Salzgitter Low CO2 Steelmaking (SALCOS)

Germany · DE-NI Lower Saxony

Overview

StatusConcept

Country · regionGermany · DE-NI Lower Saxony

TechnologyWater electrolysis

Capacity100 MW (ordered electrolyzer capacity for SALCOS first stage)

Capacity values retain their recorded units and scope. MW, kt H₂/y and Nm³ H₂/h are different measures; this page does not convert or add them without a shared operating basis.

Details

Technology & product

ComponentsElectrolyser (Alkaline)

Project GroupSALCOS® (first stage)

Project Typehydrogen production facility

Capacity & economics

Total Capex2.7 billion euros; Scope: SALCOS first stage

Status & timeline

EventFinal investment decision (FID)

Location & names

Site NameSalzgitter Flachstahl GmbH site

AliasSalzgitter Low CO2 Steelmaking (SALCOS)

Official NameSALCOS® - Salzgitter Low CO2 Steelmaking

Additional project information

Capacity (MW)100 MW

Timeline

EPC contract awarded : 2023-09-20

Sources & record history

Sources

European Hydrogen Observatory projects Dec2025 Shared by 4 fields: Snapshot 2025-12-01 · Confidence: reported · Older value (2025)
Salzgitter AG Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html)
Salzgitter AG Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf)
Salzgitter AG Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html)
H2Prism earlier record (SRC-C-P200)
Salzgitter AG Salzgitter orders one of Europe's largest green hydrogen plants from ANDRITZ

Field sources

Shared date, confidence and value status appear once with their source above; a dash in the table refers to that source context.

Field	Shown value	Original value	Source	Date basis	Meaning
Name	Salzgitter Low CO2 Steelmaking (SALCOS)	View exact value `Salzgitter Low CO2 Steelmaking (SALCOS)`	European Hydrogen Observatory projects Dec2025	—	—
Site Name	Salzgitter Flachstahl GmbH site	View exact value `Salzgitter Flachstahl GmbH site`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Administrative Area	DE-NI Lower Saxony	View exact value `DE-NI Lower Saxony`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Alias	Salzgitter Low CO2 Steelmaking (SALCOS)	View exact value `[{"kind":"source_label","name":"Salzgitter Low CO2 Steelmaking (SALCOS)"}]`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Country	Germany	View exact value `DEU`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Official Name	SALCOS® - Salzgitter Low CO2 Steelmaking	View exact value `[{"lang":"en","name":"SALCOS® - Salzgitter Low CO2 Steelmaking","evidence":["E-01"]}]`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Components	Electrolyser (Alkaline)	View exact value `{"kind":"전해조","tech":"알칼라인","tech_raw":"pressurized alkaline electrolyzer technology","component_id":"CMP-1"}`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Project Group	SALCOS® (first stage)	View exact value `{"exists":true,"evidence":["E-02","E-05"],"group_name":"SALCOS®","phase_name":"first stage","phase_order":1}`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Project Type	hydrogen production facility	View exact value `hydrogen_production_facility`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); Salzgitter AG (https://www.salzgitter-ag.com/fileadmin/finanzberichte/2026/3m/en/downloads/szag-3m-2026-en.pdf); Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Technology	Water electrolysis	View exact value `Water electrolysis`	European Hydrogen Observatory projects Dec2025	—	—
Capacity	100 MW (ordered electrolyzer capacity for SALCOS first stage)	View exact value `100 MW (ordered electrolyzer capacity for SALCOS first stage)`	Salzgitter orders one of Europe's largest green hydrogen plants from ANDRITZ		Current
Total Capex	2.7 billion euros; Scope: SALCOS first stage	View exact value `{"unit":"billion euros","scope":"SALCOS first stage","number":2.7,"raw_text":"total investment volume of 2.7 billion euros"}`	Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Event	Final investment decision (FID)	View exact value `{"date":null,"tags":{"as_of":"2026-08-18","source":"SALCOS programme page","evidence":["E-05"],"judged_by":"worker_review","confidence":"high","accessed_at":"2026-08-18T00:00:00Z"},"ev_type":"EV-05","event_id":"V-01","raw_date_text":"The final investment decision for the first stage of SALCOS® has been made","date_precision":"unknown"}`	Salzgitter AG (https://salcos.salzgitter-ag.com/en/index.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Event	EPC contract awarded : 2023-09-20	View exact value `{"date":"2023-09-20","tags":{"as_of":"2023-09-20","source":"Salzgitter AG press release","evidence":["E-01"],"judged_by":"transcription","confidence":"high","accessed_at":"2026-08-18T00:00:00Z"},"ev_type":"EV-09","event_id":"V-02","raw_date_text":"Salzgitter AG has ordered a 100 MW green hydrogen plant for low-CO2 steel production from ANDRITZ GROUP.","date_precision":"day"}`	Salzgitter AG (https://www.salzgitter-ag.com/en/newsroom/press-releases/details/salzgitter-ag-ordert-eine-der-groessten-anlagen-europas-zur-produktion-von-gruenem-wasserstoff-von-andritz-21046.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200)		Older value
Progress Status	Concept	View exact value `announced_or_planned`	European Hydrogen Observatory projects Dec2025	—	—
Capacity (MW)	100 MW	View exact value `100 MW`	European Hydrogen Observatory projects Dec2025	—	—

Record history

1 current sourced value · 13 older values · Record updated 6 Oct 2026