Die Casting Finishing Guide · September 5, 2026
Stainless Steel Shot for Die Cast Parts
Stainless steel shot may be evaluated for cleaning, deburring and appearance finishing of non-ferrous cast components where a buyer wants to avoid introducing ordinary carbon-steel media. Selection still depends on the casting alloy, part geometry, flash or burr condition, finish target and blasting equipment.
This guide helps die casters and finishing contractors prepare a useful trial and a comparable quotation. It does not replace a part-specific process test.
1. Identify the casting and incoming condition
State whether the workpiece is aluminum, zinc or another alloy, and provide the exact designation when known. Add dimensions, weight, wall thickness, recesses and fragile features. Describe release-agent residue, oxide, flash, gate marks and burr locations with close photographs.
Separate cosmetic surfaces from hidden or machined areas. A process that improves general appearance may affect edges, threads, sealing faces or identification marks, so identify critical areas before a trial.
2. Define a measurable finish target
Terms such as “bright,” “matte” or “uniform” are subjective. Supply an approved reference part, photographs under consistent lighting, or a written inspection standard. If burr reduction is required, identify the burr type and acceptable remainder.
3. Select media size through testing
| Direction | Reason to test | What to watch |
|---|---|---|
| Finer media | Coverage on small features and finer visual texture | Cleaning rate, dust and separation |
| Medium size | Balance coverage and impact | Edges, cycle time and consistency |
| Coarser media | Higher impact for robust parts or heavier flash | Damage, texture and machine compatibility |
Size should be discussed together with particle shape, hardness, operating mix and machine settings. Review Qishun's stainless steel shot and atomized stainless shot, then request a trial around the actual part.
4. Record the blasting equipment
Tell the supplier whether the process uses wheel blast or air blast, the machine model, nozzle or wheel configuration, separator, current media, cycle time and operating settings. Confirm that the proposed size range is suitable for feeding, separation and recovery.
Media selection cannot correct poor coverage, worn components or unstable settings. If results vary, review the equipment and operating mix as well as the new-media specification.
5. Run a controlled part trial
- Select representative parts, including difficult geometries.
- Record incoming condition, media and machine settings.
- Use a fixed cycle and consistent inspection lighting.
- Inspect dimensions, edges, threads and sealing surfaces.
- Record media carryout, part nesting and cleaning.
- Repeat enough parts to assess consistency.
6. Compare total process cost
Price per kilogram is only one input. Record addition rate, carryout, rejected parts, secondary cleaning, cycle time and housekeeping requirements. Use measured trial data rather than an unsupported durability assumption.
7. Complete RFQ checklist
- Casting alloy, dimensions, drawings and photos
- Burr, flash, oxide or appearance issue
- Finish reference and protected critical areas
- Wheel- or air-blast equipment and settings
- Requested size or supplier recommendation
- Trial quantity, monthly demand and destination
- Inspection documents, packaging and trade terms
Frequently asked questions
Can one size finish every die cast component?
No assumption should be made without testing. Geometry, alloy, burr condition and finish target can change the suitable process window.
Should glass beads also be tested?
Buyers may compare media families when appearance is important. See our stainless steel shot versus glass beads guide.
What should appear on the quotation?
Confirm product, size range, packaging, quantity, inspection basis, shipment terms and any trial arrangement. Ask the supplier to state assumptions and exclusions.