A mold drawing is not a metal specification
Most buyers who request aluminum sow molds start with what they already have: a sow or ingot drawing. That drawing describes the cavity the plant needs—capacity, profile, fork pockets, runners, and dimensional tolerances. It is necessary. It is not sufficient.
The mold itself is a steel casting that will sit under repeated thermal shock, molten aluminum contact, and cleaning cycles for thousands of pours. The steel’s chemistry, related heat treatment, and microstructure (when known) determine how that mold behaves under your duty—not under a generic catalog assumption.
Roughly 99% of buyers who come to quote lack clear sow-mold metal specs. They have the aluminum sow print. They often do not have a written mold-metal requirement tied to casts per day, cooling method, washout history, or alloy class. That gap is where wrong chemistry, short mold life, and production frustration begin.
FerroTech Castings LLC (FerroTech / FTC) coordinates manufacturing of sow molds and drain pans for the worldwide aluminum industry. We win on technical expertise, quality, and on-time shipment—not on the idea that “a mold is a mold.”
Why chemistry gets treated as proprietary
In this market, mold chemistry is often held close. Some suppliers treat formulation as proprietary and lean on a practical fear: if you leave, you risk downtime while you re-qualify another source. The buyer may never see a clean, portable metal specification that another competent supplier could manufacture to.
That lock-in is convenient for the seller. It is expensive for the plant when molds wash out early, crack, or force unplanned changeouts.
FTC’s approach is the opposite of locking you in with opacity. We help customers define clean mold-metal specs from their process before quote and before ship—so purchasing and process engineering share one document that describes function, not folklore.
We do not invent competitor formulas, and we do not claim secret proprietary chem numbers we do not have. We work from your process needs, duty history, and any chemistry or microstructure data you already hold—or we help you assemble enough of that picture to quote correctly.
Wrong chemistry shows up as washout and short mold life
When standard alloy is ordered for a mid-alloy duty—or when chemistry is guessed from a sow drawing alone—plants typically see:
- Accelerated washout in high-contact zones
- Shorter usable life measured in pours, not in vague “months on the floor”
- More frequent mold swaps and inventory churn
- Frustration between purchasing (who bought to a drawing) and process (who runs the cycle)
That pattern is common enough to name without naming names: plants that ordered standard when mid alloy was needed for their cast rate, cooling, and washout history. The drawing looked right. The metal did not match the duty.
Duty cycle is part of the specification. Operating patterns are not interchangeable. Casting molten aluminum a few times per day is not the same as a carousel running many cycles, a low weekly cast rate, or near-continuous 24/7 pouring. Chemistry and related heat treatment should be set for heat transfer, strength, and ductility required by that application—not for a one-size catalog steel.
What “clean mold-metal specs” means in practice
Before quote, FTC aims to capture enough process truth to avoid shipping the wrong class of mold:
| Capture before quote | Why it matters |
|---|---|
| Standard vs mid alloy (and higher duty bands when applicable) | Matches metal class to cast intensity |
| Duty / washout history | Past failure modes predict what the next mold must survive |
| Chemistry / microstructure when available | Anchors the spec in measured metal, not assumption |
| Process needs (cooling, cycle rate, application) | Ties heat treatment and function to real operation |
| Sow / mold size family (e.g. LP1500, LP2000, LP1850) | Aligns geometry with the metal class you actually need |
You may not have every row filled on day one. That is normal. The point is to stop quoting from the aluminum sow print alone.
A wide range of chemical specifications and related heat treatments is available. FerroTech delivers a full engineering drawing to the client with customer specifications and the required heat treatment. Work is quoted and delivered against that drawing, the specification, and the purchase order—production through customer delivery, with export, import, and shipment details included in the quote when that is the commercial path.
Technical expertise, not commodity steel
Positioning for FerroTech is straightforward:
- Technical expertise — help define the mold-metal requirement from process, not from habit.
- Quality — manufacture and inspect to the agreed drawing and chemistry class.
- On-time shipment — coordinated manufacturing through delivery so the plant can plan changeouts.
We do not claim to operate a company-owned foundry. We coordinate manufacturing. We do not claim unique magic alloys. We do claim that matching chemistry and duty cycle is the professional way to buy sow molds—and that hiding chemistry behind proprietary walls serves the supplier’s lock-in more than the buyer’s uptime.
If you only have a sow drawing today, start there. Then add casts per day (or per week), cooling method, washout notes, and whether prior molds were standard or mid alloy. That short list usually separates a durable quote from an expensive guess.
Next steps
When you are ready to move from drawing-only to process-based quoting:
- Review ready-stock options on Inventory
- Start an Online DRAFT Quote with size, duty, and alloy-class inputs
Bring what you know. We will help you tighten the mold-metal side before anything ships.
Related pages
- Home — FerroTech Castings overview
- Deliverables — what ships with the order
- Inventory — ready-to-ship molds
- Online DRAFT Quote — draft estimate from process inputs