Previously the standard liner for Sicoma and many others was 10 mm Hardox steel plate. This is becoming hard to get and expensive. Although Ni-Hard is even more expensive, Sicoma has standardized on this material. Its 500 HB hardness and 15mm thickness give it more wear life than Hardox of the same thickness and lower hardness – and it costs you nothing extra. Wear comparison for different materials Another example of Sicoma’s commitment to total quality.