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AS1163 Australia Standard for Cold-formed Structural Steel Hollow Sections
Grade: C250, C350
Chemical composition comparison C250 with C350：
| Grade |
Chemical composition % (max) |
||||||||
| C | Si | Mn | P | S | Mo | Al | Ti |
Micro-alloying elements |
|
| C250 | 0.12 | 0.05 | 0.50 | 0.040 | 0.030 | 0.10 | 0.10 | 0.04 | 0.030 |
| C350 | 0.20 | 0.25 | 1.60 | 0.040 | 0.030 | 0.10 | 0.10 | _ | 0.15 |