Lost-wax cast closed impeller balanced to ISO 1940-1 G6.3, dye penetrant inspected and hydrostatically tested before dispatch.
| Property | Value |
|---|---|
| Process | Investment casting (lost wax), silica sol shell |
| Material | CF8M / ASTM A351 (316 equivalent) |
| Size range | Ø120–Ø420 mm, impeller diameter |
| Wall thickness | ≥3.5 mm minimum, cast-in |
| Dynamic balance | ISO 1940-1, grade G6.3 |
| NDT | Dye penetrant per ASTM E165; radiography on request |
| Pressure test | Hydrostatic at 1.5 × design pressure, certificate per serial number |
| Heat treatment | Solution annealed at 1040 °C, water quenched |
| Traceability | Heat number cast into the hub, spectrometric report retained 10 years |
FOB Foshan. Tooling charge of approximately $2,400 applies to new impeller geometry and is credited against volume above 500 pcs.
The part, standard and supplier are already filled in. Two or three sentences about the application is enough for a firm answer.
A pump OEM in North Rhine-Westphalia was rejecting roughly one in eight CF8M impellers from an incumbent foundry on balance and wall-thickness grounds, and was absorbing the cost of returning failed units from Germany.
A Tier-1 supplier needed a die-cast bracket launched against a compressed programme, and had been burned before by suppliers who submitted incomplete PPAP dossiers that triggered customer rejections late in the launch.