Direct answer: For crusher wear parts the working set of records is four: a material certificate (heat or melt analysis) whose heat number matches the casting, a dimensional report against the drawing, a hardness record of the delivered condition, and a visual and marking record for traceability. NDT — ultrasonic, magnetic particle or dye penetrant — and third-party inspection are added where internal soundness matters, such as structural castings or heavy-impact parts, and are arranged against a named scope rather than as a general instruction. Specifying the scope before production is what puts the records on the shipment instead of in a later email thread.
Why asking for "all certificates" produces paper, not evidence
Inspection records are what turn a quotation into a verifiable order. Buyers who specify the records they need before production receive evidence with the shipment; buyers who ask afterwards usually wait. For crusher wear parts, the meaningful records fall into a short list, and each one serves a different purpose — which is why asking for "all certificates" tends to produce paper rather than evidence.
The material certificate is the base record
Material certificates (heat or melt analysis) are the core record: they confirm the grade that was actually poured, against the standard agreed for the order — for manganese steel, for example, the chemistry of the Mn13 or Mn18 family per an ASTM, DIN or GB equivalent. Three checks make the certificate worth reading:
- the heat number on the certificate matches the heat number marked on the casting
- the chemistry is compared against the agreed standard, not against a generic "manganese steel" description
- carbon equivalent is stated where the part will be welded in service
Dimensional, hardness and visual records
Dimensional, hardness and visual records cover the delivered part itself, and each answers a different question. Dimensional reports confirm the part against the drawing: the critical dimensions, the bolt-hole positions and the tolerances. Hardness records show the delivered hardness range, which matters for wear parts where hardness is the accepted indicator of performance — read as-cast values against the agreed range, and treat surface hardness separately from core hardness where the grade work-hardens. Visual inspection records cover surface quality, marking and obvious defects. For most crusher wear parts this trio, plus the material certificate, is the working set:
| Record | What it proves | When it earns its cost |
|---|---|---|
| Material certificate | The grade poured and its chemistry | Always — it is the base record |
| Dimensional report | Fit and interchangeability | Always for OEM replacement parts |
| Hardness record | The delivered condition after heat treatment | Always for wear parts |
| Visual / marking record | Traceability and surface acceptance | Always, and cheap to add |
When NDT and third-party inspection earn their cost
NDT — ultrasonic, magnetic particle or dye penetrant testing — is specified where internal soundness matters most, such as structural castings or parts that will take heavy impact, and where a casting defect would cause a failure rather than faster wear. Third-party inspection by an agreed body can be added when your project or your customer requires independent verification, and is usually arranged against a named scope rather than as a general instruction. Each of these has a cost, so the scope should match the part, not be added uniformly: a blow bar and a 6-tonne frame do not need the same testing.
Specify the records in the review
The way to get the right records is to specify them in the review: material standard, hardness range, dimensional checks, NDT or third-party inspection, and the documentation language. Records should be agreed with the order and travel with the shipment, because a certificate that arrives after the container has been released cannot stop a bad part from being installed. DINGDAR agrees the inspection and acceptance scope before production and ships the agreed records with the order — so the buyer's incoming inspection step is short and the evidence trail is complete. See the jaw crusher wear parts page for the dimensional points that are usually inspected, read what information a quote needs, or send your required inspection scope through the contact form. Start with the crusher wear parts quotation checklist before sending the request.