Grade 6061
Old Grade
Corresponding Standard GB /T 3191-2019
Extrusion rods and bars of aluminium and aluminium alloys
Classification Aluminum and Aluminum Alloys
6061 Mechanical Properties
condition Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
Bar; d≤150 6061T6 T6、T6510、T6511 ≥260 ≥240 ≥8 95
Bar; d≤150 6061T6510 T6、T6510、T6511 ≥260 ≥240 ≥8 95
Bar; d≤150 6061T6511 T6、T6510、T6511 ≥260 ≥240 ≥8 95
Bar; d≤150 6061T4 T4、T4510、T4511 ≥180 ≥110 ≥15 65
Bar; d≤150 6061T4510 T4、T4510、T4511 ≥180 ≥110 ≥15 65
Bar; d≤150 6061T4511 T4、T4510、T4511 ≥180 ≥110 ≥15 65
① O = annealed ;
② H = work hardened;
③ T6 = solution heat treated + artificial aged;
④ T1 = high temperature molding + natural aged;
⑤ T3 = after solution heat treated, cold processing, and then natural aged to a basically stable;
⑥ T4 = after solution heat treated, natural aged to a basically stable;
⑦ T5 = cooled by high temperature molding, and then artificially aged to a basically stable;
⑧ T7 = after solution heat treated, overaged;
⑨ T8 = after solution heat treated, cold processing , and then artificial aged
◎ d = round rod diameter or thickness of square rod or hexagonal rod, t = square rod or hexagonal rod thickness, unit mm

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