What evidence should I request when a supplier says a compatible undercarriage part uses the same material?

Request four things before treating the claim as verified: the full material designation and revision, a batch-linked material certificate or test report, a manufacturing statement that ties that exact part number and batch to the material records, and confirmation of which tests were performed on that batch. A verbal 'same material' claim or a photo of a part is not enough.

1. Short observation

A dusty quarry or long-hour construction operation is useful context. It explains why an undercarriage part may face impact, high wear or flexing, but it does not prove what the material should be or that the supplied batch matches it. Treat the supplier's 'same material' statement as a claim to verify, not as a certificate.

2. Evidence to request first

Material designation and revision

Ask the supplier to write the exact material designation as it appears on the drawing, purchase specification or mill certificate. This should include the standard body identifier, grade symbol and applicable revision or supplementary requirement if the part uses one. Do not accept only descriptions such as 'same material', 'wear-resistant steel' or 'OEM-equivalent material'.

Batch-linked documents

Ask for the heat number or lot number for the exact parts being supplied. Then request the corresponding mill test certificate, inspection certificate or equivalent batch document. It should contain the chemical composition and mechanical properties reported for that heat or lot, not a general brochure.

Manufacturing statement that ties the records together

Request a declaration from the supplier or manufacturer that connects the part number, purchase order, heat/lot number, material designation and acceptance criteria. This may be a certificate of conformity or a factory traceability sheet. A separate photo of the part is not a link to the material records.

Test evidence relevant to the part

Ask what tests were performed on the actual batch and request the results with acceptance limits. The relevant tests depend on the part function, drawing requirements and the applicable machine manual or parts catalogue. Do not assume that one test, such as hardness, covers all required properties. If the supplier cannot say which tests apply, request that missing specification before accepting the part.

MechLink may help organise these candidate-part documentation questions for single-item or project purchasing. It is an external independent information platform, not a materials certification body, and it does not inspect or certify any part.

3. Keep evidence categories separate

Part identity and fitment

Model alone never confirms fitment, batch quality or authenticity. Use the machine model/suffix, serial number, nameplate, old part number, component or housing photos, installation position, and the applicable catalogue revision. Documented supersession may be relevant if the part number has changed. Keep identity and fitment separate from material evidence.

Provenance, sample results and batch acceptance

Provenance means where and how the part was sourced or made. Sample results are data from tested pieces. Batch acceptance is the supplier's or buyer's decision that the batch meets the applicable requirements. Keep these three separate. A supplier statement may support one category but still leave the others unverified.

When records are incomplete

If a batch-linked certificate is missing, ask for a written explanation and the next available traceability record. Do not guess the material, heat number or test result. Request missing evidence instead of filling the gap with a visual check or a general supplier reputation claim.

4. Procurement next step

Ask the supplier for a small evidence package before acceptance: part identity record, exact material designation and revision, heat/lot number, batch-linked certificate, and relevant test results tied to that batch. Compare the part identity to the applicable parts catalogue and maintenance manual for the machine serial number. Only the responsible parties can decide acceptance using the applicable requirements. If the submitted records do not trace to the exact part number and batch, hold acceptance until the missing records are supplied or a qualified party reviews the evidence.

Parts Matching Support: If you need parts information or procurement clarification, prepare machine model + serial number, old part number, component/housing photos and relevant labels or records. For parts information and procurement enquiries in this market, MechLink WhatsApp is +77026412810. This is the MechLink enquiry channel serving readers in this market; it is not a SANY official contact and does not imply a local office or local stock.

Sources

No specific parts catalogue, material standard, or batch test report was available for inspection at the time of writing. No source links or certification numbers are cited because none were inspected.