Steelmaking Costs - FAQs | Frequently Asked Questions

Cost Structure & Components

What are the main cost components in steelmaking?

Steelmaking costs comprise three distinct categories: raw material costs (55-65% of total costs) including iron ore or scrap, metallurgical coal/coke, alloys, and fluxes; energy costs (15-20%) covering electricity, natural gas, and fuel oils; and fixed costs (20-30%) encompassing labour, maintenance, depreciation, and overheads. The proportions vary dramatically by production route: integrated BOF mills are 60-65% raw material dependent (predominantly iron ore and metallurgical coal), whilst EAF mills are 70-75% reliant on scrap steel prices.

Energy costs also differ substantially—EAF production consumes 400-500 kWh per tonne of electricity compared to minimal electricity but substantial thermal energy in blast furnace routes. Understanding this cost structure is critical for forecasting steel prices, assessing regional competitiveness, and evaluating technology transitions toward hydrogen-based steelmaking. For further information, see our examples of steelmaking cost models for BOF and EAF route steel.

Steel Production Cost Structure Comparison

🎧 Profit Optimisation: Systematic approaches to production cost reduction, revenue optimisation, and operational improvements are detailed in Podcast Episode 002: Profit Improvement Programmes (20 minutes).

Key Insights: BOF route costs are dominated by raw material inputs (iron ore + coal = 55-65%), making them highly sensitive to commodity price volatility. EAF routes depend heavily on scrap prices (60-70% of costs) and electricity (12-18%), creating different cost dynamics and regional competitive advantages. Carbon costs increasingly favour EAF production in carbon-priced regions, with BOF routes facing structural disadvantages of $128-200/t currently, widening to $160-300/t by 2030 as carbon prices rise. See the detailed BOF cost model and EAF cost model for current prices and cost calculations.

What is the cash cost of producing steel?

Cash costs represent the minimum variable expenses required to produce steel, excluding depreciation, financing costs, corporate overheads, and capital investments. For integrated BOF mills, cash costs typically comprise 55-60% iron ore, 15-20% metallurgical coal and coke, 5-8% alloys and consumables, 8-12% direct energy (electricity, natural gas), and 10-15% direct labour and maintenance.

Total cash costs range $380-650 per tonne depending on raw material prices and regional labour rates. For EAF mills, cash costs are 70-75% scrap, 12-15% electricity, 3-5% electrodes and consumables, and 8-10% labour, totaling $350-550 per tonne. Mills continue operating when prices cover cash costs even if total costs (including depreciation and capital charges) remain unrecovered - this explains why capacity persists during extended downturns, exacerbating oversupply.

How do economies of scale influence steel production costs?

Economies of scale significantly shape steel industry cost structures. Large integrated mills benefit from high throughput - sometimes close to 5 million tonnes / year - which allows fixed costs such as depreciation, administrative overhead, and environmental charges to be spread across more tons of steel. Blast furnaces and basic oxygen furnaces operate most efficiently at high utilisation rates; reduced output often leads to disproportionately higher per-ton costs. High-capacity steel plants also gain negotiating power in purchasing raw materials, enabling more favourable iron ore, coal, and transportation contracts. EAF mini-mills also enjoy scale benefits, though to a lesser degree.

Raw Material Cost Impacts

How do iron ore and coal prices affect steel costs?

Iron ore and metallurgical coal are the dominant items in integrated steelmaking costs, together representing 70-75% of raw material costs and 40-50% of total production costs. A $10 per tonne increase in iron ore prices raises steel production costs by approximately $14-16 per tonne (accounting for 1.4-1.6 tonnes of ore per tonne of steel and yield losses). Similarly, a $20 per tonne increase in coking coal raises costs by $10-12 per tonne (approximately 0.5-0.6 tonnes per tonne of steel).

These sensitivities create extreme volatility: during Q4 2021, when iron ore spiked to $230/tonne and coking coal reached $600/tonne, integrated mill costs exceeded $900/tonne - well above prevailing market prices - forcing Chinese authorities to intervene with export restrictions and production controls. Conversely, when iron ore collapsed to $80/tonne in early 2023, production costs fell below $400/tonne for efficient producers, triggering plant restarts and expansion announcements.

This accounts for the good correlation between raw material prices and steel prices. For current iron ore, coal, and scrap price movements, see our Raw Material Price Trends page.

How do scrap prices affect steel costs?

Scrap steel prices directly determine EAF production economics, representing 70-75% of cash costs. For further information, see SteelOnTheNet EAF cost model. A $50 per tonne increase in scrap prices raises EAF production costs by $35-40 per tonne (accounting for 0.7-0.8 tonnes of scrap per tonne of crude steel and additional yield losses during melting and refining).

Scrap markets exhibit extreme regional price variations: US HMS 1/2 scrap averaged $340-380/tonne in 2024, European E3 grades $320-360/tonne, whilst Turkish importers paid $380-420/tonne CFR for bulk shipments. These regional arbitrages drive substantial international trade flows - approximately 130 million tonnes of scrap trades globally, with Turkey importing 20-25 mt annually, India 8-12 mt, and Bangladesh 5-7 mt.

Scrap prices also demonstrate a strong correlation with finished steel prices, creating a self-reinforcing feedback loop: rising steel prices incentivise scrap collection, increasing supply; falling steel prices reduce scrap generation from demolition and manufacturing, tightening supply and creating a price floor. This dynamic explains why EAF mills typically maintain more stable profitability than integrated operations.

🎧 Yield Loss Economics: How crop losses, scale formation, batch sizing, and furnace atmosphere control drain millions annually from bar mill margins is explored in Podcast Episode 006: Understanding Steel Mill Yield Losses (19 minutes).

Production Costs & Regional Variations

How much does it cost to produce one tonne of steel?

Steel production costs vary enormously by technology route, location, and market conditions. As of Q4 2025, integrated BOF mills in China produce at approximately $450-550 per tonne, European facilities at $600-750 per tonne, and US mills at $550-650 per tonne. Scrap-based EAF mills show narrower regional variation: Chinese producers at $400-500 per tonne, European at $500-600 per tonne, and US at $450-550 per tonne.

These ranges reflect fluctuating raw material prices - when iron ore spikes from $100/tonne to $150/tonne, integrated mill costs increase $50-70 per tonne; when scrap rises $100 per tonne, EAF costs rise $70-80 per tonne. Low-cost producers in resource-rich regions like India and CIS countries can achieve costs below $400 per tonne through captive iron ore mines, whilst high-cost marginal producers in Japan and South Korea regularly exceed $700 per tonne.

Our steel production cost curves track these variations across 250+ production sites globally.

These costs are calculated using our systematic cost benchmarking methodology, which provides transparent frameworks for validating production cost estimates across different technologies and locations.

How much do energy costs contribute to steel production costs?

Energy costs account for 15-20% of total steel production costs, though this proportion varies dramatically by production technology and according to regional electricity prices. Integrated blast furnace-BOF routes consume 19-22 gigajoules per tonne (GJ/t) of thermal energy but only 200-300 kWh/t of electricity - the thermal energy comes primarily from coking coal consumed in coke ovens and blast furnaces.

At $150-200 per tonne coking coal and $60-80 per MWh electricity, energy costs total $90-130 per tonne. Scrap-based EAF mills consume 400-500 kWh/t of electricity, creating extreme sensitivity to power prices: at €40/MWh (typical Spanish off-peak rates), electricity costs €16-20/tonne; at €200/MWh (German peak rates during gas crisis), costs exceed €80-100/tonne.

This explains why EAF mills concentrate in regions with cheap, abundant electricity - Canada, Norway, and Iceland leverage hydroelectric power at $20-30/MWh; Middle East mills access subsidised gas-fired power at $30-40/MWh; whilst European mills facing $100-150/MWh rates struggle with competitiveness. Hydrogen-based DRI production will consume 3,500-4,000 kWh per tonne, making electricity costs 40-50% of total costs.

How do labour costs impact steel production costs?

Labour costs represent 8-15% of total steel production costs, though this varies dramatically by geography and automation levels. Advanced Western mills employing 400-600 workers per million tonnes capacity with average wages of $80,000-120,000 annually face labour costs of $40-60 per tonne. Conversely, Chinese mills operating 1,000-1,500 workers per million tonnes at $15,000-25,000 annual wages achieve labour costs of $20-30 per tonne - partially offset by lower productivity.

Indian mills strike a middle ground at $10-15 per tonne with wages of $8,000-12,000 but manning levels of 800-1,200 per million tonnes. Labour costs create persistent competitive advantages for Asian producers but represent declining importance in total cost structures as automation advances. Labour flexibility during downturns differs substantially - US and European facilities face stringent redundancy costs and union constraints on temporary layoffs, whilst Asian facilities adjust workforces more dynamically, creating operational flexibility during periods of market volatility.

Are freight costs an important component of steel production costs?

Steel is heavy to transport; and freight costs for steelmaking raw materials can also be expensive. Transport costs thus represent a significant component of delivered steel economics, adding 15-30% to ex-works prices for commodity products. This freight cost sensitivity explains why most steel trades within 500km of production.

The steel freight costs burden has driven emergence of micro mills - small-scale EAF facilities producing 100,000-300,000 tonnes annually, strategically located near both scrap sources and end-use markets. Micro mills minimise inbound freight by sourcing local scrap within 100-200km radius (paying $10-20 per tonne freight versus $40-60 for long-distance scrap) whilst eliminating outbound freight premiums through same-day trucking to customers.

Companies like Nucor, Steel Dynamics, and Commercial Metals have deployed micro mills in target markets to achieve delivered cost advantages of $50-100 per tonne versus large mills shipping across much greater distances. For high value products such as stainless steels costing thousands of dollars per tonne, shipping costs represent just a tiny proportion of total cost - these steels can therefore be profitably transported across fairly large distances.

Cost Analysis & Market Economics

What is a steel cost curve?

A steel cost curve plots global steel production capacity arranged in ascending order by production cost per tonne, creating a visual representation of industry cost competitiveness. The horizontal axis shows cumulative capacity in million tonnes, whilst the vertical axis displays cash costs or total costs per tonne. The curve's shape reveals critical market dynamics: a steep curve indicates wide cost variation between efficient and marginal producers, creating significant profit opportunities for low-cost mills when prices exceed marginal costs; a flat curve suggests homogeneous cost structures with minimal competitive advantages. For examples, see SteelOnTheNet's cost curves covering hot rolled coil and hot rolled bar.

Cost curve construction requires accurate demand assessment for each region. Our aggregate steel demand methodology explains the bottom-up approach for calculating regional consumption that underpins cost curve positioning.

Carbon Costs & Environmental Economics

Are CO₂ costs important in steelmaking?

CO₂ costs have emerged as a critical component of steel production economics in regions with carbon pricing mechanisms. The EU Emissions Trading System (ETS) currently prices carbon at €80-90 per tonne CO₂ [as at end-2025], a price that is projected to reach €100-150 by 2030. This creates dramatic cost differentials between production routes.

Integrated BF-BOF steelmaking emits approximately 2.0 tonnes CO₂ per tonne of steel, with coke-making and blast furnace operations generating the majority of these steelmaking CO₂ emissions. This translates to carbon costs of €160-180 per tonne at current prices, or €200-300 per tonne by 2030.

Conversely, scrap-based EAF steelmaking produces only 0.4 tonnes CO₂ per tonne of steel (0.2 tonnes Scope 1 plus 0.2 tonnes Scope 2 from grid electricity), resulting in carbon costs of just €32-36 per tonne currently, or €40-60 per tonne by 2030. This creates a structural cost advantage of €128-144 per tonne favouring EAF producers at current carbon prices, widening to €160-240 per tonne by 2030—equivalent to 25-35% of typical steel selling prices.

The disparity is pushing integrated producers toward carbon capture and storage (CCS) investments, hydrogen-based DRI-EAF transitions, or asset closures. The EU's Carbon Border Adjustment Mechanism (CBAM), which commenced operation in early-2026, extends carbon cost charges to imports. To model carbon cost exposure by process route, see our Steel Production Emissions Calculator.

Why do blast furnaces and coke plants produce so much CO₂?

Blast furnaces and coke plants generate substantial CO₂ emissions because carbon serves dual functions in integrated steelmaking - as both fuel and chemical reductant. In blast furnace ironmaking, carbon from coke and injected pulverised coal (PCI) strips oxygen from iron ore through chemical reduction reactions, producing approximately 1.6-1.8 tonnes CO₂ per tonne of hot metal. This CO₂ stems from the reduction chemistry itself rather than combustion alone.

Even if blast furnaces were heated by renewable electricity, the reduction reaction would still liberate 1.3-1.5 tonnes CO₂ per tonne as carbon bonds with oxygen removed from ore. Coke plants add another 0.3-0.4 tonnes CO₂ per tonne of steel by heating metallurgical coal to 1,000-1,100°C in oxygen-free ovens. Combined, integrated BF-BOF steelmaking emits 1.9-2.3 tonnes CO₂ per tonne of crude steel.

These emissions are process-inherent rather than efficiency-related, explaining why incremental improvements achieve only 10-15% reductions. Fundamental decarbonisation requires replacing carbon-based reduction entirely - either through hydrogen-based DRI (where H₂ strips oxygen, producing H₂O instead of CO₂) or carbon capture and storage (CCS).