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

1. Direct answer

Request a written claim that names the exact material designation, the specific part number and batch, and the supporting document type. Then request the batch-linked document itself. A verbal statement, catalogue photo, or supplier brand name is not enough.

For an undercarriage part, ask for:

• exact material designation claimed for the supplied part;
• the drawing or specification number and revision the designation comes from;
• a batch, heat or lot number marked on the part or delivery papers;
• a material certificate or mill test report matched to that batch;
• relevant test results with test method and acceptance limit;
• the old part number, machine model/suffix, serial number and installation position so fitment can be checked separately.

2. Why a dusty quarry or long-hour site is context, not proof

Dust, impact and long operating hours can make undercarriage wear worse. But site conditions do not prove chemical composition, hardness, toughness or manufacturing route. They only explain why you are asking for stronger evidence.

Do not accept a supplier argument that a part withstands quarry use because it looks heavy or because another machine used it. That is operational context, not metallurgical evidence.

What this means for the request

Keep the site description in your internal risk note. In the supplier question, ask for documents that can be checked against a stated requirement.

3. Useful evidence checks

Material designation

Ask the supplier to state the exact material designation in writing. The designation may come from a SANY drawing, a compatible part drawing, a supplier internal specification, or an equivalent national or international designation. The key is that the supplier names it and gives its source.

Do not accept only the words 'same material' or 'SANY-grade steel'. That is a conclusion, not a designation.

Batch-linked documents

A material certificate is useful only when it can be tied to the exact part or batch offered. Request:

• heat number, lot number or batch number;
• part number or stock item linked to that batch;
• supplier delivery note or label showing the same batch;
• marking on the part or packaging where practical.

If the certificate is generic and has no batch link, it does not prove the part you are buying came from that tested material.

Manufacturing statement

Ask for a written statement covering:

• manufacturer or supplier name;
• part number and description;
• material designation;
• drawing or specification number and revision;
• production batch or date range;
• statement of what was made and where it was made.

This is a traceability statement, not a material property test. It helps show the claimed manufacturing route and origin.

Relevant test evidence

Request test results only for properties relevant to the undercarriage part in question. This may include:

• chemical composition;
• hardness;
• impact or toughness values;
• dimensional or hardness-check results if the part is heat-treated.

The supplier must also provide the test method or standard name or code and the acceptance limit. Without the method and acceptance limit, a single reading is not meaningful.

Do not assume one test type covers all parts. A test useful for a track link may not be the key evidence for a pin, bushing, roller or idler.

4. Keep part identity, fitment, provenance and batch acceptance separate

Model alone never confirms fitment, batch quality or authenticity. Before discussing material, confirm the part identity with:

• machine model and suffix;
• serial number;
• nameplate details;
• old part number;
• component or housing photos;
• installation position;
• applicable catalogue revision and documented supersession where relevant.

Keep these as separate questions:

• Identity: which part is being supplied?
• Fitment: does it match the machine configuration?
• Provenance: who made it, and from what supplied batch?
• Material acceptance: which batch-linked tests support the stated material?

A photograph or supplier statement is not proof of every claim. It can support identification, but it does not certify material.

5. Missing evidence and procurement next step

If the supplier cannot provide a written material designation, batch-linked material document, manufacturing statement, or relevant test evidence, do not fill the gap by guessing. Request the missing document or mark the material claim as unverified.

A practical order of request is:

1. old part number and machine identification;
2. supplier part number and material designation;
3. batch or heat number;
4. certificate or test report matched to that batch;
5. drawing or specification reference and acceptance limits.

If the buyer cannot inspect a source document, the remaining item should be recorded as unverified. Only the responsible parties can decide acceptance using the applicable requirements.

MechLink is an external commercial platform, not a materials certification body and not a SANY official contact; it does not imply a local office or local stock. It may help organise candidate-part documentation questions for single-item or project purchasing, but it does not test material or certify a part.

Parts Matching Support

Parts buyers who need help matching undercarriage parts or checking what documentation to request can prepare machine model + serial number + old part number + component or housing photos and any labels or records. MechLink can help organise the enquiry, but final fitment, material acceptance and approval remain with the buyer, supplier or responsible engineer. WhatsApp: +77026412810.

Sources

No external standards, catalogues, test reports, or manufacturer documents were inspected for this article. The recommendations are general equipment-parts procurement verification practice: use part identity records, batch traceability, drawing or specification references, and separation of supplier statements from test evidence. They do not replace the applicable SANY manual, parts catalogue, drawing, or purchase specification.