AS1163 Australia Standard for Cold-formed Structural Steel Hollow Sections
C250, C350,C450
Chemical composition comparison C250 with C350:
| C | P | S | Micro-alloying elements | ||||||
| C250 | 0.12 | 0.05 | 0.5 | 0.04 | 0.03 | 0.1 | 0.1 | 0.04 | 0.03 |
| C350 | 0.2 | 0.25 | 1.6 | 0.04 | 0.03 | 0.1 | 0.1 | _ | 0.15 |
The tolerances on dimensions are established in accordance with AS/NZS 1163.
| 1%, with minimum of 0.5mm | |||||
| 10% | |||||
| Max. 0.8% or 0.5mm, whichever is greater | |||||
| 901 | |||||
| (Equivalent to 50x50 or less) | 1.5t to 3.0t | ||||
| (Equivalent to greater than 50x50) | 1.8t to 3.0t | ||||
| 2mm+0.5mm/m in length | |||||
| 0.15% of total length | |||||
| Not less than 0.96 times the specified mass on individual lengths | |||||
| 0, +100mm | |||||
| L6,000mm | 0, +5mm | ||||
| 6,000mmL10,000mm | 0, +15mm | ||||
| 10,000mm L | 0, +5mm+1mm/m | ||||
1)The External dimensions are measured across the flats at positions at least 50mm from the end of the HSS. |
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