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  • The sustainable alternative

Magnelis® ZM120 assessed by the Steel Construction Institute

The Steel Construction Institute has just published a report (download here) describing the performance of Magnelis® ZM120 coating against corrosion, compared with traditional Z275 coating, applied to cold formed sections used in light steel framing. SCI concludes that Magnelis® ZM120 provides corrosion protection which is not less than the corrosion protection provided by Z275 coating.

This independent review and assessment of SCI included the surface, cut edges, deformed elements and welded tubes, and was based on the results of a large palette of tests including:

  • Salt-spray tests according to ISO 9227
  • Cyclic tests VDA 621-415 and ECC1
  • Outdoor exposure tests of up to 10 years

The conclusions and recommendations of SCI are:

  • Magnelis® ZM120 provides corrosion protection which is not less than the corrosion protection provided by Z275 coating.
  • This conclusion applies to surface protection and to protection of cut edges.
  • Magnelis® ZM120 is suitable for the same applications as the Z275 coating which is typically specified in UK and Irish construction.
  • The design life predictions for the Z275 coating as stated in SCI publication P262 are also applicable to Magnelis® ZM120.

Magnelis® ZM120 is already widely used to manufacture cable trays and electrical equipment, flooring systems, indoor ventilation equipment, metallic furniture, ceilings, walls and partitions, racking systems, profiled members, opened and closed profiles...

Replacing galvanised steel with Magnelis® significantly reduces the environmental footprint of manufactured products thanks to

  • The lower use of raw materials and natural resources at galvanising stage
  • The reduction of zinc run-off during the product’s life
  • The increase of the lifetime of the finished product.


In comparison with galvanised steel, Magnelis® offers additional benefits during profiling & bending, forming operations, welding and cutting.

Magnelis® is produced in several ArcelorMittal mills, available worldwide with dedicated and optimised service offers in each region.

All information on Magnelis® is available at
industry.arcelormittal.com/magnelis


About SCI

The Steel Construction Institute has been a trusted, independent source of information and engineering expertise globally for over 30 years, and is one of the leading, independent providers of technical expertise and disseminator of best practice to the steel construction sector.
SCI supports everyone involved in steel construction, from manufacturers, consulting and design engineers, architects, product developers to industry groups and peers.

More info: steel-sci.com

Copyright pictures:

Banner: beSteel

Right column: SCI, ArcelorMittal

All others from shutterstock.com: Roman023_photography, HacKLeR, Pavel L Photo and Video.