Steelmakers are entering the second half under pressure as input costs rise faster than selling prices, widening the gap between what mills pay for raw materials and what they can charge for finished steel.
Steelmakers Face Higher Coal Costs, Lower Coil Prices
The sharpest change came in coking coal, which jumped to about $278 a ton in September from $235 in August, an 18.3% increase that lifted estimated hot-metal production costs for Korean blast furnaces to around $352 a ton from roughly $321. At the same time, domestic 3mm hot-rolled coil distribution prices fell to about 935,000 won a ton from 955,000 won, reversing a flat trend in July and August.
That combination is economically important because steel is a margin business with limited short-term pricing power. When raw material inflation accelerates and finished-product prices soften, mills struggle to pass through costs, compressing gross margins and weakening cash generation. The pressure matters not just for Korean producers such as Posco and Hyundai Steel, but also for global peers exposed to benchmark steel pricing and volatile seaborne raw materials.
A stronger won offered only partial relief. The average won-dollar exchange rate fell to about 1,359 in September from 1,406.3 in August and 1,497.4 in July, cushioning the dollar-based cost of imported inputs. Even so, the currency move was not enough to offset the surge in coking coal, and the won-denominated estimate of hot-metal cost still rose to about 478,000 won a ton from 452,000 won in August.
The mismatch underscores why steel investors are focused on spreads rather than headline commodity moves. For integrated mills, profitability depends on the spread between steel prices and raw material costs, and that spread deteriorated in September. Posco said recent distribution prices have been trending lower even as coking coal costs climbed after Middle East tensions. Hyundai Steel pointed to structural downward pressure on hot-rolled prices even as ore and coal markets remain driven by global supply and demand.
There is some debate over how directly these estimates translate into reported earnings. Actual costs depend on inventory timing, procurement contracts and hedging, while realized selling prices vary by product mix and customer agreements. Bulls will argue that any lag in raw material pass-through can reverse if steel demand stabilizes and mills push through price hikes. Bears will note that weaker construction and manufacturing demand leave producers with little leverage, especially if coal stays elevated.
For investors, the immediate implication is that fourth-quarter earnings risk is rising for steelmakers with high exposure to spot pricing and blast-furnace feedstock. Shares of U.S. peers such as Nucor, Steel Dynamics and Cleveland-Cliffs have already shown how sensitive the sector is to margin expectations, with recent price action reflecting shifting views on steel spreads rather than outright demand alone. If hot-rolled prices keep falling while coking coal stays firm, the sector’s “emergency” margin pressure could persist into year-end.
| Entity | Gains | Losses |
|---|---|---|
| Coking coal producers | ▲Higher realized prices | ▼Steelmakers’ margins |
| Steelmakers using blast furnaces | ▲Stronger won helps costs | ▼Coal inflation and HRC weakness |
| Buyers of hot-rolled coil | ▲Lower input prices | ▼Steel mills’ pricing power |
| Steel investors | ▲Potential value in cost leaders | ▼Holdings exposed to spread compression |
