The Commerce Commission says 59 charges under the Fair Trading Act 1986 have been laid against Euro Corporation Ltd (EuroSteel) alleging it made false and misleading representations about its steel mesh product known as SE615.

It says the charges were filed in the Auckland District Court and relate to representations made between 2012 and 2015.

"The Commission alleges that EuroSteel represented on product labels, identification tags and its website that its SE615 steel mesh was 500E grade steel when it was not, as it did not comply with the testing and sampling requirements for 500E in the Australian and New Zealand Standard AS/NZS 4671:2001," it says.

The Commission says that from April 2013, EuroSteel represented that each batch of its SE615 mesh was independently tested.

"The Commission alleges that not all batches were independently tested."

The Commission has laid charges against a number of companies relating to false and misleading representations about 500E steel mesh.

Timber King Ltd and NZ Steel Distributor Ltd entered guilty pleas and appeared for sentencing in December 2017. The Judge reserved his decision until mid-February.

Steel and Tube Holdings Ltd pleaded guilty to 24 charges and will be sentenced in March.

As well as the charges laid against EuroSteel, the Commission says it has laid charges against a further company, but says it cannot comment further on that at the moment.