6061 and 6063 Structural Shapes

6061 alloy is the accepted alloy for structural shapes and in the (-T6) condition the strength is approximately equal to that of structural steel. It combines high strength, good workability, weldability, and corrosion resistance, making it popular for a wide variety of uses. 6061 angles and channels have an inside radius for strength. 6063 alloy offers the best compromise of all commercial alloys for extrudability, strength and cost, excellent corrosion resistance, formability, weldability, surface appearance, and good strength. It has excellent finishing characteristics and will anodize well for color match with 3003 and 5052. Often referred to as architectural angle and channel, it has sharp corners, both inside the structural shape and out.

ANALYSIS

 Manganese (Mn)Silicon (Si)Chromium (Cr)Copper (Cu)Iron (Fe)Zinc (Zn)Magnesium (Mg)Titanium (Ti)
60610.150.4-0.80.15-0.350.15-0.40.70.250.8-1.20.15
606300.2-0.80.10.10.350.10.45-0.90.1

Note: trace elements of 0.005 are present totaling 0.15% of weight Remainder of above: Aluminum 6061 Structurals conform to ASTM B308, QQ-A-200/16 6063 Structurals conform to ASTM B221, AMS 4156, QQ-A-200/9

MECHANICAL PROPERTIES

ConditionTensile Strength (PSI)Yield Strength (PSI)Shear Strength (PSI)Elongation in 2"Brinell Hardness
6061 Structural45,00040,00030,0001795
6063 Structural27,00021,00017,0001260

The above values are average and may be considered as representative of 6061 and 6063 Structural Aluminum

APPLICATIONS

Used for general structural purposes. 6061 most widely used for scaffolding, ship construction, transmission towers, truck trailers, machine parts, and furniture applications. 6063 is used extensively for architectural molding and trim, furniture, window and door construction, etc.

MACHINEABILITY AND WELDABILITY

6061 in the T4 condition has a machinability rating of 90% when compared to 2011 at 100%. Machines to a high finish.
6063 in the T4/T6 condition has a machinability rating of 80% when compared to 2011 at 100%

6061 and 6063 can be readily welded using all the common welding techniques.

TOLERANCES

Permissible Variations in Cross Section for Aluminum Structural Shapes

Shape Nominal Dimensions Toleranceª

Inches of percent of nominal allowable deviation

Angles Thickness ± 2-1/2%, +0.010" min.
Flange Width ± 2-1/2%, +1/16" min.
Channels Thickness ± 2-1/2%, +0.010" min.
Flange width ± 4%
Depth +3/32", -1/16"

ª Inches or percent of nominal

Angularity

Nominal leg, web, or flange thickness whichever least (in)
 
Tolerance Degrees plus or minus
Allowable deviation from 90 degrees
Under 0.188 2
0.188 - 0.749 1-1/2
.75 and over 1

Twist

Specified width or depth, whichever is greater
 
Tolerance Degrees plus or minus
Allowable deviation from 90 degrees
Per Foot Per Length
Under 1.500" 1° x length (ft)
1.500 - 2.999" 1/2° 1/2° x length (ft); 5°
3.000 and over 1/4° 1/4° x length (ft); 3°

FLATNESS

Depth (max) = 0.004" x Width
Allowable deviation from flat;
0.004 inch per inch of width;
0.004 inch minimum
 

STRAIGHTNESS

Allowable deviation from straight

Up thru 5 feet:  0.125"
Over 5 feet:  Length, ft X 0.025"

CORNER AND FILLET RADII

Specified Radius (in) Tolerance (in)

Allowable deviation from specified radius

Sharp Corners ± 1/64"
Under 0.188 ± 1/64"
0.188 and over ± 10%

SPEEDY METALS ITEMS

1/8" {A} x 3/4" {B} x 3/4" {C} Angle 6061-T6 Aluminum, Extruded 1/8" {A} x 1" {B} x 1" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 1" {B} x 1" {C} Angle 6061-T6 Aluminum, Extruded
1/4" {A} x 1" {B} x 1" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 1-1/4" {B} x 1-1/4" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 1-1/4" {B} x 1-1/4" {C} Angle 6061-T6 Aluminum, Extruded
1/8" {A} x 1-1/4" {B} x 1-1/4" {C} Angle 6061-T6 Aluminum, Extruded 1/8" {A} x 1-1/2" {B} x 1-1/2" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 1-1/2" {B} x 1-1/2" {C} Angle 6061-T6 Aluminum, Extruded
1/4" {A} x 1-1/2" {B} x 1-1/2" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 1-1/2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded 1/8" {A} x 1-1/2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded
1/8" {A} x 1-3/4" {B} x 1-3/4" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 1-3/4" {B} x 1-3/4" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded
1/8" {A} x 2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 2" {B} x 2" {C} Angle 6061-T6 Aluminum, Extruded
1/4" {A} x 2" {B} x 2-1/2" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 2" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 2" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded
3/8" {A} x 2" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 2-1/2" {B} x 2-1/2" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 2-1/2" {B} x 2-1/2" {C} Angle 6061-T6 Aluminum, Extruded
1/4" {A} x 3" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded 3/16" {A} x 3" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 3" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded
1/2" {A} x 3" {B} x 3" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 3" {B} x 4" {C} Angle 6061-T6 Aluminum, Extruded 1/4" {A} x 3" {B} x 4" {C} Angle 6061-T6 Aluminum, Extruded
3/8" {A} x 3" {B} x 5" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 4" {B} x 4" {C} Angle 6061-T6 Aluminum, Extruded 1/2" {A} x 4" {B} x 4" {C} Angle 6061-T6 Aluminum, Extruded
1/4" {A} x 4" {B} x 4" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 4" {B} x 6" {C} Angle 6061-T6 Aluminum, Extruded 3/8" {A} x 5" {B} x 5" {C} Angle 6061-T6 Aluminum, Extruded
1/2" {A} x 6" {B} x 6" {C} Angle 6061-T6 Aluminum, Extruded 1/2" {A} x 8" {B} x 8" {C} Angle 6061-T6 Aluminum, Extruded 1/8" {A} x 1/2" {B} x 1/2" {C} Angle 6063-T52 Aluminum, Extruded
1/16" {A} x 1/2" {B} x 1/2" {C} Angle 6063-T52 Aluminum, Extruded 1/8" {A} x 3/4" {B} x 3/4" {C} Angle 6063-T52 Aluminum, Extruded 1/8" {A} x 1" {B} x 1" {C} Angle 6063-T52 Aluminum, Extruded
1/16" {A} x 1" {B} x 1" {C} Angle 6063-T52 Aluminum, Extruded 1/8" {A} x 1" {B} x 1-1/2" {C} Angle 6063-T52 Aluminum, Extruded 1/8" {A} x 1" {B} x 2" {C} Angle 6063-T52 Aluminum, Extruded
1/4" {A} x 1-1/2" {B} x 1-1/2" {C} Angle 6063-T52 Aluminum, Extruded 1/8" {A} x 1-1/2" {B} x 1-1/2" {C} Angle 6063-T52 Aluminum, Extruded 1/4" {A} x 2" {B} x 2" {C} Angle 6063-T52 Aluminum, Extruded
1/8" {A} x 2" {B} x 2" {C} Angle 6063-T52 Aluminum, Extruded 3/16" {A} x 2" {B} x 2" {C} Angle 6063-T52 Aluminum, Extruded 1/4" {A} x 2" {B} x 3" {C} Angle 6063-T52 Aluminum, Extruded
1/4" {A} x 3" {B} x 3" {C} Angle 6063-T52 Aluminum, Extruded 3" {A} x 1.410" {B} x 0.170" {C} Channel 6061-T6 Aluminum, Extruded 4" {A} x 1.580" {B} x 0.180" {C} Channel 6061-T6 Aluminum, Extruded
3" {A} x 1.596" {B} x 0.356" {C} Channel 6061-T6 Aluminum, Extruded 5" {A} x 1.885" {B} x 0.325" {C} Channel 6061-T6 Aluminum, Extruded 6" {A} x 1.920" {B} x 0.200" {C} Channel 6061-T6 Aluminum, Extruded
1" {A} x 1/2" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded 2" {A} x 1/2" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded 3/4" {A} x 3/4" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded
1" {A} x 1" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded 1-3/4" {A} x 1" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded 2" {A} x 1" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded
1-1/4" {A} x 1-1/4" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded 2-1/2" {A} x 1-1/2" {B} x 1/8" {C} Channel 6063-T52 Aluminum, Extruded