Luminum

Lateral Bow, Squareness And Diameter Tolerances Of Sheet & Plate



The tables below provide general information on the lateral bow, squareness and diameter tolerances of sheared flat sheet and plate and sawed flat sheet and plate.

The dimensional tolerances are based on standards published by the Aluminum Association and ANSI./p>


Lateral Bow — Flat Sheet And Plate

Allowable deviation of a side edge from a straight line

  Specified Length In Inches
 > 0  > 60  > 90  > 120  > 150  > 180  > 210
Specified
Thickness
Specified
Width
<= 60 <= 90 <= 120 <= 150 <= 180 <= 210 <= 240
Tolerance In Inches
>= 0.006 <= 0.125  > 0 <= 4 ±0.250 ±0.563 ±1.000 ±1.563 ±2.250 ±3.000 ±4.000
>= 0.006 <= 0.125 > 4 <= 10 ±0.094 ±0.219 ±0.375 ±0.563 ±0.875 ±1.156 ±1.500
>= 0.006 <= 0.125 > 10 <= 35 ±0.063 ±0.125 ±0.188 ±0.250 ±0.375 ±0.500 ±0.750
>= 0.006 <= 0.125  > 35 - ±0.032 ±0.063 ±0.125 ±0.188 ±0.250 ±0.375 ±0.500
>= 0.126 <= 0.249 > 4 <= 15 ±0.063 ±0.125 ±0.250 ±0.375 ±0.563 ±0.750 ±1.000
>= 0.126 <= 0.249 > 15 - ±0.032 ±0.063 ±0.125 ±0.188 ±0.250 ±0.375 ±0.500
>= 0.025 <= 6.000 > 0 <= 10 ±0.250 ±0.563 ±1.000 ±1.563 ±2.250 ±3.000 ±4.000
>= 0.025 <= 6.000 > 10 <= 18 ±0.063 ±0.125 ±0.250 ±0.406 ±0.594 ±0.781 ±1.000
>= 0.025 <= 6.000 > 18 - ±0.032 ±0.094 ±0.125 ±0.219 ±0.312 ±0.438 ±0.562

Squareness — Flat Sheet And Plate

Allowable difference in length of diagonals expressed in inches as multiple of width in feet

  Specified Width In Feet
 > 0  > 3
<= 3 -
Specified Length Tolerance In Inches As Multiple Of Width
>= 0 <= 12 Feet ±3/32 ±5/64
> 12 Feet - ±9/64 ±7/64

Diameter — Sheared Or Blanked Sheet And Plate Circles

Allowable deviation from specified diameter

  Specified Diameter In Inches
 > 0  > 18  > 36  > 96  > 132
<= 18 <= 36 <= 96 <= 132 <= 168
Specified Thickness Tolerance In Inches
>= 0.006 <= 0.249 ±1/32 ±3/64 ±1/16 ±1/8 ±3/16
>= 0.250 <= 0.375 - ±1/16 ±1/8 ±3/16 ±1/4
>= 0.376 <= 0.625 - ±1/8 ±3/16 ±1/4 ±3/8
>= 0.626 <= 0.875 - ±3/16 ±1/4 ±3/8 ±1/2
>= 0.876 <= 1.250 - ±1/4 ±3/8 ±1/2 ±5/8

Diameter — Sawed Sheet And Plate Circles

Allowable deviation from specified diameter

  Specified Diameter In Inches
 > 0  > 18  > 60  > 132
<= 18 <= 60 <= 132 <= 168
Specified Thickness Tolerance In Inches
>= 0.080 <= 1.000 ±1/8 ±3/16 ±1/4 ±1/2
>= 1.001 <= 3.000 ±1/4 ±3/8 ±1/2 ±3/4

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