Structural Tube Information

Manufacturing Standards
Orrcon Steel products are manufactured by Cold Forming and Electric Resistance Welding (ERW) and are tested to meet the following Australian Standards:

Structural

Hollow sections to be used for structural purposes are manufactured to meet:

AS/NZS 1163 - Structural Steel Hollow Sections (Grades C250, C350 , C250L0 & C350L0).

Welding Location (Non-Circular Tube)

Where weldline location is specified, appropriate gauging shall be determined by agreement.

Internal Fitments

Where internal fitments are specified appropriate gauging shall be determined by agreement.

Standard Mechanical Properties - Structural Tube & Pipe

*L0 designation indicates guaranteed impact strength properties at 0°C.

Standard Tolerances - Structural Tube & Pipe

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Standard	Grade*	Yield Strength MPa (min)	Tensile Strength MPa (min)	CHS			RHS & SHS
Standard	Grade*	Yield Strength MPa (min)	Tensile Strength MPa (min)	<15	15-30	>30	<15	15-30	>30
AS1163	C250/C250L0	250	320	18	20	22	14	16	18
	C350/C350L0	350	430	16	18	20	12	14	16
	C450/C450L0	450	500	12	14	16	10	12	14

AS1163		Dimensional Tolerances
Characteristic		Pipe (CHS)	Rectangular & Square (RHS / SHS)
External dimensions (d, b, d0)		±1% with minimum of ±0.5mm & maximum ±10%	±1% with minimum of ±0.5mm
Thickness (t)	d≤406.4mm	±10%	±10%
Thickness (t)	d>406.4mm	±10% with max of ±2mm	±10%
		All Sections
Mass		Not less than 96% of specified nominal mass

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AS1163		Shape Tolerances
Characteristic		All Sections
Corner Radius	≤50x50mm equivalent perimeter	1.5t to 3t
Corner Radius	>50x50mm equivalent perimeter	1.8t to 3t
Twist (v)		≤2mm ±0.5mm/m length
Concavity / Convexity		Max 0.8% or 0.5mm, whichever is greater
Squareness		90 ± 1°
		Pipe (CHS)	Rectangle & Square (RHS/SHS)
Straightness		0.20% of total length	0.15% of total length

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Structural Tube Information