A steel distributor purchases a full heat of SA-516-70 plate — 40,000 lbs, one MTC, one heat number. Over the next two weeks, three separate customer orders absorb pieces of that heat. The receiving team files the MTC in the heat folder. Everyone moves on.
Six months later, Customer B needs to submit a cert package to their customer for a pressure vessel they built. Customer C calls the week after for the same reason. Neither has the cert. The distributor's inside sales rep searches the shared drive. The MTC is under the original receipt document number — the one tied to Customer A's order, because that's who happened to be on the release when material arrived.
Three days of searching, two escalations to the warehouse supervisor, and one call to the mill for a cert reissue. This is the partial heat cert split problem, and it happens every week at distributors that don't have a formal cert relay process.
Why Partial Heat Splits Break Cert Management
The root issue is that cert filing systems are built around receipts, not sales orders. When material arrives, the MTC gets attached to the receiving document. That document has one PO number, one receipt number, and implicitly links to whoever placed the first order off that heat.
When you split a heat across three orders, you have three shipments but one cert. The cert doesn't automatically replicate to the other two order records. If your filing system is folder-based — whether physical or digital — the cert lives in one place, indexed by one order, and the other two customers have no visible link to it.
The problem compounds when:
- Orders ship weeks apart. The material sits in the warehouse while orders trickle in. The cert gets filed at receipt, not at shipment. By the time Customer B ships, the receiving document from four weeks ago is in a closed-receipts folder.
- Different people handle each release. The inside sales rep who knows about the partial heat arrangement is not always the one who handles the follow-up inquiry from Customer B.
- The mill cert is a single-page scan. There's no data record tying heat number to each sales order — just a PDF in a folder.
What a Cert Relay Process Looks Like
A cert relay process means every order that draws from a heat gets its own copy of the cert — attached to that order's documentation package at the time of release, not after the fact.
The mechanics are straightforward:
Step 1: Cert copied at first release. When the first portion of a heat ships against Customer A's order, a copy of the MTC is attached to that shipment record. Not the original receipt document — the shipment record for Customer A.
Step 2: Cert flagged as shared-heat at receiving. When the MTC is logged at receiving, the operator marks the receipt as a partial-heat receipt. This flag tells the system (or the next operator) that this heat may ship to multiple customers and the cert needs to follow each release.
Step 3: Subsequent releases trigger cert attachment. When Customer B's order pulls from the same heat, the cert is pulled from the heat record and attached to Customer B's shipment record. Customer C gets the same treatment.
Each customer now has the cert in their order record, not buried in a receiving document from months ago.
The Minimum Version (No New Software Required)
If you're not ready to implement a digital cert management system, you can run a manual version of this process:
- At receiving, print three copies of every MTC for any heat that has a known multi-order split.
- File one copy in the heat folder (receiving archive). Give the others to the sales coordinator handling the associated orders.
- When each order ships, the sales coordinator attaches the cert copy to the packing list and the digital shipment record.
This requires discipline and coordination between receiving and sales. It breaks down when orders aren't known at the time of receipt — which is common when material is bought speculatively for stock.
The stronger version: a cert database where every heat number links to every sales order that drew from it, with the cert document accessible from any of those records.
What Customers Actually Experience
The cert chase costs the customer time. More importantly, it signals that your documentation process is loose. For customers in pressure vessel fabrication, structural fab, or any regulated industry, a distributor who can't produce the cert quickly raises a quality flag — even if the material itself is perfectly fine.
A cert relay process is not a complex project. It's a procedure change that takes two to three weeks to train and deploy. The payoff is every customer gets their cert at shipment, not when they call for it three months later.