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ASTM A500 tube is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square and rectangular shapes. ASTM A500 is a standard specification published by the ASTM for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It is commonly specified in the USA for hollow structural sections, but the more stringent CSA G40.21 is preferred in Canada. Another related standard is ASTM A501, which is a hot-formed version of this A500.
CHEMICAL PROPERTIES of ASTM A500
| Grade B | Grade C | |
| Carbon, Max % | 0.260 | 0.230 |
| Manganese, Max % | —- | 1.350 |
| Phosphorus, Max % | 0.035 | 0.035 |
| Sulphur, Max % | 0.035 | 0.035 |
| Copper, when copper steel is specified, Min % |
SIZES of ASTM A500
| Rectangle | Type: HREW | Widths: Rectangles equivalent to 2” sq through 20” |
| Round | Type: HREW |
|
| Square | Type: HREW |
|
*Typically CREW is available in 065 GA and lighter and OD sizes 2” and under
Outside Dimensions
|
Largest Outside Dimension
|
Tolerance*
|
|
2-1/2” and under
|
±0.020”
|
|
Over 2-1/2” to 3-1/2” inclusive
|
±0.025”
|
|
Over 3-1/2” to 5-1/2” inclusive
|
±0.030”
|
|
Over 5-1/2”
|
±1%
|
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