Aluminum Alloy & Heat Treat

Pentz quality starts with procuring USA produced pure primary alloys to build high strength high integrity castings.

Aluminum Alloy Metals at Pentz are all rotary degassed and flux injected to assure extremely low oxides and hydrogen porosity in all molten metal and tested using specific gravity to measure quality standards are met and recorded before pouring all customer castings.

In-house Spectro- chemical analysis confirms chemistry of all alloys meet the strictest customer requirements.

Process control and quality control is proven with in- house NDT Philips Real-Time X-Ray and Test Bars.

Pentz collaborates with customers in alloy selection best suited for your project to achieve high performance, high quality and manufacturability.

Our expertise with 535 Aluminum Alloys producing castings of high quality, integrity, 10% elongation, superior corrosion resistance, great machinability, polishing, and excellent anodized appearance. No heat treatment is required as it is self-aging and dimensionally stable. Taking 535 alloys to further increase dimensional stability is accomplished taking 535 alloy to T5 and cooling in still air for high performance castings as customer applications require.

Pentz can procure a wide range of Aluminum Alloys for customer projects and production upon request.

We heat treat your castings and can water or air quence to meet your mechanical property requirements by adjusting our heat treat specifications.

See our Aluminum Alloy Selection Guide.


Heat Treat Designations / Descriptions

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


Heat Treat Definitions

Annealing:  Heating castings to increase ductility, which allows for straightening before heat treat   
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.