A supplier says a SANY-compatible undercarriage part uses the same material: what evidence should I request?

Ask for batch-linked evidence that names the material designation and connects it to the specific part number and batch you would receive. A general statement like “same material as SANY” is not enough because it can mean similar appearance, similar source, or only a marketing comparison. Request in writing: the material designation from the drawing or specification, the heat or lot number, the batch traceability record, and a test or inspection report that references that heat or lot and the finished part number. Keep identity, fitment, provenance, sample results and batch acceptance separate.

1. Why “same material” is a comparison, not evidence

Dusty quarry and long-hour work do not prove metallurgy

A part may run for hundreds of hours in a dusty quarry or long-hour construction job and still not meet the required material properties. Visible wear resistance in one site condition does not confirm hardenability, core toughness, cleanliness, heat treatment consistency or the original material designation.

Separate the supplier’s statements

Treat the phrase “same material” as a claim that needs to be split into smaller checkable claims:

• Material designation: what exact designation or internal material code is used?
• Traceability: which heat, batch or lot does the part come from?
• Manufacturing statement: what process and heat treatment does the supplier state, and does it reference that batch?
• Test evidence: what report shows measured properties for that batch and part?

Each can be true or false independently, so do not let one photo, catalogue image or supplier comment stand in for all of them.

2. Evidence to request first

Material designation

Ask for the written material designation from the part drawing, bill of materials or specification. If the supplier will not name it, ask them to point to the applicable drawing or technical file for the exact part number. Do not accept a statement that it is “equivalent” unless the equivalence is shown against an actual requirement you can review.

Heat, batch or lot traceability

Request the heat number, batch number or lot number for the parts you are being offered. Then ask for a document that links that heat or lot to the finished part number or serial range. Without this link, a test certificate for a material grade only shows that some material existed; it does not show your parts came from that material.

Manufacturing statement

Ask for a written statement covering the manufacturing route for the part: for example, whether it is cast or forged, the heat treatment condition, and any surface hardening step. The statement should reference the batch or part number. A generic brochure statement is not batch-linked evidence.

Test or inspection report

Request a test report or inspection record relevant to the material properties. It may include chemical composition, hardness, tensile, impact or other properties, depending on the applicable requirement. The report should identify the part number, heat or batch, date, test method and acceptance limits. If the report is only from the supplier’s own laboratory and acceptance depends on independent verification, treat that as a decision for the responsible engineer or purchaser.

3. Confirm identity and fitment before relying on material claims

Model alone never confirms fitment, batch quality or authenticity. Before spending much time on material evidence, collect the missing identity information:

• Machine model and suffix, not just “SANY excavator” or a general series.
• Machine serial number.
• Nameplate data if accessible.
• Old part number from the removed component or parts book, not only a description.
• Component or housing photos showing mounting points, bolt pattern, pin bosses or wear surface.
• Installation position, such as which side or which roller position.
• Applicable catalogue revision and any documented supersession chain if the part number has changed.

Ask for the missing evidence

If the supplier cannot tie its material claim to a specific part number and your machine identity, ask them to provide the written traceability and fitment reference before you compare candidates.

Parts Matching Support note

For parts information or procurement clarification, prepare model + serial number + old part number + component/housing photos and relevant labels or records. MechLink may help organise candidate-part documentation questions for single-item or project purchasing. It is an external commercial information-support service, not a materials certification body, and does not decide acceptance.

MechLink WhatsApp for parts information and procurement enquiries serving readers in this market: +77026412810. This is not a SANY official contact and does not imply a local office or local stock.

4. What remains unverified

This answer cannot inspect the part or records

No external source documents, actual supplier records, laboratory reports or machine-specific catalogue pages were inspected for this answer. Therefore no claim is made that a specific material grade or test result is correct. The checks above are general documentary checks, not a certification.

A photo or supplier statement is not proof of every claim

A clear photo may help identify shape and condition, but it does not prove chemistry, heat treatment, batch origin, authenticity or fitment. A supplier statement may be true, but it still needs supporting records if material equivalence is important to your acceptance decision.

Acceptance decision

Only the responsible parties can decide acceptance using the applicable requirements, manuals, catalogues and supplied technical records. This article does not certify a product or perform testing.

5. Procurement next step

Ask the supplier to reply in writing with the following:

1. The exact part number and revision being offered.
2. The material designation from the applicable drawing or specification.
3. The heat, batch or lot number for the offered parts.
4. A batch traceability record linking that heat or lot to the finished part number.
5. A test or inspection report for the relevant material properties, with part number and heat/batch identified.
6. A manufacturing statement for the route and heat treatment, referenced to that batch.
7. Fitment confirmation against your machine model/suffix, serial number and old part number.

Compare that written reply with the applicable parts catalogue or maintenance manual for your machine. If the material property is safety-critical or high-cost, have a qualified engineer or independent inspector review the documents before acceptance. Do not rely on the phrase “same material” as evidence on its own.

Sources

No independent third-party sources were inspected for this answer. The guidance is general procurement and documentation practice, not a substitute for the applicable SANY parts catalogue, maintenance manual, supplier technical records, or review by a qualified engineer or inspector.