Calcined Alumina A75

A75 Alumina Abrasive

Median particle size 48.05 μm | Al₂O₃ 99.80% | For stainless-steel grinding and polishing formulation development

A75 is an alumina abrasive sample with a median particle size (D50) of 48.05 μm measured by wet laser diffraction, a volume-distribution span of 1.080, and an Al₂O₃ content of 99.80%. It is suitable for evaluation in grinding, pre-polishing, and surface finishing of stainless-steel tableware and kitchenware; in grinding or polishing-formulation development for stainless-steel sheet, strip, pipe fittings, flanges, and hardware; and in composite-abrasive systems requiring an alumina abrasive with a median particle size near 48 μm.

Specifications

Particle-Size Distribution (Volume Distribution)

Chemical and Physical Properties

Suggested Evaluation Areas

• Grinding, pre-polishing, and surface finishing of stainless-steel tableware and kitchenware

• Grinding or polishing-formulation development for stainless-steel sheet, strip, pipe fittings, flanges, and hardware

• Composite-abrasive systems requiring an alumina abrasive with a median particle size near 48 μm

Application note: These are suggested evaluation areas, not performance guarantees for a particular workpiece, process, or surface grade. Results depend on substrate grade, initial surface, binder or slurry, pressure, line speed, equipment, and downstream steps.

Test Method and Data Scope

The source report labels this value D100. Confirm its definition, test repeatability, and control limit with the testing party before using it as an incoming-inspection criterion. All values on this page are from one tested sample only; current-batch supply specifications should be governed by the agreed COA, TDS, or purchase contract.

FAQ

What is the median particle size of A75?
The A75 sample recorded a D50 of 48.05 μm by wet laser diffraction, reported as a volume distribution.

Can A75 be used for stainless-steel tableware and kitchenware?
It may be evaluated for grinding, pre-polishing, and surface finishing of these products. The report does not include processing results on tableware or kitchenware, so confirmation through trials on the actual equipment and formulation is required.

Is A75 alpha alumina?
This report does not include XRD or phase-composition testing. An alpha-phase claim cannot be made based on this report alone.

Can A75 deliver a mirror finish or prevent burning?
The report does not include surface roughness, gloss, removal-rate, temperature, or burn testing on workpieces. Mirror finish and burn prevention must be verified in the actual process.

Can these values be used as acceptance limits for every batch?
No. The values are from a single sample report. Batch acceptance should rely on the pre-agreed parameters, methods, tolerances, and current-batch COA.

Information to Include in an Inquiry

For a relevant A75 evaluation, provide the workpiece material and starting surface, target finish or roughness, current abrasive size, dry or wet process, binder or polishing slurry, equipment type, expected volume, target market, and any required acceptance criteria.