Heat number traceability: compare certificate and shipment references

Keep different identifiers separate

Use separate fields for the certificate identifier, heat number, purchase order and shipment line. Copy each identifier with its printed label before deciding what it represents. Do not treat a batch, lot or serial number as a heat number unless the source or issuer explains the relationship.

As one manufacturer example, SSAB’s Strenx documentation describes product marking that includes heat and serial numbers to maintain traceability. That is an example of a manufacturer’s scheme, not a universal numbering format. Ask the supplier to explain unfamiliar identifiers instead of inferring their meaning from their length.

Create one comparison per shipment line

Take the expected heat and grade from your controlled shipment or order record. Place the observed certificate heat and grade beside them, and keep the source page. For a shipment containing several heats, create separate comparisons rather than treating the first match as evidence for every line.

When references differ, inspect the original before changing anything. Check possible reading errors such as O and 0, clipped prefixes, continuation rows and revision changes. Retain leading zeros and preserve the original text even if your internal process also uses a normalized reference.

Document and resolve differences

A useful exception identifies the shipment line, the expected reference, the observed reference and the document location. For example, “shipment line 2 expects H-008419; certificate page 1 states H-008491.” That gives the supplier a concrete question to resolve.

Keep a mismatch open until supporting evidence or an authorized correction explains it. Record the reason and the document revision used for the final decision. Changing a number in a review tool does not change the source certificate or establish a link to physical material.

Use a review tool for the comparison record

MeltLedger lets you enter up to 20 shipment lines per review and compare their expected heat and grade references with certificate observations. Review the proposed values against their source pages, then save a snapshot and export the evidence.

The comparison is intended to make agreements, differences and missing references easier to see. It does not inspect product markings, track cut pieces or provide a warehouse traceability system. Keep those controls in your existing receiving and material-handling process.

Fictional mismatch to investigate

Common questions