Electric Arc Furnace vs Basic Oxygen Furnace: How Steel Is Made in 2026
Understanding how steel is produced directly affects the quality, cost, and environmental footprint of the products you buy. In 2026, two dominant production routes exist: the Basic Oxygen Furnace (BOF) and the Electric Arc Furnace (EAF).
1. The Basic Oxygen Furnace (BOF) Process
- Raw material: Iron ore processed in blast furnace to molten pig iron
- Process: Pig iron + scrap (10-30%) charged into converter, oxygen blown to oxidize impurities
- Temperature: ~1650°C
- Batch size: 200-400 tons
BOF accounts for approximately 70% of global steel production.
2. The Electric Arc Furnace (EAF) Process
- Raw material: Primarily scrap steel (80-100%), plus DRI or HBI
- Process: Graphite electrodes create electric arcs to melt scrap
- Temperature: ~1800°C at arc zone
- Batch size: 50-200 tons
3. Quality Comparison
| Factor | BOF | EAF |
|---|---|---|
| Residual Elements | Very low (virgin ore) | Higher (scrap) |
| Nitrogen | 30-60 ppm | 50-100 ppm |
| Consistency | Very consistent | Good, batch variation |
4. Environmental Impact
EAF produces approximately 75% less CO2 per ton:
- BOF: ~1.8-2.2 tons CO2 per ton of steel
- EAF: ~0.4-0.6 tons CO2 per ton of steel
5. What This Means for Buyers
- For structural: Both routes are equivalent
- For surface-critical: BOF may have an edge
- For green certification: EAF provides better credentials
CoreMetal works with both BOF and EAF mills. Contact Tracy: tracy@coremetalsteel.com | +86 18291910632