400×300×18 mm S235JRH Steel Rectangular Hollow Section
400x300x18mm Steel rectangular hollow section in S235JRH, S275J0H, S355J2H to EN 10219, with a primer-coated surface optimised for paint adhesion. Nominal weight 176.73 kg/m.
Minimum order
Minimum 10 t per size. If the size is already in the current production cycle, we can accept orders from 5 t. Standard length 6 m; 4–12 m on request. We confirm the minimum, lead time and grade in your quote.
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Minimum order: 10 t per size (from 5 t if the size is in production)
Applications & Usage
This extra heavy-duty industrial Steel rectangular hollow section is commonly specified for heavy structural supports, load-bearing frames, and demanding industrial applications. The 18mm wall thickness provides exceptional structural integrity while maintaining workability. The applied finish enhances both durability and appearance. Available in standard lengths of 6m, this profile can be easily cut, drilled, and welded to suit your specific requirements.
Technical Specifications
| Specification | Value |
|---|---|
| Dimensions | 400mm × 300mm × 18mm |
| Weight per Meter | 176.73 kg/m |
| Material | Steel |
| Alloy/Grade | S235JRH, S275J0H |
| Standard | EN 10219 |
| Finish | Primer Coated |
| Standard Length | 6m |
| Minimum Order per Size | 10 t |
| Cut-to-Length Range | 4000 – 12000 mm |
Section Properties
Nominal values calculated from nominal dimensions to EN 10219-2.
| Property | Value |
|---|---|
| Cross-sectional area(A) | 225 cm² |
| Second moment of area(Ix) | 48402 cm⁴ |
| Second moment of area(Iy) | 31114 cm⁴ |
| Radius of gyration(ix) | 14.7 cm |
| Radius of gyration(iy) | 11.8 cm |
| Elastic section modulus(Wel,x) | 2420 cm³ |
| Elastic section modulus(Wel,y) | 2074 cm³ |
| Plastic section modulus(Wpl,x) | 2978 cm³ |
| Plastic section modulus(Wpl,y) | 2450 cm³ |
| Torsional inertia constant(It) | 64907 cm⁴ |
| Torsional modulus constant(Ct) | 3462 cm³ |
| Surface area per metre(As) | 1.31 m²/m |
| Length per tonne | 5.66 m |
Grade strength and capacity
Minimum strength of each grade this size is rolled in, with the indicative capacity of the section.
| Grade | Min. yield | Tensile | Bending Wel·fy | Axial A·fy |
|---|---|---|---|---|
| S235JRH | 225 MPa | 360–510 MPa | 545 kNm | 5066 kN |
| S275J0H | 265 MPa | 410–560 MPa | 641 kNm | 5966 kN |
Ordered in S355J2H, the S235JRH bending capacity of this size is reached with a 12 mm wall in the same outer size (123 kg/m, 31% lighter).
Indicative values from nominal dimensions: Wel × fy and A × fy, without buckling, cross-section class or partial safety factors. Not a design check.
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