EN 10219 standard defines the S420MH square tubes technical requirements for the delivery of round, square and rectangular cold formed welded hollow sections such as tolerances, dimensions and sectional properties.
What are the advantages of S420MH welded structural hollow sections in relation to the open sections?
- better static characteristics
- lighter construction (about 30% less weight)
- smaller surface (it is necessary to protect about 40% less surface area)
- less resistance to air and liquids
- usable interior space (concrete, cables, wires, pipes ...)
- better visual effect
EN 10219 S420MH cold formed hollow sections for steel construction ensure high mechanical resistance and high yield strength. S420MH welded structural hollow sections are used as a fixed load-bearing structures in the building and civil engineering, are suitable elements in mechanical engineering because of its static advantages, and are also used in aerospace and automotive industry. They are not suitable for dynamic loads.
EN 10219 S420MH cold formed hollow sections are produced at room temperature, by cold forming the sheet which is longitudinally welded at the ends, and therefore also known as welded hollow sections. (At the request and the technical possibilities, the inner weld can be removed or smoothed, while the outer weld is already processed in most cases.) Due to the process of cold forming, there is a high level of residual stress remaining in the hollow sections which the can cause cracks during workload.
Cold Formed Hollow Sections EN 10219 S420MH Tubes Inspection and Testing
EN 10219 is subject to tensile testing in accordance with EN 10002-1, charpy impact test in accordance with EN 10045-1.
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