The raw material of cast iron surface plate is the high-strength cast iron HT200-300 whose floor surface hardness is Of HT170-240.After the two manual handing such as 600-700 attficial annealing as well as 2to 3 yearsof natural aging,the plate have perfectly resisits abrasion and stable precision.

This kind of work piece measuring plate could be manufacturer with the precision grade 1.2.3 or fine machine.