Hot Finished Hollow Sections are supplied in accordance with the Euronorm EN 10210. The same steel grade i.e. S355 J2H can be supplied against different Euronorms so it is important that the full EN number and the steel grade is stated when specifying or ordering. i.e. EN 10210 S355 J2H
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Chemical Composition of the steel (ladle analysis)
Steel Grade S355 J2H (up to 40mm thick) |
Mechanical Composition of the steel
Steel Grade S355 J2H |
Carbon 0.22 % max
Silicon 0.55 % max
Manganese 1.60 % max |
Sulphur 0.035 % max
Phosphorous 0.035 % max
Carbon equivalent 0.45 % max |
Tensile Strength
Yield Strength
Minimum Elongation
Impact properties |
490 – 630 N/mm2
355 N/mm2
22 %
27 Joules |
: 3 ≤ T ≤ 65 mm
: 3 ≤ T ≤ 16 mm
: T≤ 40mm on guage length 5.65 √ S0
:Minimum average energy 10 x 10mm specimen at – 20 degrees centigrade |
| Dimensional Tolerances - Square & Rectangular |
Outside dimensions B and H
+/- 1% with a minimum of +/- 0.5mm |
Twist
2mm plus 0.5mm per metre max. |
Thickness (t)
Welded – 10% (positive deviation limited by mass tolerance)
Seamless – 10 % (positive deviation limited by mass tolerance)
For seamless sections, thicknesses of less than 10% but not less than 12.5% of the nominal thickness may occur in smooth transition areas over not more than 25 % of the circumference |
Concavity/convexity
1% - independent of the outside
dimension tolerance |
Mass
Welded - +/- 6% on individual lengths
Seamless - + 8% - 6% on individual lengths |
External corner profile
3t maximum at each corner |
Straightness
Maximum 0.2 % of the total length |
Squareness of sides
90 degrees +/- 1° |
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| Dimensional Tolerances - Eliptical |
Outside dimensions B and H
UTI 220 x 110 +/- 2%, Over 220 x 110 +/- 1% |
Thickness (t)
- 10% (positive deviation limited by mass tolerance) |
Twist
2mm plus 0.5mm per metre max. Section placed on flat surface with deviation between major axes measured at one end% |
Mass
+/- 6% on individual lengths |
Straightness
Maximum 0.2% of the total length |
| Dimensional Tolerances - Circular |
Outside dimension D
+/- 1% with a minimum of +/- 0.5 mm and a max of +/- 10mm. Positive deviation limited by mass tolerance |
Mass
+/- 6 % on individual lengths |
Straightness
Maximum 0.2 % of the total length |
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