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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.


200 Series: 201, 206, 224, 242
300 Series: 319, 336, 354, C355, A356, 357, NASA 398, 390
850, 852 Al-Tin

Alcoa 351 SupraCast™ for cylinder heads and engine blocks.
Alcoa A354 VersaCast™ for structural applications.

Aluminum – Cerium Alloy: Non-heat treated, superior strength at 315C, and outstanding corrosion resistance

Heat Treatment

All heat treatment 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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