Standard Corner Radius(Structural Sizes:)
Max. 3 x Nominal Wall Thickness
Mechanical Sizes |
Structural Sizes |
Largest Nominal Outside Dimension |
Outside Tolerance at all Sides at Corners |
Largest Nominal Outside Dimension |
Outside Tolerance at all Sides at Corners |
3/16 to 5/8 |
± 0.004 |
2 1/2 and under |
± 0.020 |
over 5/8 to 1 1/8 |
± 0.005 |
over 2 1/2 to 3 1/2 |
± 0.020 |
over 1 1/8 to 1 1/2 |
± 0.006 |
over 3 1/2 to 5 1/2 |
± 0.030 |
over 1 1/2 to 2 |
± 0.008 |
over 5 1/2 |
± 1% |
over 2 to 3 |
± 0.010 |
|
|
over 3 to 4 |
± 0.020 |
|
|
over 4 to 6 |
± 0.020 |
|
|
over 6 to 8 |
± 0.025 |
|
|
Straightness
Mechanical Sizes: Max. 1/16″ in 3 feet
Structural Sizes: Max. 1/8″ x Number of feet of total length divided by 5
Wall Thickness
Mechanical & Structural Sizes: ± 10% of Nominal Wall Thickness
Squareness of Sides
Mechanical Sizes: Max: ± b = c x 0.006″
b = Tolerance for out-of-square
c = Largest external dimension across flats
Structural Sizes: Adjacent sides may deviate from 90 ° by ± 2 °
Maximum Twist (Mechanical & Structural Sizes)
Largest Dimension, inches |
Max. Twist*, inches |
over 1/2 to 1 1/2 |
0.050 |
over 1 1/2 to 2 1/2 |
0.062 |
over 2 1/2 to 4 |
0.075 |
over 4 to 6 |
0.087 |
over 4 to 8 |
0.100 |
Convexity & Concavity(Mechanical & Structural Sizes)
Largest Nominal O.D., Inches |
Tolerance ± Inches |
2 1/2 and under |
± 0.010 |
over 2 1/2 to 4 |
± 0.015 |
over 4 to 8 |
± 0.025 |
Structural Tubing A 500 Requirements
Grades |
Chemical |
Physical |
C Max. % |
Mn Max. % |
P Max. % |
S Max. % |
Cu Max. % |
Tensile strength, min. psi |
Yield strength, min. psi |
Elongation in 2 in. |
B |
0.26 |
/ |
0.04 |
0.05 |
0.20 |
58,000 |
46,000 |
23 |
C |
0.23 |
1.35 |
0.04 |
0.05 |
0.20 |
62,000 |
50,000 |
21 |
Painting & Coating
Bare, Black Painting, Lightly Oiled
Packing & Loading
Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips