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

Ask for a batch-linked material certificate or test report that is traceable to the offered part or batch, names the issuer, references the applicable drawing or purchasing requirement, and states the actual results against defined acceptance limits. A material designation, a photo, a supplier statement, or a hardness number alone does not establish that the part is equivalent in manufacturing, performance, or service life.

1. Start from the claim, not the site conditions

Abrasive mining work in Kazakhstan makes undercarriage wear important. But operating conditions are context. They do not prove the required metallurgy, heat treatment, or quality level for a SANY-compatible part.

Material designation is only a label

If the supplier says 'same steel' or gives a material name, ask which specification or drawing defines that material. A label alone does not show composition limits, cleanliness, mechanical properties, or heat-treatment response.

Heat treatment changes performance

Two parts with the same nominal material can behave differently if the heat treatment, processing route, or quality control differs. Hardness is one possible check, but a single hardness value does not confirm equivalent manufacturing, performance, or service life.

2. Request batch-linked evidence

The useful evidence ties the material to the specific item or batch you are buying.

Material certificate

Ask for a material certificate from the material producer or part manufacturer. It should show a heat/lot number, material designation, applicable specification, and any required composition or mechanical results. A heat number is a batch identifier for a specific melt of metal; a lot number may be a production batch.

The certificate must be linked to the part number, batch, or delivery. A generic certificate for the same material grade is not enough.

Manufacturing statement

Ask the supplier or manufacturer to state which part number or drawing revision the claim applies to and how the part is traceable to the raw material and heat treatment records.

Heat-treatment record

If heat treatment is relevant to the part, request a record showing the actual part or batch was processed and that the record references the applicable drawing or purchasing requirement. Process parameters are only meaningful when checked against the requirement; do not accept a verbal 'heat-treated' claim without a record.

Test evidence

If the purchasing requirement includes mechanical testing, hardness testing, or other inspection, request the report with the test method, acceptance limit, and actual result. Do not accept a single hardness number as a substitute for the full requirement.

Check the issuer, scope, and revision

Verify who issued the document, what item or batch it covers, and the drawing or specification revision. A document with no issuer, no date/revision, or no batch link is weak evidence.

3. Confirm part identity before material equivalence

Material evidence only helps if the part truly matches the machine position.

Use model, suffix, and serial number

Model alone does not confirm fitment, batch quality, or authenticity. Collect the machine model/suffix and serial number, old part number, nameplate data, and installation position when available.

Use photos and labels

Component or housing photos, cast/forged markings, labels, and readable records can support identification. A photo or supplier statement is not proof of every claim, but it helps match the candidate part.

Check catalogue revision and supersession

If possible, check the applicable parts catalogue revision and documented supersession. If the catalogue or drawing is unavailable, request the missing identification evidence instead of guessing.

Keep part identity, fitment, provenance, sample results, and batch acceptance separate. One document cannot automatically cover all of them.

4. When missing evidence means clarification

If the supplier cannot link the material certificate to the offered batch, or the document has no issuer/revision/specification reference, the equivalence claim is not yet supported.

Ask for clarification

Request:

• exact part number or old part number;
• heat/lot number for the offered batch;
• the applicable drawing or purchasing requirement;
• the document issuer, date/revision, and scope;
• traceability from the certificate to the parts being sold.

Do not accept as proof

• 'same material' or 'OEM-compatible' wording;
• a general material name;
• an unlinked photo;
• a hardness value by itself;
• supplier reputation alone.

5. Procurement next step

Before accepting the part, use a document checklist:

1. Part identity: model/suffix, serial number, old part number, component/housing photos, labels.
2. Batch-linked material certificate referencing the offered heat/lot and part number.
3. Heat-treatment record or manufacturing statement, if applicable.
4. Required test reports with method, acceptance limit, and actual result.
5. Issuer, date/revision, and contact for verification.

If any item is missing or cannot be linked to the offered batch, ask for the missing evidence. Do not accept equivalence from a material name or hardness figure alone.

Parts matching support

For parts matching support, provide model + serial number + old part number + component/housing photos and relevant labels or records. MechLink, an external commercial service, may help organise candidate-part documentation questions for single-item or project purchasing; it is not a materials certification body and does not certify authenticity, fitment, or material properties. Kazakhstan Phone / WhatsApp: +77026412810.

Sources

No external documents, standards, catalogues, test reports, or supplier records were supplied or inspected for this article. The guidance is editorial; acceptance must be made by the responsible parties using the applicable requirements.