AS/NZS 1163 specifies the requirements for cold-formed, electric resistance-welded, carbon steel hollow sections used for structural purposes. It considers three strength grades, with or without impact properties, that are suitable for welding.
It is applicable to structural hollow sections formed cold without subsequent heat treatment. The standard does not cover submerged arc-welded, helical welded or U’ed and O’ed steel hollow sections. Here apply this standard in the ERW pipes production.
CHEMICAL COMPOSITION
|
Grades
|
Chemical composition( cast or product analysis) %max.
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Al
|
Ti
|
Micro-alloying elements
|
CE
|
|
C250,
C250L0
|
0.12
|
0.05
|
0.50
|
0.03
|
0.03
|
0.15
|
0.10
|
0.10
|
0.04
|
0.03
|
0.25
|
|
C350,
C350L0
|
0.20
|
0.45
|
1.60
|
0.03
|
0.03
|
0.15
|
0.10
|
0.10
|
0.04
|
0.03
|
0.43
|
1, Sizes: OD21.3mm –OD660mm;
2, Wall thickness: WT1.8mm – WT 22.2mm
3, Steel Grade: C250, C350
4, Pipe Length: SRL, DRL. Or other fixed length max. to 12.5meters without girth welding.
5, Pipe Ends: beveled ends, plain ends.
6, Zinc Coating: hot-dip galvanized coating applicable in acc. to AS/NZS 4680, AS 4750 or AS/NZS 4792 as appropriate.
