# SSAB Domex Tube 460MH

Product-specific selection of cold-formed structural hollow sections, including test conditions, section availability and fabrication/design boundaries.

Reviewed: 2026-11-01

Tags: materials, steel, hollow-sections, producer-products

## Product identity and specification

SSAB's **Domex Tube 460MH** minimum **A5 elongation of 17%** drops by **two percentage points** when **(B + H)/(2T) < 12.5** for square or rectangular sections, or **D/T < 15** for round sections. A hypothetical **100 × 100 × 10 mm** square gives **(100 + 100)/(2 × 10) = 10**, so the adjusted minimum is **15%**. Confirm availability separately. SSAB applies impact testing at **≥6 mm wall**. Check the actual test record. [SSAB 460MH test footnotes](https://www.ssab.com/en/brands-and-products/ssab-domex/product-offer/tube-460-mh)

**SSAB Domex Tube 460MH is a high-strength structural hollow-section product, manufactured by cold forming and high-frequency welding.** SSAB states that it meets or exceeds EN 10219 requirements. This identity does not establish equivalence to a Domex flat product, seamless pressure pipe or hot-finished hollow section. Preserve the full product name and supplied section in purchasing and design records. [SSAB, Tube 460MH product data](https://www.ssab.com/en/brands-and-products/ssab-domex/product-offer/tube-460-mh)

The producer's tubes-group listing identifies EN 10219-1 and EN 10219-2 for 460MH and advertises circular diameters 42.4–323.9 mm, square sections 40 × 40–300 × 300 mm, rectangular sections 50 × 30–400 × 200 mm and walls 2.0–12.5 mm. These ranges do not mean every size/wall combination is offered. Confirm the exact combination, length and supply route. [SSAB, tubes product group](https://www.ssab.com/en-gb/brands-and-products/ssab-domex/tubes-product-group)

## Mechanical properties and their footnotes

SSAB publishes:

| Property | Product requirement |
|---|---|
| Minimum yield strength, Rp0.2 | 460 MPa |
| Tensile strength, Rm | 530–720 MPa |
| Minimum elongation, A5 | 17%, subject to the section-proportion exception below |
| Maximum CEV, 2.0–12.5 mm walls | 0.40% |
| Charpy V-notch | 27 J at −40°C, corresponding to a full-size 10 × 10 mm specimen |

Rectangular sections are tested on their longer side. Minimum elongation is reduced by **two percentage points** when `D/T < 15` for round sections or `(B + H)/(2T) < 12.5` for square/rectangular sections. Impact testing under EN ISO 148-1 is performed for walls **at least 6 mm**. [SSAB, mechanical properties and carbon equivalent](https://www.ssab.com/en/brands-and-products/ssab-domex/product-offer/tube-460-mh)

## Product properties versus structural resistance

SSAB's **2016 Structural Hollow Sections EN 1993 Handbook** maps 460MH to S460MH and separately covers section resistance, stability, joints, fatigue and fracture. It requires checking original applicable standards and calculations; its guidance has a Finnish national-annex background. [SSAB, 2016 handbook, foreword and Table 1.1](https://www.ssab.com/-/media/files/en/infra/news-and-articles/ssab-domex-tube-structural-hollow-sections-en-1993-handbook.pdf)

For design, separate these questions:

- Does the supplied material satisfy the specified product requirements?
- Are cross-section geometry and local slenderness suitable for the load case?
- Are member buckling, connection resistance, deflection and fatigue satisfactory?
- Are toughness, environment and fabrication requirements appropriate for service?

## Geometry, tolerances and section data

The product page provides shape-specific dimensional and geometric tolerance tables; exact length is an enquiry/order agreement. Do not transfer circular-section tolerances to a rectangular section or treat nominal wall thickness as a measurement of the delivered tube. [SSAB, tolerances](https://www.ssab.com/en/brands-and-products/ssab-domex/product-offer/tube-460-mh)

Specify which surfaces and regions are used to locate cutouts, holes and end connections. For a tube inserted into another part, assess corner geometry, seam position, straightness and weld preparation along with nominal width/height. Verify the fit against the actual supplied section rather than a sharp-corner solid-model approximation.

The handbook's general section tables use the family's Double Grade product as their basis. Confirm applicability, geometry, units and effective-section assumptions before using a row for 460MH. [SSAB, handbook §1.4](https://www.ssab.com/-/media/files/en/infra/news-and-articles/ssab-domex-tube-structural-hollow-sections-en-1993-handbook.pdf)

## Welding and further fabrication

SSAB's general welding guidance identifies joint geometry, process, heat input, preheat and consumable choice as factors affecting welded-joint performance. For dissimilar steels, the welding method and parameters must suit both materials. Excessive heating can impair steel properties. These principles require a procedure for the actual tube assembly; they do not supply a universal preheat, filler or heat-input recipe for 460MH. [SSAB, 20 questions about welding](https://www.ssab.com/en/support/how-to-process/how-to-weld/welding/20-questions)

Retain the parent material's full identity when qualifying cutting, bending or welding. Specify seam orientation where the forming or joining method requires it. Evaluate the final geometry after welding and any straightening, because the assembly's inspection condition differs from the original mill product.

The handbook discusses welding distortion and residual stress. Obtain current product-specific advice before heat treatment or hot forming; a Strenx plate heat-treatment table is not a 460MH process instruction. [SSAB, handbook §8.5](https://www.ssab.com/-/media/files/en/infra/news-and-articles/ssab-domex-tube-structural-hollow-sections-en-1993-handbook.pdf)

## Traceability and source dates

Keep the material identity linked to the inspection document through cutting and fabrication. A release record should reconcile the ordered section, applicable mechanical-test conditions, delivered dimensions and any procedure qualifications required by the finished structure. Coating, corrosion allowance and internal accessibility also need a project-specific decision; this product name does not establish weathering-steel or pressure-service suitability.

The live product and support pages cited here display no explicit technical revision date. The SSAB handbook is explicitly the **2016 edition**, with its SSAB foreword dated **24 May 2016** and imprint Keuruu 2016. It is historical technical guidance, not evidence that the standards and national choices described remain current. Obtain the current product sheet and applicable standard editions for an actual order or design.

[Stock forms and dimensions](../stock-forms/index.md)