120×80×8 mm S420MC High-Strength Rectangular Hollow Section
120x80x8mm Steel high-strength rectangular tube in S420MC, S500MC, S600MC, S700MC to EN 10219 / EN 10149-2, with an uncoated steel surface suitable for further processing or painting. Nominal weight 21.385 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 high-strength rectangular tube is commonly specified for heavy structural supports, load-bearing frames, and demanding industrial applications. The 8mm wall thickness provides exceptional structural integrity while maintaining workability. The natural mill finish provides a cost-effective solution for applications where aesthetics are secondary. 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 | 120mm × 80mm × 8mm |
| Weight per Meter | 21.385 kg/m |
| Material | Steel |
| Alloy/Grade | S420MC |
| Standard | EN 10219 / EN 10149-2 |
| 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) | 27.2 cm² |
| Second moment of area(Ix) | 476 cm⁴ |
| Second moment of area(Iy) | 252 cm⁴ |
| Radius of gyration(ix) | 4.18 cm |
| Radius of gyration(iy) | 3.04 cm |
| Elastic section modulus(Wel,x) | 79.3 cm³ |
| Elastic section modulus(Wel,y) | 62.9 cm³ |
| Plastic section modulus(Wpl,x) | 102 cm³ |
| Plastic section modulus(Wpl,y) | 76.9 cm³ |
| Torsional inertia constant(It) | 584 cm⁴ |
| Torsional modulus constant(Ct) | 108 cm³ |
| Surface area per metre(As) | 0.366 m²/m |
| Length per tonne | 46.8 m |
High-strength grades for this size
Strength and indicative capacity for each grade this size is rolled in, compared with the S355J2H wall that carries the same bending load in the same outer size.
| Grade | Min. yield ReH | Tensile Rm | Bending Wel·ReH | Axial A·ReH | S355J2H equivalent |
|---|---|---|---|---|---|
| S420MC | 420 MPa | 480–620 MPa | 33.3 kNm | 1144 kN | Beyond the S355J2H range of this size |
In S420MC, this section carries more elastic bending load than any S355J2H wall rolled in the same outer size; matching it in S355 needs a larger section.
Indicative values from nominal dimensions: Wel × ReH and A × ReH, without buckling, cross-section class or partial safety factors. Not a design check.
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