Regardless of which material the castings are made of, they have the following requirements:
1. Material requirements. There are hardness, tensile strength, elongation and impact toughness.
2. Dimensional accuracy and position accuracy. Different castings have different requirements, different size and geometric tolerance standards and different tolerance grades.
3. Requirements for acceptance of other defects of castings shall be stipulated in accordance with operational requirements. Such as stomata, sand hole, shrinkage, shrinkage, slag inclusion, sand inclusion, cracks...
4. Requirements for defect repair.