ASTM A500/A500M Hollow Section
A500/A500M specification covers cold-formed welded and seamless carbon steel round, square, rectangular, or special structural tubular shapes for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.This tubing is produced in both welded and seamless sizes with a periphery of 88 inch(2235 mm)or less, and a specified wall thickness of 1.000 inch(25.4 mm)or less. Grade D requires heat treatment.
ASTM A500 standard steel pipe has four steel grade products, respectively ASTM A500 grade A/B/C/D. Grade D offers the highest strength, while Grade A is the most economical for lowstress applications. Grade B balances strength and ductility, making it the most widely used in construction.
Sizes Of ASTM A500 hollow section
ASTM A500 GR.A / B / C Cold Formed Hollow Section pipe |
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| Square Pipes | Rectangular Pipes | ||
| Size(mm) | Thickness(mm) | Size(mm) | Thickness(mm) |
| 10x10 | 0.6-1.0 | 20x10 | 0.6-1.0 |
| 12×12 | 0.6-1.0 | 25x12 | 0.6-1.0 |
| 16x16 | 0.6-1.2 | 38x19 | 0.6-1.5 |
| 19x19 | 0.6-1.5 | 50x25 | 0.6-1.5 |
| 20×20 | 0.6-1.5 | 50x30 | 1.0-3.0 |
| 25x25 | 1.0-2.75 | 60x40 | 1.5-3.5 |
| 30x30 | 1.0-2.75 | 75x50 | 1.5-4.0 |
| 32×32 | 1.0 -3.0 | 80x40 | 1.5-4.0 |
| 38x38 | 1.0 -3.0 | 100x50 | 2.0-6.0 |
| 40x40 | 1.0 -3.5 | 100x60 | 2.0-6.0 |
| 50×50 | 1.0 -5.0 | 100x75 | 2.0-6.0 |
| 60x60 | 1.0-6.0 | 120×60 | 3.0-6.0 |
| 63.5x63.5 | 1.0 -6.0 | 120x80 | 3.0 -6.0 |
| 70×70 | 1.5-6.0 | 125x50 | 3.0-6.0 |
| 75x75 | 1.5-6.0 | 125x75 | 3.0-6.0 |
| 80x80 | 2.0-6.0 | 150x50 | 3.0 -6.0 |
| 90 x90 | 2.0 -6.0 | 150x75 | 3.0 -6.0 |
| 100x100 | 2.3-6.0 | 150x100 | 4.0 -12 |
| 120 x120 | 4.0-6.0 | 160x80 | 4.0-6.0 |
| 125x125 | 4.0-6.0 | 175x100 | 4.0-12 |
| 150x150 | 4.0 -8.0 | 200x100 | 4.0 -12 |
| 200x200 | 6.0-12 | 200x150 | 4.0 -12 |
| 250 x250 | 6.0-12 | 250x150 | 5.0-12 |
| 300x300 | 6.0-12 | 300x200 | 5.0 -12 |
| 350x350 | 6.0 -12 | 350x250 | 5.0 -12 |
| 400x400 | 6.0-12 | 400x200 | 5.0 -12 |
| 500x500 | 6.0-16 | 500x300 | 5.0-16 |
ASTM A500 Round Pipes |
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| DN | Nominal Size | Outside Diameter | Wall Thickness | ||
| inch | mm | inch | mm | ||
| 15 | 1/2" | 0.84 | 21.3 | 0.109 | 2.77 |
| 20 | 3/4" | 1.05 | 26.7 | 0.113 | 2.87 |
| 25 | 1" | 1.315 | 33.4 | 0.104 | 2.64 |
| 32 | 1 1/4" | 1.66 | 42.2 | 0.11 | 2.79 |
| 1.66 | 42.2 | 0.14 | 3.56 | ||
| 1.66 | 42.2 | 0.191 | 4.85 | ||
| 40 | 1 1/2" | 1.9 | 48.3 | 0.114 | 2.9 |
| 1.9 | 48.3 | 0.145 | 3.68 | ||
| 1.9 | 48.3 | 0.2 | 5.08 | ||
| 50 | 2" | 2.375 | 60.3 | 0.121 | 3.07 |
| 2.375 | 60.3 | 0.154 | 3.91 | ||
| 2.375 | 60.3 | 0.218 | 5.54 | ||
| 65 | 2 1/2" | 2.875 | 73 | 0.156 | 3.96 |
| 2.875 | 73 | 0.188 | 4.78 | ||
| 2.875 | 73 | 0.203 | 5.16 | ||
| 2.875 | 73 | 0.276 | 7.01 | ||
| 80 | 3" | 3.5 | 88.9 | 0.156 | 3.96 |
| 3.5 | 88.9 | 0.188 | 4.78 | ||
| 3.5 | 88.9 | 0.226 | 5.49 | ||
| 90 | 3 1/2" | 4 | 101.6 | 0.156 | 3.96 |
| 4 | 101.6 | 0.188 | 4.78 | ||
| 4 | 101.6 | 0.226 | 5.74 | ||
| 100 | 4" | 4.5 | 114.3 | 0.156 | 3.96 |
| 4.5 | 114.3 | 0.188 | 4.78 | ||
| 4.5 | 114.3 | 0.219 | 5.56 | ||
| 4.5 | 114.3 | 0.237 | 6.02 | ||
| 4.5 | 114.3 | 0.337 | 8.56 | ||
| 125 | 5" | 5.563 | 141.3 | 0.258 | 6.55 |
| 5.563 | 141.3 | 0.375 | 9.53 | ||
| 150 | 6" | 6.625 | 168.3 | 0.28 | 7.11 |
| 200 | 8" | 8.625 | 219.1 | 0.322 | 8.18 |
| 8.625 | 219.1 | 0.5 | 12.7 | ||
| 250 | 10" | 10.75 | 273 | 0.365 | 9.27 |
| 10.75 | 273 | 0.5 | 12.7 | ||
| 300 | 12" | 12.75 | 323.8 | 0.375 | 9.52 |
| 12.75 | 323.8 | 0.5 | 12.7 | ||
| 350 | 14" | 14 | 355.6 | 0.375 | 9.52 |
| 14 | 355.6 | 0.5 | 12.7 | ||
| 400 | 16" | 16 | 406.4 | 0.375 | 9.52 |
| 16 | 406.4 | 0.5 | 12.7 | ||
| 450 | 18" | 18 | 457 | 0.375 | 9.52 |
| 18 | 457 | 0.5 | 12.7 | ||
| 500 | 20" | 20 | 508 | 0.375 | 9.52 |
| 20 | 508 | 0.5 | 12.7 | ||
| 600 | 24" | 24 | 609.6 | 0.375 | 9.52 |
| 24 | 609.6 | 0.5 | 12.7 | ||
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Chemical Requirements Of ASTM A500 hollow section
| Element | Composition,% | |||
| Grades B and D | Grade C | |||
| Heat Analysis |
Product Analysis |
Heat Analysis |
Product Analysis |
|
| Carbon, maxA | 0.26 | 0.3 | 0.23 | 0.27 |
| Manganese, maxA | 1.35 | 1.4 | 1.35 | 1.4 |
| Phosphorus, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Sulfur, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Copper, minB | 0.2 | 0.18 | 0.2 | 0.18 |
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Tensile Requirements Of ASTM A500 hollow section
| Round, Square, Rectangular, and Special Tubular Shapes | |||
| Grade B | Grade C | Grade D | |
| Tensile strength,min, psi [MPa] |
58 000 | 62 000 | 58 000 |
| [400] | [425] | [400] | |
| Yield strength, min, psi [MPa] | 46 000 | 50 000 | 36 000 |
| [315] | [345] | [250] | |
| Elongation in 2 in.[50 mm], min, %C |
23A | 21B | 23A |
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ASTM A500 tructural Tubing Permissible Variations in Dimensions
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Outside Dimensions:
Round Structural Tubing-The outside diameter shall not vary more than 60.5 %, rounded to the nearest 0.005 in.(0.1mm), from the specified outside diameter for specified outside diameters 1.900 in. (48mm) and smaller, and ±0.75 %, rounded to the nearest 0.005 in.(0.1mm) , from the specified outside diameter for specified outside diameters 2.00 in.(5cm) and larger. The outside diameter measurements shall be made at positions at least 2 in. (5cm) from the ends of the tubing.
Square and Rectangular Structural Tubing-The outside dimensions, measured across the flats at positions at least 2 in. (5cm) from the ends of the tubing, shall not vary from the specified outside dimensions by more than the applicable amount given in the table below, which includes an allowance for convexity or concavity.
| Permissible Variations in Outside Flat Dimensions for Square and Rectangular Structural Tubing | |
| Specified Outside Large Flat Dimension, in. [mm] |
Permissible Variations Over and Under Specified Outside Flat Dimensions,A in. [mm] |
| 2 1/2 [65] or under | 0.020 [0.5] |
| Over 2 1/2 to 3 1/2 [65 to 90], incl | 0.025 [0.6] |
| Over 3 1/2 to 5 1/2 [90 to 140], incl | 0.030 [0.8] |
| Over 5 1/2 [140] | 0.01 times large flat dimension |
| A The permissible variations include allowances for convexity and concavity. For rectangular tubing having a ratio of outside large to small flat dimension less than 1.5, and for square tubing, the permissible variations in small flat dimension shall be identical to the permissible variations in large flat dimension. For rectangular tubing having a ratio of outside large to small flat dimension in the range of 1.5 to 3.0 inclusive, the permissible variations in small flat dimension shall be 1.5 times the permissible variations in large flat dimension. For rectangular tubing having a ratio of outside large to small flat dimension greater than 3.0, the permissible variations in small flat dimension shall be 2.0 times the permissible variations in large flat dimension. | |
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Wall Thickness
The minimum wall thickness excluding the weld seam of welded tubing if supplied with the inside flash not being removed shall be not more than 10 % less than the specified wall thickness. If the welded tubing is supplied with the inside flash removed, then the weld seam shall be included in the wall thickness measurement and shall be notmore than 10 % less than the specified wall thickness. The maximum wall thickness, excluding the weld seam of welded tubing, shall be not more than 10 % greater than the specified wall thickness. For square and rectangular tubing, the wall thickness requirements shall apply only to the centers of the flats.
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Length
Structural tubing is normally produced in random lengths 5 ft [1.5 m] and over, in multiple lengths, and in specific lengths. Refer to Section 4. When specific lengths are ordered, the length tolerance shall be in accordance with the table below
| Length Tolerances for Specific Lengths of Structural Tubing | ||||
| 22 ft [6.5 m] and Under |
Over 22 ft [6.5 m] |
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| Over | Under | Over | Under | |
| Length tolerance for specific lengths, in. [mm] | 1/2 [13] |
1/4 [6] |
3/4 [19] |
1/4 [6] |
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Straightness
The permissible variation for straightness of structural tubing shall be 1⁄8 in. times the number of feet (10 mm times the number of metres) of total length divided by 5.
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Squareness of Sides
For square and rectangular structural tubing, adjacent sides shall be square (90°), with a permissible variation of 62° max.
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Radius of Corners
For square and rectangular structural tubing, the radius of each outside corner of the section shall not exceed three times the specified wall thickness.
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Twist
For square and rectangular structural tubing,the permissible variations in twist shall be as given in the table below.Twist shall be determined by holding one end of the tubing down on a flat surface plate, measuring the height that each corner on the bottom side of the tubing extends above the surface plate near the opposite ends of the tubing, and calculating the twist (the difference in heights of such corners), except that for heavier sections it shall be permissible to use a suitable measuring device to determine twist. Twist measurements shall not be taken within 2 in. (5 cm) of the ends of the tubing.
| Permissible Variations in Twist for Square and Rectangular Structural Tubing | ||
| Specified Outside Large Flat Dimension, in. [mm] |
Maximum Permissible Variations in Twist per 3 ft of Length (Twist per Metre of Length) |
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| in. | [mm] | |
| 11/2 [40] and under | 0.05 | [1.3] |
| Over 11/2 to 21/2 [40 to 65], incl | 0.062 | [1.6] |
| Over 21/2 to 4 [65 to 100], incl | 0.075 | [1.9] |
| Over 4 to 6 [100 to 150], incl | 0.087 | [2.2] |
| Over 6 to 8 [150 to 200], incl | 0.1 | [2.5] |
| Over 8 [200] | 0.112 | [2.8] |
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