Euro both manufactured SE615 steel mesh in New Zealand and imported it from overseas.
The company, however, failed to comply with the testing procedures set out in the Australian/New Zealand Standard for reinforcing steel when testing locally made steel, the Commerce Commission said in a statement today.
The charges were for about 137,900 sheets of locally manufactured SE615 and 104,900 imported sheets.
In her judgment, Judge Sharp said: "Standards are solutions that are promulgated in order to make buildings, inter alia, safe. Failure to comply with them, can lead to significant prejudice to the consumer public especially where the departure has been such as to render unsafe the use of a product.
"The Commission is correct therefore in suggesting, given that we are dealing here with a product related to earthquake safety, compliance is critical and a deterrent response is appropriate."
Commerce Commission chairwoman Anna Rawlings said standards are in place to give the public confidence that buildings in New Zealand are constructed with materials which meet prescribed requirements.
"Consumers have no choice but to trust and rely on representations that companies make about compliance with standards, at least in part because they cannot verify the performance characteristics of building materials themselves. It is critical that applicable standards are adhered to and properly described to consumers."