Alloy & Temper Specifications


Extrusion Tempers
O Fully Annealed
T1 Cooled from an elevated temperature and naturally aged.
T4 Solution heat-treated and naturally aged.
T5 Cooled from an elevated temperature and naturally aged.
T52 Solution heat-treated and naturally aged.
T54 Solution heat-treated and naturally aged.
T6 Solution heat-treated and naturally aged.
T61 Solution heat-treated and naturally aged.

Mechanical Property Limits


Alloy & Temper Spec. Diameter or Thickness In. Webster Tensile Strength Ultimate - ksi Tensile Strength Yield - ksi Elongation
Min. Max. Min. Max.
6063-0 All 0 19 18
6063-T1 Up thru .500 1 to 5 17 9 12
.501-1.000 16 8 12
6063-T4 Up thru .500 3 to 7 19 10 14
.501-1.000 18 9 14
6063-T5 Up thru .500 7 or better 22 16 8
.501-1.000 21 15 8
6063-T52 Up thru 1.000 7 to 11 22 30 16 25 8
6063-T6 Up thru .124 12 or better 30 25 8
.125-1.000 30 25 8
6005A-T1 Up thru .249 5 or better 25 14.5 15
6005A-T5 Up thru .249 15 or better 38 31 7
.250-.999 38 31 9
6005A-T61 Up thru .249 15 or better 38 35 8
.250-1.00 38 35 10
6061-T1 Up thru .625 9 or better 26 14 16
6061-T4 All 9 or better 26 16 16
6061-T6 Up thru .249 15 or better 38 35 8
.250 and over 38 35 10

6063 Alloy Specification


SI FE CU MN MG CR ZN TI Each Other Total Aluminum Content
.20-.6 .35 .10 .10 .45-.9 .10 .10 .10 .05 .15 Remainder
*See Footnotes Below


6005A Alloy Specification


SI FE CU MN MG CR Each Other Total Aluminum Content
.50-.90 .35 .30 .50 .40-.70 .30 .05 .15 Remainder
*See Footnotes Below


6061 Alloy Specification


SI FE CU MN MG CR ZN TI Each Other Total Aluminum Content
.40-.80 .70 .15-.40 .15 .80-1.2 .04-.35 .25 .15 .05 .15 Remainder
*See Footnotes Below

  • SI - Silicon
  • FE - Iron
  • CU - Copper
  • MN - Manganese
  • MG - Magnesium
  • CR - Chromium
  • ZN - Zinc
  • TI - Titanium
  • All compositions in percent maximum unless shown as a range or a minimum.