Metal Traceability Marking
A traceability system is only as good as the mark on the part. We put serials, lot and heat numbers, UID plates and record-linked codes permanently into the metal, so the identifier is still readable after heat treat, plating, washdown and a decade in service.
Marking the code is one half. Reading it reliably is the other, covered on Data Matrix code marking.
The mark is the link, not the record
Traceability fails in two ways. Either the record is incomplete, or the part and the record stop being connected. The second one is physical: the label fell off, the ink washed away, the stamped number corroded into a smudge, or the mark went under a bracket during assembly.
Laser marking solves the physical half. The identifier is part of the metal, so the number on the part is the same number in your system when the part comes back for service three years later.
It also means the mark has to be designed, not just applied. Where it sits and how deep it goes decides whether it is still readable after the next process step.
What we mark for traceability
Choose the identifiers your quality system needs. We mark them in one pass, in one consistent layout.
Serial numbers
A unique, sequential number on every part, so a returned unit can be tied back to its build record, date and batch.
Lot, batch & heat numbers
The material or process lot marked on the part itself, which is what makes a recall or a material review possible without guesswork.
Machine-readable record keys
A Data Matrix code carrying the record ID or URL, so scanning the part opens its history instead of requiring someone to retype a serial.
UID & asset tags
UID data plates and asset IDs laid out to your drawing or MIL-STD-130 layout, for equipment that has to be tracked through its service life.
Date & revision codes
Build date, revision level and supplier code on the part, so version mix-ups get caught at inspection rather than at the customer.
Manufacturer & origin marks
Manufacturer ID, country of origin and model designation, marked cleanly and identically across the whole run.
Will the mark survive what happens next?
This is the question worth answering before production, not after. It decides both the method and the order of operations.
Heat treatment & brazing
High-temperature processing after marking can change the contrast of an annealed mark. Mark after heat treat, or tell us so we plan for it.
Plating, anodize & passivation
These add or remove surface material, which can bury a shallow mark or brighten it unpredictably. Sequence matters more than method here.
Abrasion & handling
Parts that get binned, stacked or refinished need a recessed deep-engraved mark. A flush annealed mark is readable but shallow.
Cleaning & chemicals
Solvent, caustic wash and steam do nothing to a laser mark. They strip labels, which is why parts that get washed are usually laser marked.
Five decisions to make before we mark
Get these right and the marking job is straightforward. Leave them open and the mark ends up somewhere convenient instead of somewhere useful.
Which identifier is the key
Serial, lot, or a database record ID. Pick one that the code points to, because a code carrying three identifiers usually carries none of them legibly.
Where the mark must live
A spot that survives installation and stays accessible to a scanner in service. Marks placed under a bracket are common and useless.
What happens to the part after marking
Heat treat, plating, paint, assembly and refinishing all come after the mark. Each one can change how it reads, so the sequence is a marking decision, not a production afterthought.
How it gets read
Handheld scanner, fixed-mount reader at a station, or a phone in the field. Reading distance and angle decide symbol size more than the code type does.
What happens on rework
Parts get reworked, and the original mark may be removed or overmarked. Decide the rule now, so the record stays honest later.
How we support the program
- First article marked and scanned before the production run starts
- Photos and the scan result sent for your sign-off
- A saved mark file per part number, so repeat orders look identical
- Variable data run from your spreadsheet, one unique mark per part
- Consistent layout across lots, so a scanner setting does not change per shipment
What stays with you
- -We do not certify compliance with a traceability standard. We mark and verify the physical identifier.
- -Device records, quality records and regulatory database submissions (including UDI) stay with you as the manufacturer.
- -We are not a plating, anodizing or passivation house, so we mark the finish you send us.
- -We do not integrate with your ERP or MES. The data flows through a spreadsheet, in and out.
- -If your requirement needs equipment we do not run, we say so before you ship parts.