450×450×12 mm S235JRH Steel Square Hollow Section
450x450x12mm cold-formed ERW square hollow section to EN 10219, rolled in S235JRH, S275J0H or S355J2H depending on size, supplied with a galvanized coating that protects against corrosion in harsh environments.
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
Equal sides carry load about both axes, so this square hollow section is specified for columns, posts, gates, and frames, and the closed section resists torsion better than an open profile of similar weight. Supplied black, with a red-oxide shop primer, or hot-dip galvanized; the internal weld bead can be removed on request on most sizes.
Technical Specifications
| Specification | Value |
|---|---|
| Dimensions | 450mm × 450mm × 12mm |
| Weight per Meter | 160.187 kg/m |
| Material | Steel |
| Alloy/Grade | S235JRH, S275J0H, S355J2H |
| Standard | EN 10219 |
| Finish | Galvanized |
| 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) | 204 cm² |
| Second moment of area(I) | 64164 cm⁴ |
| Radius of gyration(i) | 17.7 cm |
| Elastic section modulus(Wel) | 2852 cm³ |
| Plastic section modulus(Wpl) | 3315 cm³ |
| Torsional inertia constant(It) | 103150 cm⁴ |
| Torsional modulus constant(Ct) | 4357 cm³ |
| Surface area per metre(As) | 1.74 m²/m |
| Length per tonne | 6.24 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 | 235 MPa | 360–510 MPa | 670 kNm | 4795 kN |
| S275J0H | 275 MPa | 410–560 MPa | 784 kNm | 5612 kN |
| S355J2H | 355 MPa | 470–630 MPa | 1012 kNm | 7244 kN |
Ordered in S355J2H, the S235JRH bending capacity of this size is reached with a 10 mm wall in the same outer size (135 kg/m, 15% lighter).
Indicative values from nominal dimensions: Wel × fy and A × fy, without buckling, cross-section class or partial safety factors. Not a design check.
Nearest inch size to ASTM A500: HSS 18 × 18 × ½ →
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