Casting defects are not all equal. A small surface mark may be cosmetic, while porosity near a sealing face or bore can make a part unusable. Buyers should discuss functional risk before quotation.
Buyer takeaway: the best answer depends on the drawing, quantity, material, machined areas, and inspection requirement. Use the checklist below before comparing quotes.
Defects That Often Affect Function
- Porosity near sealing faces, machined bores, threaded holes, and pressure areas.
- Shrinkage around thick sections, bosses, ribs, and hot spots.
- Warping or deformation that affects flatness, hole position, or assembly fit.
- Cracks, cold shuts, misruns, and surface defects in load or sealing areas.
What to Tell the Supplier
- Which surfaces must seal, carry load, locate bearings, or fit another component.
- Whether the part will hold pressure, fluid, vacuum, or corrosive media.
- Whether X-ray, leakage test, pressure test, CMM, or material report is required.
- Which defects are cosmetic and which are functional rejection points.
How to Reduce Disputes
- Agree on inspection requirements before production.
- Mark critical zones on the drawing instead of using general quality wording.
- Confirm whether surface treatment may reveal or hide casting defects.
- Keep sample approval notes tied to measurable requirements where possible.
Related Pages
FAQ
Can all casting defects be avoided completely?
The practical goal is risk control and agreed acceptance criteria. The acceptable level depends on material, process, function, and inspection method.
When should X-ray or leakage testing be requested?
Before quotation, especially when the part has pressure areas, internal cavities, sealing faces, or machined surfaces where porosity could be exposed.
Send the drawing, material, quantity, machined areas, tolerance notes, inspection requirements, and delivery expectations. We will review the practical casting and machining route before quotation.
