Ferroalloys are often discussed as one market. They are not. FeSi, FeMn, SiMn and FeCr have different cost structures, different producing regions and different demand drivers, and they can move in opposite directions in the same quarter. Understanding which input dominates each one is most of the work.
The four inputs
Electricity. Every ferroalloy is made in a submerged arc furnace, so power is a major cost everywhere. But its share varies sharply. Silicon-based alloys are the most power-hungry per tonne, which makes FeSi the most sensitive to tariff changes and hydrology. Chrome and manganese alloys carry a heavier ore burden by comparison.
Ore and reductants. FeCr follows chrome ore. FeMn and SiMn follow manganese ore. When ore moves, those alloys move with a lag set by how much stock sits in the chain. FeSi has no equivalent: quartzite is widely available and rarely the swing factor.
Freight and logistics. Ferroalloys are dense, low-value-per-tonne cargoes relative to their bulk. Freight is a real share of the landed cost, which means route disruption, container availability and bulk rates show up in delivered prices even when producer prices have not moved.
Policy. Export duties, quotas, licensing regimes and sanctions change which origins can economically reach which market. A duty announcement repriceses a market in days, long before any physical flow changes.
Producer cost sets the floor. Policy and freight set which floor a given buyer is actually standing on.
Why the alloys decouple
| ALLOY | DOMINANT COST | DEMAND PULL | TYPICAL BEHAVIOUR |
|---|---|---|---|
| FeSi | Electricity | Crude steel, cast iron | Moves on power policy and hydrology as much as on steel |
| FeMn | Manganese ore | Carbon steel volume | Tracks ore with a lag |
| SiMn | Ore plus power | Long products, rebar | Sits between FeSi and FeMn, sensitive to construction |
| FeCr | Chrome ore, power | Stainless steel | Follows stainless output and chrome ore, largely its own cycle |
A buyer whose basket spans several of these should not expect one hedge or one negotiating stance to cover them. SiMn demand can be strong on construction while FeCr is weak on stainless destocking, and both can be true in the same month.
The demand side is lumpier than it looks
Alloy consumption is a function of steel output, but not a smooth one.
- Grade mix matters more than tonnage. A mill shifting from commodity rebar to higher-alloy product changes its ferroalloy basket materially at constant crude steel tonnage.
- Mills buy in campaigns. Consumption is continuous; purchasing is not. Restocking cycles amplify price moves in both directions.
- Foundries behave differently from mills. Inoculant demand follows casting activity, especially automotive and industrial, and is less correlated with crude steel than people assume.
Reading a quote properly
Two quotes for the same grade are frequently not comparable. Before treating a number as cheap, confirm:
- The Incoterm. An EXW number and a CIF number are different products. Freight, insurance and port costs sit between them.
- What the specification actually guarantees. A tight aluminium maximum costs money. A quote without one is quoting something else.
- The sizing, and the fines allowance. As above, this is where delivered value is won or lost.
- Payment terms and who carries the risk. Terms are priced, whether or not they are itemised.
- Lot size and whether the price survives at your volume.
A practical stance
For a buyer with recurring requirements, three habits do more than market-timing:
- Split term and spot deliberately rather than by accident, so a bad month on spot does not stop a line
- Qualify a second producer for your main grade before you need one, because qualification takes longer than any shortage lasts
- Track the input that dominates your alloy, not a general ferroalloy index. For FeSi that is power. For FeCr it is chrome ore.
Prices in this market are not quoted off a screen the way base metals are. They are negotiated against a cost stack. Knowing which part of the stack is moving is what makes a negotiation go well.