 6061, 6063, 7075

   Nano-reinforced 206 and 7075

Elevated Temperature Alloys:

   224 is most common (*)

   NASA 398 – see NASA article on high temperature fan castings

   Internal R&D on alloying, including composites

   Your alloy – what does your application need?

Example of Aluminum Molding
Finished Aluminum Casted Product Aluminum Alloy Casting Example Aluminum Casted Cylinder Head

Heat Treating

All heat treating is performed in house on castings up to 62" diameter.  We offer water and air quench and we can tailor our heat treat specifications to meet your mechanical property requirements.

Heat Treat Types

F:    As cast 
O:   Annealed 
T4:  Solution heat treated and naturally aged to a stable condition 
T5:  Cooled from an elevated temperature shaping process and then artificially aged 
T6:  Solution heat treated and then artificially aged 
T7:  Solution heat treated and overaged

Heat Treat Definitions
Annealing:  Heating castings to increase ductility, which also tends to decrease strength.   
Solution Heat Treat:  Heating castings to a suitably elevated temperature and holding at that temperature long enough to allow elements to enter into a solid solution and then cooling rapidly to maintain that solid solution.   
Aging:  Precipitation of solute atoms at room temperature (natural age) or elevated temperatures (artificial age).   
Overage: Additional aging to improve dimensional stability.


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