EN 10219 standard details

EN 10219 is a European standard that specifies the technical delivery conditions for cold-formed welded structural hollow sections made from non-alloy and fine-grained steels. This standard outlines mechanical properties, dimensional tolerances, and other essential requirements to ensure the quality and performance of these steel sections in various construction and engineering applications. The following table provides key mechanical properties of different steel grades used in EN 10219:

Material	Thickness in mm				Min. Elongation (%)
	t<16	16>t<40	t<3	3>t<40	t<40
S235JRH	235	225	360-510	340-470	24
S275J0H	275	265	430-580	410-560	20
S275J2H	275	265	430-580	410-560	20
S355J0H	355	345	510-680	490-630	20
S355J2H	355	345	510-680	490-630	20

In addition to mechanical properties, EN 10219 also defines manufacturing tolerances to ensure consistency and reliability in production. These tolerances vary depending on the type of hollow section (round, square, or rectangular) and are crucial for proper fit and function in construction projects. Here are the typical manufacturing tolerances under EN 10219:

Characteristic	Round Hollow Sections	Square and Rectangular Hollow Sections
Outside DimensionÂ	± 1% with min ± 0.5mm and max ± 10mm	± 1% with min of ± 0.5mm
Thickness (T)Â	T≤5mm: ±10%	T≤5mm: ±10%
	T>5mm: ± 0.5mm	T>5mm: ± 0.5mm
Out-of-RoundnessÂ	2%	-
Convexity	-	Max .8% with min 0.5mm
Squareness of side	-	90° ± 1°
External Corner ProfileÂ	-	T≤6mm: 1.6T to 2.4T
	-	6<T≤10mm: 2.0T to 3.0T
	-	T,10: 2.4T to 3.6T
Twist	-	2mm plus 0.5mm/m
Straightness	0.2% of totalÂ	0.15% of total
Mass	±6% on individual length

Understanding these standards is essential for engineers, architects, and manufacturers to select the right materials and ensure compliance with international construction codes and safety regulations.

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