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AS1074 Standard Specification for Cold-formed structural steel hollow sections. This Standard specifies requirements for the production and supply of cold-formed,electric resistance-welded, steel hollow sections used for structural purposes.
Chemical Composition
|
Grades |
Chemical composition % max |
||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Al |
Ti |
|
|
C250, |
0.12 |
0.05 |
0.50 |
0.03 |
0.03 |
0.15 |
0.10 |
0.10 |
0.04 |
|
C350, |
0.20 |
0.25 |
1.60 |
0.03 |
0.03 |
0.30 |
0.10 |
0.10 |
0.04 |
|
C450, |
0.20 |
0.25 |
1.70 |
0.03 |
0.03 |
0.30 |
0.35 |
0.10 |
0.04 |
Mechanical Properties
|
Grade |
Minimum |
Minimum |
Minimum elongation |
|||||
|
Mpa |
Mpa |
Circular hollow sections |
Rectangular hollow sections |
|||||
|
≤15 |
＞15 ≤30 |
＞30 |
≤15 |
＞15 ≤30 |
＞30 |
|||
|
C250, |
250 |
320 |
18 |
20 |
22 |
14 |
16 |
18 |
|
C350, |
350 |
430 |
16 |
18 |
20 |
12 |
14 |
16 |
|
C450, |
450 |
500 |
12 |
14 |
16 |
10 |
12 |
14 |
