Piston Ring for Audi A4: Magnesium Alloy
This piston ring for the Audi A4 is specified around magnesium alloy, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is packing that arrived crushed at the port, or inconsistent hardness between lots. Both are specification problems, and both are preventable.
Specification
| Product | Piston Ring |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Magnesium Alloy |
| Typical use | Airport Ground Fleets |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 20-30 days after approval |
| Compliance | CCC |
| Packing | 50 pieces per inner box, 500 per carton |
Material options
- Brass — used when the finish has to hold a coating
- Chromed Steel — used when the finish has to hold a coating
- Cast Iron — chosen where wear resistance comes first
- Kevlar Composite — the cost-effective default for volume programmes
- Titanium Alloy — preferred when weight matters more than rigidity
Processes available
- assembly line testing
- robot welding
- electroplating
- shot blasting
- powder coating
- ultrasonic cleaning
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for airport ground fleets. Related applications include wet weather riding, night riding, construction sites, passenger transport, rural transport.
Quality and packing
- In-line inspection with AQL 2.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
What is the minimum order quantity?
The standard MOQ is 3000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 days once you have seen the first piece.
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the CCC-compliant build instead of a fresh interpretation.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
