EN 10219 S235JRH circular hollow sections (CHS) are available in multiple outside-diameter and nominal-wall combinations. In commercial inquiries, walls such as 3, 4, 5, 6, 8, 10 and 12.5 mm are useful starting points, but they are not a universal stock list or a wall-thickness range guaranteed by EN 10219. Actual availability depends on outside diameter, manufacturing capability, length and order quantity.
S235JRH Grade and Standard
S235JRH is a structural hollow-section steel designation under EN 10219-1. S235JR is a related designation associated with EN 10025-2 steel products, but it should not replace S235JRH on an EN 10219 hollow-section order or inspection document. The H suffix is part of the hollow-section designation.
EN 10219-1 defines technical delivery conditions for cold-formed welded structural hollow sections. EN 10219-2 covers dimensional tolerances, dimensions and sectional properties. The correct product specification should identify both parts, their applicable editions and the grade.
Common Wall Thickness Options
| Nominal wall (mm) | Equivalent (in, approximate) | Procurement note |
| 3.0 | 0.118 | Confirm diameter and application |
| 4.0 | 0.157 | Confirm diameter and application |
| 5.0 | 0.197 | Confirm diameter and application |
| 6.0 | 0.236 | Confirm diameter and application |
| 8.0 | 0.315 | Confirm diameter and application |
| 10.0 | 0.394 | Confirm diameter and application |
| 12.5 | 0.492 | Confirm diameter and application |
This table illustrates frequently discussed nominal wall values, not an EN 10219 stock guarantee or engineering recommendation. A 4 mm wall on a small CHS and a 4 mm wall on a large CHS behave differently because their diameter-to-thickness ratios differ. Confirm each diameter-and-wall pairing with the relevant dimensional table, structural design and mill availability.
Diameter and Wall Selection
A thicker wall generally increases cross-sectional area, mass and resistance to certain local instability modes, but suitability depends on loading, unsupported length, connection details and the governing design code. Large-diameter sections may require a different wall than small sections under otherwise similar loads. Neither a generic thickness band nor an application label replaces structural calculations.
Dimensions and Tolerances
EN 10219-2 specifies tolerances for outside dimensions, wall thickness, out-of-roundness, straightness, length and mass, subject to the standard’s definitions and applicable conditions. Do not interpret a simplified ± percentage as valid for all CHS diameters and wall thicknesses. For acceptance, use the actual tolerance table in the edition stated in the purchase order and request measured dimensional records where necessary.
A complete purchase description includes EN 10219-1 and EN 10219-2, S235JRH, outside diameter, nominal wall thickness, length, quantity, surface condition and the required inspection document. For example: “Circular hollow section, EN 10219 S235JRH, 168.3 × 6.0 mm, 12 m, subject to confirmed availability and specified inspection requirements.”
Weight and Structural Performance
For nominal CHS dimensions in millimeters and assumed carbon steel density of 7,850 kg/m³, the theoretical mass per meter is W = 0.02466 × t × (D − t) kg/m. A 168.3 × 6.0 mm section has a theoretical mass of approximately 24.02 kg/m, or 288.2 kg for a 12 m length. Theoretical values exclude coating and packing mass.
| OD (mm) | Wall (mm) | Nominal ID (mm) | Approx. kg/m |
| 60.3 | 3.2 | 53.9 | 4.51 |
| 114.3 | 4 | 106.3 | 10.88 |
| 168.3 | 6 | 156.3 | 24.02 |
| 219.1 | 8 | 203.1 | 41.65 |
| 508 | 10 | 488 | 122.81 |
Increasing wall thickness raises nominal steel mass, but it does not change the specified material grade. S235JRH mechanical-property requirements depend on the applicable product-standard edition and thickness range. For structural design, verify yield strength, tensile strength, toughness and any relevant buckling checks using the governing standard rather than extrapolating one thickness-band value to all products.
Selecting and Ordering S235JRH
Choose the section from project loads, member length, stability requirements and environmental conditions. Then compare suitable diameter-and-wall combinations against the applicable structural design code. Coating, end preparation, welding and transport requirements can affect procurement and fabrication, even when the nominal steel dimensions remain unchanged.
For quotation, specify the full grade and standard, diameter, wall, length, quantity, surface treatment, inspection document type and destination. EN 10204 type 3.1 is an inspection-document designation, not a stand-alone product certification. Verify actual manufacturing availability and any requested third-party inspection before order confirmation.
LONGMA manufactures ERW and LSAW round steel pipe at a 230,000 m² facility, with annual output exceeding 500,000 tonnes. Submit the required S235JRH CHS dimensions and quantity to info@ilongma.com to confirm product scope, delivery conditions and quotation.
FAQ
Is S235JR the same as S235JRH?
No. For EN 10219 structural hollow sections, use the formal S235JRH grade designation and verify the relevant EN 10219 product requirements.
What is the most common S235JRH wall thickness?
There is no single universally applicable wall. Values such as 3–6 mm are common inquiry starting points, but the appropriate and available wall depends on diameter, structural design and supplier confirmation.
How is CHS weight calculated?
Use W = 0.02466 × t × (D − t) kg/m, where outside diameter D and nominal wall t are both measured in millimeters and steel density is assumed to be 7,850 kg/m³.
Does a thicker wall always make a better section?
No. It adds material and can improve certain resistance measures, but member design also depends on buckling, stiffness, connections, cost and the applicable structural code.
References: EN 10219-1, Cold Formed Welded Structural Hollow Sections—Technical Delivery Conditions; EN 10219-2, Tolerances, Dimensions and Sectional Properties; EN 10025-2, Technical Delivery Conditions for Non-Alloy Structural Steels; EN 10204, Types of Inspection Documents. Apply the contractually specified editions.
