BS EN 10210 for Hot Finished Structural Hollow Sections

BS EN 10210 for Hot finished structural hollow sections of non-alloy and fine grain steels.

This part of this European Standard specifies technical delivery conditions for hot finished hollow sections of circular, square, rectangular or elliptical forms and applies to hollow sections formed hot, with or without subsequent heat treatment, or formed cold with subsequent heat treatment to obtain equivalent metallurgical conditions to those obtained in the hot formed product. 

Chemical Composition for Hot Finished Circular Hollow Section
Chemical composition – ladle analysis
	Hot Finished Circular Hollow Section
Specification	EN10210 S355J2H Part 1: 2006
	% max
Carbon	0.22
Silicon	0.55
Manganese	1.60
Sulphur	0.030
Phosphorus	0.030
Carbon equivalent (CEV) mat T≤16mm	0.45
Type of deoxidation	Fully killed steel

Mechanical Properties for Hot Finished Circular Hollow Section
Specification	EN10210 S355J2H Part 1: 2006
Tensile Strength Rm N/mm2: 3 ≤ T ≤ 100mm	470 – 630
Yield Strength ReH Min, N/mm2: T ≤ 16mm	355
Min Elongation % T ≤ 40mm on gauge length 5.65. √S0	22
Impact properties Minimum Ave energy (J) at -20°C	27

Dimensional tolerances EN10210: 2006 Part 2
	Square/Rectangular	Circular/Ovals
Outside dimension (D B and H)	±1% with a min of ±0.5mm	Circular ±1% with a min of ±0.5mm and maximum of ±10mm
Thickness (T)	-10% Note. Positive deviation limited by mass tolerance	-10% Note. Positive deviation limited by mass tolerance
Squareness of side	90 degrees ±1 degree	–
External corner profile	2T max at each corner* (EN10210 has 3T max).	–
Concavity/convexity (x)	±1% of the side, measured independently of the tolerance on the outside dimension	–
Twist (V)	2mm plus 0.5mm/m max. Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken.	–
Mass (M)	±6% on individual lengths	±6% on individual lengths
Straightness	Max 0.2% of total length & 3mm over every 1m length	Maximum 0.2% of the total length & 3mm over every 1m length. (The permitted tolerance is twice the value for H<250)
Length	+150mm/-0mm	+150mm/-0mm

* Excludes RHS 250 x 200, which is 3T max at each corner in line with EN10210

EN10210 CHS-Circular hollow sections – length and tolerances
Outside Diameter	Welded
mm	Thickness mm	Standard mill lengths m	Special mill lengths m*	Tolerance mm
21.3 – 42.4	All	6.0, 6.4, 7.5	5.4 – 7.5	+150-0
48.3	All	6.0, 6.4, 7.5 & 10.0	5.4 – 14.6	+150-0
60.3 – 114.3	All	6.0, 6.4, 7.5 & 10.0	5.0 – 14.6	+150-0
139.7	All	7.5 & 10.0	6.0 – 14.5	+150-0
168.3 – 193.7	All	7.5, 10.0 & 12.0	6.0 – 14.6	+150-0
219.1 – 508.0	All	10.0 & 12.0	6.0 – 14.6	+150-0