What Evidence Should You Request When a Supplier Says a SANY-Compatible Undercarriage Part Uses the Same Material?

Ask the supplier to prove the claim with a document chain that links the supplied part or batch to an agreed material specification. A material name, grade statement or hardness value alone is not enough. Request the exact material designation and specification reference; a batch-linked material certificate or test report from an identifiable issuer; a manufacturing statement for the supplied item or batch; and heat-treatment or test records where the application requires them.

一、Start With the Claim and the Working Context

Kazakhstan abrasive mining jobs put undercarriage parts under impact, wear, fatigue and heat. That context explains why equivalent material matters, but it does not prove any metallurgy.

“Same material” can mean different things: the same nominal grade, the same chemical composition, the same mechanical properties, the same heat treatment, or only a similar trade name. Ask the supplier to state exactly what “same” means and against which requirement.

二、Separate Designation From Manufacturing and Performance Evidence

2.1 Material designation is only a starting point

Request the exact designation and the specification reference that the supplier is comparing against. This may be a standard designation, a mill designation or an internal SANY/purchaser drawing note. A verbal or catalogue statement such as “same steel” is not a material comparison.

Do not invent the acceptable grade or accept a generic grade guess. The relevant requirement should come from the applicable SANY drawing, the parts catalogue revision or the purchaser’s written purchasing specification.

2.2 Batch-linked material document

Ask for a material certificate, test report or traceability record that states the heat number, lot number or batch number and links it to the specific parts being supplied.

Check the issuer: is it a mill, an independent laboratory or the supplier’s internal report? Check the scope: does the document cover the actual supplied material, or only a representative sample or a general product family? Check the batch link: the number on the document should match the labels, invoice, packing list or part records.

2.3 Manufacturing statement and heat-treatment record

Material equivalence also depends on how the part was made. Ask for a manufacturing statement covering the supplied item or batch and any heat-treatment record required by the specification.

Hardness alone does not prove that the heat treatment, case depth, microstructure or residual stress state is equivalent. If the applicable requirement calls for a specific heat-treatment route or property, request the record for that route or property rather than a salesman’s summary.

2.4 Relevant test evidence

Request test evidence only where the specification calls for it. That may include chemical composition, mechanical properties, hardness, metallographic examination or non-destructive testing. Ask for the test method, result and acceptance limit, and confirm the test was performed on the supplied item, batch or a traceable sample.

A single hardness reading or a material datasheet is not a substitute for a test report against the agreed requirement.

三、Useful Checks Before Accepting Equivalence

Verify the issuer. An identifiable company, report number, date and signatory are more useful than an unsigned claim.

Verify the scope. The document should state the material description, grade or internal code, and the part or casting/forging/bar/plate item covered.

Verify the item and batch link. The heat/lot number, purchase order reference or supplier batch reference should connect the document to the parts in the offer.

Verify the applicable requirement. The evidence should be compared with the correct drawing revision, catalogue note or purchasing specification. A certificate can be real but still not answer the question if it was checked against the wrong requirement.

Keep identity and quality separate. Model, suffix, serial number, nameplate, old part number and photos may help confirm fitment or identity. They do not by themselves confirm that a part was made from the required material or passed batch acceptance.

四、When the Evidence Is Missing

If the supplier cannot provide a traceable document chain, the missing links justify a clarification request rather than acceptance of equivalence.

Ask specifically for the missing item: the drawing or specification reference, the batch-linked material record, the manufacturing statement or the test evidence.

If the supplier only repeats “same material” or provides a hardness number, the claim remains unverified. The responsible parties may decide to reject the claim, request additional records, or arrange testing under agreed sampling and acceptance rules. This article does not direct you to perform hazardous material testing.

五、Procurement Next Step

Send a short written request to the supplier:

1. The applicable SANY drawing revision or purchaser material specification.
2. The supplier’s exact material designation and comparison to that requirement.
3. The batch-linked material certificate or test report with issuer and heat/lot number.
4. The manufacturing statement and heat-treatment record for the supplied item or batch.
5. Any test evidence with method, result and acceptance limit.

Keep the response split into three files: part identity/fitment evidence, material and manufacturing evidence, and batch acceptance evidence. Do not allow a material claim to substitute for fitment confirmation or vice versa.

Parts Matching Support

MechLink is an external commercial service and is not a materials certification body. It can help organise candidate-part documentation questions for single-item or project purchasing. If you send model, serial number, old part number, component/housing photos and relevant labels or records to +77026412810, the team can structure the missing-evidence request. This does not verify fitment, authenticity or metallurgy.

Sources

No external standards, SANY drawings, supplier certificates or catalogue pages were inspected for this article. The guidance is based on general procurement documentation practice and should be checked against the actual applicable drawing, purchase specification and supplier records.