Hybox^® structural hollow sections

introduction

We manufacture a broad range of tubes to serve the construction, conveyance, pressure, energy, automotive and engineering markets. Because steel hollow sections offer the ideal combination of versatility, stength and efficiency for construction and mechanical applications.

Hybox^®355

fully complies with the European Standard for cold formed structural hollow sections, EN10219 S355 J2H and is used in a wide range of construction and mechanical related applications including wind bracing and machinery.

Overview

Manual

Hybox

Overview

Hybox 355 - Cold formed structural hollow sections

Key features

Excellent quality, made with steel from a high quality production process
Minimum strength of 355 MPa
Properties suitable for low temperature applications (-20°C/-4°F)
Dimensional consistency and corner radius controlled
High levels of formability and, because the steel is fully killed, excellent weldability
Suitable for applications demanding specific properties
Suitable for structural applications and fully compliant with design codes
Batch-tested to give the properties of the specific delivered material; full test certification supplied
Clearly marked as Hybox 355 , with the reassurance of batch traceability
Specific technical support available
Excellent supply availability through approved stockholders
All Hybox 355 material is CE marked and is fully compliant with the Construction Products Directive (CPD)
Suitable for galvanizing

Properties

Manual

Hybox

Properties

Mechanical properties

Hybox 355

Yield strength	R_eH min N/mm²	T≤16mm	355
Tensile strength	Rm min N/mm²	T < 3mm	510-680
		3mm ≤ T ≤ 40mm	470-630
Elongation % min	L₀=5.65√S_o	T ≤ 40mm	20
Impact strength	10mm x 10xx	°C	-20
		J	40
Carbon equivalent	(CEV) max		0.45

Chemical composition

Hybox 355

All values are in weight%

C	Si	Mn	P	S
0.22	0.55	1.60	0.030	0.030

Chemistries with lower C, S, P and Si content are available on request.

Dimensions

Manual

Hybox

Hybox® 355

Dimensional capability

Hybox 355 is available in sizes from 33.7 x 3.0 OD up to and including 508.0 x 16 OD in our circular hollow sections range and from 25 x 25 x 2.0 up to and including 400 x 400 x 12.5 and the equivalent rectangles in our rectangular hollow section range.

Hybox 355 is supplied with an inspection certificate 3.1 to EN 10204. Standard lengths are 7.5 metres and 12.0 metres, with special mill lengths from 6 metres up to 18m available by arrangement.
Further details of specific size and grade combinations can be found in our Hybox downloads section.

Dimensional tolerances

Dimensional tolerances are in accordance with EN10219: Part 2

	Circular	Square/Rectangular
		Side length (mm)	Tolerance
Outside dimension (D B and H)	±1% with a min of ±0.50mm and a max of ±10mm	H,B < 100	±1% with a min of ±0.5mm
		100 ≤ H,B	±0.8%
		H,B > 200	±0.6%
Thickness (T)	For D≤406.4mm	T ≤ 5mm	± 10%
	T ≤ 5mm ±10%	T > 5mm	±0.50mm
	T > 5mm ±0.50mm
	For D > 406.4mm ±10% with a max of ±2mm
Out of roundness (O)	2% for D/T < 100, where D/T ≥ 100 out-of-roundness	-
	tolerance to be agreed
Concavity/Convexity (independent	–	Max 0.8% with a min of 0.5mm
tolerance on outside dimensions)
Squareness of side	–	90º ± 1
External corner profile	–	T ≤ 6.0	1.6T to 2.4T
EN10219: Part 2 Table 3		6.0 < T ≤10.0	2.0T to 3.0T
		T > 10.0	2.4T to 3.6T
Twist (V)	–	2mm plus 0.5mm/m length
Straightness	0.20% of total length and 3mm over any 1m length	0.15% of total length and 3mm over any 1m length
Mass (M) ±6% on individual lengths	±6% on individual lengths	±6% on individual lengths
Length -0 +50mm	-0 +50mm	-0 +50mm