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6061-T6 aluminium standard heat treating process T6 temper 6061 has been treated to provide the maximum precipitation hardening (and therefore maximum yield strength) for a 6061 aluminium alloy. It has an ultimate tensile strength of at least 290 MPa (42 ksi) and yield strength of at least 240 MPa (35 ksi).
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]
Brinell hardness Bending change resistance/MPa EN AW-6005 AlSiMg T5 69500 26500 255 280 11 85 n.b. EN AW-6005A AlSiMg(A) T1 69500 26200 100 200 25 52 n.b. T4 69500 26200 110 210 16 60 n.b. T5 69500 26200 240 270 13 80 n.b. T6 69500 26200 260 285 12 90 n.b. EN AW-6008 AlSiMgV T6 69500 26200 255 285 14 90 n.b. EN AW-6056 AlSi1MgCuMn T78 69000 25900
6082 aluminium alloy is an alloy in the wrought aluminium-magnesium-silicon family (6000 or 6xxx series). It is one of the more popular alloys in its series (alongside alloys 6005 , 6061 , and 6063 ), although it is not strongly featured in ASTM (North American) standards.
Microstructure characterization of 7055-T6, 6061-T6511 and 7A52-T6 Al alloys subjected to ballistic impact against heavy tungsten alloy projectile; Grain size prediction and investigation of 7055 aluminum alloy inoculated by Al–5Ti–1B master alloy,Journal of Alloys and Compounds - X-MOL; ShieldSquare Captcha
The hardness may also be shown as XXX HB YYD 2. The XXX is the force to apply (in kgf) on a material of type YY (5 for aluminum alloys, 10 for copper alloys, 30 for steels). Thus a typical steel hardness could be written: 250 HB 30D 2. It could be a maximum or a minimum.
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The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [ 1 ]
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