Section Geometry of HEA 200
HEA 200 is a narrow-flange H section in the European series. Under the dimensional standard EN 10365 the section designation describes the nominal size in the HEA range, and the actual dimensions are height 190 mm, flange width 200 mm, web thickness 6.5 mm, flange thickness 10 mm and root radius 18 mm. The mass is 42.3 kg per metre. Buyers sometimes write the size as 200 x 190 x 6.5 x 10, which lists the nominal range value first and the resulting height second; the dimensional figures should always be taken from EN 10365 rather than from the shorthand in a title.
| Parameter | HEA 200 |
|---|---|
| Height h | 190 mm |
| Flange width b | 200 mm |
| Web thickness tw | 6.5 mm |
| Flange thickness tf | 10 mm |
| Root radius r | 18 mm |
| Mass | 42.3 kg/m |
| Dimensional standard | EN 10365 |
S275JR and S355J2 Steel Grades
The two grades named in the enquiry are defined in EN 10025-2. S275JR has a minimum yield strength of 275 MPa for thickness up to 16 mm and a tensile range of 410-560 MPa, with JR indicating a Charpy impact test at 20 degrees C. S355J2 has a minimum yield strength of 355 MPa for the same thickness and a tensile range of 470-630 MPa, with J2 indicating a Charpy impact test at minus 20 degrees C.
| Property | S275JR | S355J2 |
|---|---|---|
| Carbon, max. | 0.21% | 0.20% |
| Manganese, max. | 1.50% | 1.60% |
| Silicon, max. | 0.55% | 0.55% |
| Phosphorus, max. | 0.045% | 0.025% |
| Sulphur, max. | 0.045% | 0.025% |
| Yield strength, up to 16 mm | min. 275 MPa | min. 355 MPa |
| Tensile strength | 410-560 MPa | 470-630 MPa |
| Impact test | 27 J at 20 degrees C | 27 J at minus 20 degrees C |
Both grades are structural steels with a maximum carbon content low enough for routine welding. The tighter phosphorus and sulphur limits of S355J2, together with its lower impact test temperature, make it the normal choice for dynamically loaded or cold-climate members, while S275JR is adequate for general building frames and support structures.
Ordering and Dimensional Control
An order for an HEA 200 beam should state the section designation, the steel grade with its impact suffix, the delivery length and the tolerances that apply. EN 10034 and EN 10365 give the permissible deviations for shape and mass, and the mass tolerance is normally expressed as a percentage of the theoretical value, so a delivered beam is compared against the 42.3 kg per metre figure.
Straightness, squareness of the flange and the condition of the rolled surface are checked at delivery. Drill holes and copes prepared before galvanizing should be deburred, and joints to end plates are usually welded with matching filler metal classified for the parent grade.
Frequently Asked Questions
Q: What are the exact dimensions of HEA 200?
A: Height 190 mm, flange width 200 mm, web thickness 6.5 mm, flange thickness 10 mm and root radius 18 mm, per EN 10365.
Q: What is the difference between S275JR and S355J2?
A: Minimum yield strength is 275 MPa and 355 MPa respectively, and the impact test is at 20 degrees C for JR against minus 20 degrees C for J2.
Q: Which standard covers the dimensions of HEA sections?
A: EN 10365, which replaced the earlier EN 10034 for the dimensional and mass tolerances of H sections.
Q: Can the two grades be welded with the same consumables?
A: Both weld with conventional low-hydrogen consumables, but the filler metal should be matched to the higher-strength grade where the two are joined.
Q: What does the mass of HEA 200 allow for in design?
A: The nominal mass is 42.3 kg per metre; the tolerance on delivered mass is applied as a percentage of that theoretical value.