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Alternate names and designations include AlSiMg(A) and 3.3210. The alloy and its various tempers are covered by the following standards: [2] ASTM B 221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes; EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products.
It cannot be work hardened, but is commonly heat treated to produce tempers with a higher strength but lower ductility. [1] Alternate names and designations include AlSi1MgMn, 3.2315, H30, and A96082. The alloy and its various tempers are covered by the following standards: [2] EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate.
The retrogression and reage (RRA) temper is a multistage heat treatment temper. Starting with a sheet in the T6 temper, it involves overaging past peak hardness (T6 temper) to near the T7 temper. A subsequent reaging at 120 °C for 24 hours returns the hardness and strength to or very nearly to T6 temper levels. [10]
Different forms and tempers of 6061 aluminium alloy are discussed in the following standards: [28] ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate; ASTM B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes; ASTM B211: Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod ...
The second is referred to as temper embrittlement (TE) or two-step embrittlement. One-step embrittlement usually occurs in carbon steel at temperatures between 230 °C (446 °F) and 290 °C (554 °F), and was historically referred to as "500 degree [Fahrenheit] embrittlement."
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The temper designation follows the cast or wrought designation number with a dash, a letter, and potentially a one to three digit number, e.g. 6061-T6. The definitions for the tempers are: [5] [6]-F : As fabricated-H : Strain hardened (cold worked) with or without thermal treatment -H1 : Strain hardened without thermal treatment
Bakon USA's chocolate tempering machine simplifies the elaborate process.