1.     The casting surface must not have cold shuts, cracks, shrinkage holes, penetrating defects, or severe defects such as undercasting or mechanical damage.

2.     The casting should be cleaned thoroughly, with no burrs or flash. Non-machined pouring and riser surfaces should be cleaned and leveled with the casting surface.

3.     The casting's cast characters and markings on non-machined surfaces should be clear and legible, positioned and formatted according to the drawing requirements.

4.     The roughness of non-machined surfaces of the casting, in sand casting (R), should not exceed 50μm.

5.     The casting should have removed the pouring system, flash, etc. The remaining material from the pouring system on non-machined surfaces should be scraped and polished to meet surface quality requirements.

6.     The molding sand, core sand, and core bones on the casting should be removed thoroughly.

7.     For inclined sections of the casting, the dimensional tolerance zones should be symmetrically arranged along the inclined surface.

8.     The molding sand, core sand, core bones, excess material, and adhered sand on the casting should be scraped and ground smooth, cleaned thoroughly.

9.     Defects such as misalignment, raised platforms, and casting bias should be corrected to achieve smooth transitions and ensure the appearance quality.

10. Wrinkles on non-machined surfaces of the casting should have a depth less than 2mm, with a spacing greater than 100mm.

11. Non-machined surfaces of machine product castings should be treated with shot blasting or drum treatment to achieve cleanliness level Sa2 1/2.

12. The casting must undergo water toughening treatment.

13. The casting surface should be flat, and pour gates, burrs, adhered sand, etc., should be removed thoroughly.

14. The casting must not have casting defects such as cold shuts, cracks, holes, or any other defects that would impair its usability.