What carbon figure should a foundry use for pig iron bought from an integrated steel plant?
Ask the plant for direct emissions per tonne of pig iron from its blast furnace balance, including coke and sinter, for the year. Pig iron under CN 7201 is a CBAM good, so plants exporting to the EU already work this out. For a domestic foundry it is Scope 3, Category 1, purchased goods.
Where the figure comes from
Pig iron carries most of a blast furnace plant's emissions: coke making, sintering and the furnace itself. The plant can give a per tonne figure from its mass balance.
If you export castings
Cast articles under CN 7325 are outside CBAM, while other iron and steel articles under 7326 are in scope. Either way some buyers ask for a product figure, and the pig iron figure is the largest input.
Records
Purchase invoices with tonnes and grade, and the plant's figure with its year.
What Senseible does here
Senseible reads coal, coke, gas, electricity and freight invoices into a dated, fingerprinted record per site, so each figure in a CBAM or buyer response can be traced back to the documents behind it.
Sources: CBAM Regulation (EU) 2023/956, consolidated, worldsteel, CO2 data collection methodology (worldsteel.org), GHG Protocol Corporate Value Chain (Scope 3) Standard
Last reviewed 2026-10-21.