# Forging Heat Number Traceability and Mill Cert Control > Source: https://netray.co/resources/forging-heat-number-traceability-and-mill-certs > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Knowledge Base ## Short answer How forge shops keep heat number traceability from mill cert to finished forging: lot splits, marking, cert packages, and audit-ready retrieval. ## Category erp-general ## Content **Intro:** Forging heat number traceability means being able to show, for any finished forging, which heat of bar it came from, the mill certification for that heat, and the processing and test records in between. It is a requirement on most aerospace, energy and defense work and a quiet expectation in many industrial orders. The common failure is not missing paperwork but paperwork that cannot be found quickly: a customer asks about one lot and the answer takes days of digging. This guide covers how to hold the chain and verify the certs. **Sections:** #### Where the Chain Breaks in a Forge Shop **Body:** Traceability is easiest to lose at points where material changes form. Bar is cut into billets, and the heat stamp or tag stays on the remainder. Billets from two heats are forged on the same shift. Forgings are loaded into a heat treat furnace with other jobs. Parts go to an outside processor and come back mixed. Each handoff needs a rule: mark or tag every billet group, record the heat on the work order at issue, keep lots physically separated, and log heat treat loads by job and heat. If any step relies on operator memory, an audit or a customer complaint will expose it. **Bullets:** - Cutting: carry the heat mark to every billet or tag the bundle - Forging: record heat per work order and per split - Heat treat: log which lots share a furnace load - Outside processing: require heat and lot on return paperwork #### Verifying the Mill Cert on Receipt **Body:** A mill test report should match what you ordered. Check the heat number against the material stamped or tagged on the bar, the grade and specification, chemistry against the spec limits, mechanical properties where reported, and the heat treat condition. For forgings ordered to ASTM or AMS specifications, confirm the cert references the right revision. Defense work may bring restrictions on melt origin, such as the specialty metals clause at DFARS 252.225-7009 for certain alloys, which means the cert and supplier records must show where the metal was melted. Hold material in quarantine until the cert is reviewed, not after the bar is already cut. **Bullets:** - Heat number matches bar markings - Chemistry and mechanicals meet the spec limits - Melt origin documented when the contract restricts it - Cert revision and specification match the PO #### Building the Cert Package for the Customer **Body:** The customer package usually includes a certificate of conformance, the mill cert for each heat used, heat treat records, test reports, NDT results and dimensional inspection data. For aerospace customers it may also include a first article report under AS9102. Assemble it from records created during production rather than at the end, because chasing a missing heat treat chart after the parts have shipped is slow and sometimes impossible. A checklist per job, driven from the PO requirements, prevents missing items and shows which documents are still outstanding. #### Retrieval: Answering a Customer Question in Minutes **Body:** The test of your system is a drill: pick a shipped lot and trace it backward to the mill cert and forward to every customer shipment of that heat. If the answer comes from an ERP report in minutes, the process is working. If it requires searching shared folders and paper binders, there is room to improve. A private AI layer over the ERP and the document archive can answer these questions in plain language, such as which jobs consumed heat number X, with citations to work orders and cert files. Keeping it on-premises matters if drawings or certs are export-controlled. **Bullets:** - Backward trace: part to heat to mill cert - Forward trace: heat to all jobs and shipments - Citations to the work order or document for every answer #### When Paper and Discipline Are Enough **Body:** A small shop with a few active heats and a disciplined tag-and-travel system can meet traceability needs without new software. Technology will not fix lax marking or unreviewed certs. Improve the physical process first, then digitize the records, then consider AI retrieval. Skipping the order leads to a clean-looking system with unreliable data underneath. **Cta:** Netray can index your work orders, mill certs and heat treat records so a heat number trace takes minutes, on your own hardware. **Faq:** #### What is heat number traceability in forging? **Answer:** It is the ability to link every finished forging to the heat of metal it was made from and the mill certificate for that heat, along with the processing and test records. Customers use it to investigate material issues and verify compliance. #### Do I need to keep mill certs for every forging? **Answer:** If the order or specification requires material certification, yes, for every heat used. Retention periods are set by the customer contract and your quality system, and aerospace and defense contracts often require long retention. #### What does DFARS 252.225-7009 mean for a forge shop? **Answer:** It restricts the origin of certain specialty metals, including some steels, titanium and nickel alloys, in items delivered to the Department of Defense. A forge shop must buy compliant material and keep cert and supplier records that support the claim. ## Related Slugs - lot-traceability-electronics-manufacturing - spc-integration-erp-quality - itar-compliant-ai-tools-manufacturing - erp-audit-trail-logging-guide ## Search terms forging heat number traceability, mill test report verification, forging material certification, lot traceability forging, DFARS specialty metals forgings, forging cert package --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json