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Sustainability · Green steel

Green steel for lower-carbon steel structures

World Steel fabricates structural steel from mills with verified carbon data – EAF and low-carbon sections and plate, ResponsibleSteel-certified sites, products with EPDs – and documents the embodied carbon of your steel package for LEED, Green Star, Green Mark, Buy Clean and CBAM.

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1.92 t
CO2 per t crude steel
world average 2024 · worldsteel
0.69 t
Scrap-EAF route
vs 2.34 t for blast furnace
44
ResponsibleSteel certificates
listed below with sources
1,080 kg
Buy Clean California limit
CO2e/t fabricated sections
Hot-rolled steel sections

What green steel means for a steel structure

Almost all of the embodied carbon of a steel structure comes from making the steel, not from fabricating it. “Green steel” therefore means steel from a production route with a lower, verified carbon footprint – mainly electric-arc-furnace (EAF) steel made from scrap, and in future hydrogen-based direct reduced iron – documented in an Environmental Product Declaration (EPD) or a recognised certification.

World Steel does not make steel; we buy plate, sections and hollow sections and turn them into certified structures. That makes the mill choice the biggest carbon lever we control for you: we propose mills and products with the data your rating tool or authority accepts, keep heat-number traceability from the mill certificate to every piece, and add the fabrication, coating and transport data to give a complete carbon statement for the steel package.

Green steel products

Lower-carbon options for every part of the structure

Available per project from mills with verified data – the choice depends on the market, section range, programme and budget.

Primary frame

EAF hot-rolled sections

Wide-flange, UB / UC, HEA / HEB and channels from scrap-based EAF mills with product EPDs – typically a fraction of the blast-furnace footprint.

詳細と表 →
Built-up members

Low-carbon plate

Plate for welded sections, base plates and connections from EAF or certified mills, with EPD or ISO 14067 data.

詳細と表 →
Columns, trusses

Hollow sections

HSS / CHS / RHS from coil or plate of mills with verified data – checked against GWP limits such as Buy Clean California.

詳細と表 →

World Steel structures

How our steel structures meet green-material requirements

01

Mill data first

Sections and plate from mills with EPDs, ISO 14067 footprints or ResponsibleSteel certification when the project requires it.

02

Traceable to every piece

Heat numbers link each member to its mill certificate and carbon data – the basis of an honest carbon statement.

03

Less steel, less carbon

Tapered and built-up members, optimised connections and value engineering reduce tonnage before any green premium is paid.

04

High recycled content

EAF sections are made mainly from scrap, and every World Steel structure is 100 % recyclable at the end of its life.

05

Designed to last

Coating systems chosen for the corrosivity category and design life – no early repainting or replacement.

06

Bolted and reusable

Bolted connections allow frames to be dismantled, moved and reused – the lowest-carbon steel of all.

規格とコンプライアンス

Green-material requirements by market

What rating tools and authorities typically ask for steel – confirm the version and credit in your project.

Australia

  • Green Star BuildingsResponsible products – ResponsibleSteel sites, EPDs; Upfront Carbon credit
  • EPD AustralasiaEN 15804+A2 EPDs for steel products
Typical ask
ResponsibleSteel site + product EPD
Australia & New Zealandの規格一覧 →

United States

  • LEED v4.1 MRBuilding product disclosure – EPDs and embodied-carbon optimisation
  • Buy Clean CaliforniaMaximum GWP per steel product (facility-specific EPD)
  • ISO 21930 EPDsSteel EPDs to the North American PCR
Fabricated sections
≤ 1,080 kg CO2e/t (Buy Clean CA)
United Statesの規格一覧 →

Europe

  • EN 15804+A2EPDs for construction products
  • EU CBAMEmbedded emissions of imported steel goods, incl. CN 7308
  • BREEAM · LESSLCA credits for EPDs · German low-emission steel label
Imports
CBAM declaration from 2026
Europeの規格一覧 →

Asia

  • BCA Green Mark 2021Singapore – whole-life carbon section
  • CASBEEJapan – life-cycle CO2 rating
  • Vietnam ETSPilot carbon allowances for iron and steel plants (Decree 06/2022, amended 2025)
Typical ask
EPD or ISO 14067 data per product

参考用の概要です――プロジェクト仕様書、採用される基準の版、所轄官庁の判断が優先されます。

Carbon documentation

What we provide with a green steel package

Prepared per project from the mill data of the steel actually supplied.

Mill EPDs & footprints

EN 15804 · ISO 21930 · ISO 14067

Product EPDs or verified carbon footprints for the sections and plate used.

Traceability record

heat number → piece mark

Mill certificates linked to every assembly in the model.

Carbon statement

A1–A3 + fabrication

Tonnage-weighted embodied carbon of the steel package, with the basis of each figure.

CBAM data

EU imports

Embedded-emissions data from the mills for your CBAM declaration.

Steelmaking routes

From 2.34 t to near zero

The route decides the footprint. In 2024 the blast furnace – basic oxygen route averaged 2.34 t CO2 per tonne of crude steel, gas-based DRI-EAF 1.47 t and scrap-based EAF 0.69 t; the world average was 1.92 t (worldsteel). The IEA defines near-zero emission steel as 50–400 kg CO2e per tonne, depending on the scrap share.

Product EPDs show the same spread: EAF hot-rolled sections have published cradle-to-gate values of roughly 300–750 kg CO2e/t, while blast-furnace hot-rolled coil is typically above 2,000 kg CO2e/t. That is why the mill and route are specified first.

Bar chart of CO2 intensity by steelmaking route
Steel stockyard

Physical or certificate?

Know what a green steel claim is based on

Physically lower-carbon steel – EAF, scrap-based or hydrogen-based – has a lower footprint in its own EPD. It counts in building life-cycle assessments and against GWP limits such as Buy Clean California, which require facility-specific EPDs.

Mass-balance certificates allocate a steelmaker’s company-wide emission reductions to selected products. They are verified (by DNV, ClassNK or TÜV, for example) and support a buyer’s Scope 3 reporting, but worldsteel’s own guidelines keep them outside the product carbon footprint and several NGOs criticise them as misleading.

World Steel states the basis of every claim in its proposal, so your consultant can count it correctly.

Certifications explained

Green steel certifications and standards

The schemes that prove a steel’s carbon performance – and what each one actually certifies.

Green steel certifications and standards
SchemeOwnerWhat it provesSource
ResponsibleSteelResponsibleSteelSite certification against 13 principles (GHG, sourcing, labour, environment); "Certified Steel" with decarbonisation Progress Levels 1–4source
EPD – ISO 14025 · EN 15804+A2 · ISO 21930Programme operators (EPD International, IBU, EPD Australasia, UL, SuMPO…)Third-party verified life-cycle data per product – GWP in kg CO2e per tonne (A1–A3 cradle-to-gate)source
ISO 14067ISOVerified carbon footprint of a productsource
ISO 14064-1ISOVerified greenhouse-gas inventory of a site or companysource
ISO 20915 · ISO 14404ISO / worldsteelLife-cycle inventory and site CO2-intensity methods for steelsource
Steel Climate StandardGlobal Steel Climate CouncilCertifies lower-carbon flat and long products against a declining t CO2e/t benchmark; offsets excludedsource
Near-zero emission steelIEA50–400 kg CO2e per tonne of crude steel depending on scrap sharesource
LESS – Low Emission Steel StandardWV Stahl (Germany)Label classes A–E and "Near Zero" based on product carbon footprint and scrap sharesource
SteelZeroClimate GroupBuyer commitment: 50 % lower-emission steel by 2030, 100 % net-zero steel by 2050source
Buy Clean CaliforniaCalifornia DGSMaximum GWP for public works: fabricated hot-rolled sections 1,080 · HSS 1,830 · plate 1,590 kg CO2e/t (facility-specific EPD)source
EU CBAMEuropean CommissionEmbedded emissions of imported iron and steel goods (incl. CN 7308 structures) reported and priced from 2026source
worldsteel Chain of Custody guidelinesWorld Steel AssociationRules for mass-balance reduction certificates – kept outside the product carbon footprintsource

Summary for orientation – check the current version of each scheme and the requirement of your rating tool or authority.

Mill directory

Steel mills with green-steel credentials

Sourced from certification registers and mill publications, October 2026. Use the tabs: ResponsibleSteel sites, low-carbon products, Vietnamese mills.

ResponsibleSteel certified sites (44 certificates)
SiteCompanyCountryCertifiedCertificate
BlueScope ASP Manufacturing Cluster (Port Kembla etc.)BlueScopeAustralia2022-02-01Core site certification
voestalpine LinzvoestalpineAustria2021-10-07Core site certification
ArcelorMittal BelgiumArcelorMittalBelgium2021-07-19Core site certification
Aperam Stainless Europe, Belgium and FranceAperamBelgium/France2021-09-20Core site certification
Aperam Inox América do Sul S/AAperamBrazil2023-01-16Core site certification
ArcelorMittal Brasil MonlevadeArcelorMittalBrazil2022-12-20Core site certification
ArcelorMittal Brasil S.A. PecémArcelorMittalBrazil2026-04-28Core site certification
ArcelorMittal Brasil S.A., Sul FluminenseArcelorMittalBrazil2024-10-30Core site certification
ArcelorMittal Juiz de ForaArcelorMittalBrazil2024-10-30Core site certification
ArcelorMittal PiracicabaArcelorMittalBrazil2024-10-30Core site certification
ArcelorMittal Sabará and São PauloArcelorMittalBrazil2024-10-30Core site certification
ArcelorMittal TubarãoArcelorMittalBrazil2025-06-07Core site certification
ArcelorMittal VegaArcelorMittalBrazil2026-03-10Core site certification
ArcelorMittal Dofasco G.P.ArcelorMittalCanada2024-01-11Core site certification
Outokumpu Business Line Stainless EuropeOutokumpuEurope2024-03-15Core site certification
Outokumpu Business Line Advanced MaterialsOutokumpuEurope2024-03-15Core site certification
ArcelorMittal Construction FranceArcelorMittalFrance2024-10-04Core site certification
ArcelorMittal France, Cluster NorthArcelorMittalFrance2022-05-12Core site certification
ArcelorMittal MéditerranéeArcelorMittalFrance2022-05-02Core site certification
IndusteelIndusteelFrance/Belgium2023-11-17Core site certification
ArcelorMittal Bremen GmbHArcelorMittalGermany2024-07-19Core site certification
ArcelorMittal DuisburgArcelorMittalGermany2024-03-25Core site certification
ArcelorMittal Eisenhüttenstadt GmbHArcelorMittalGermany2021-07-19Core site certification
ArcelorMittal Hamburg GmbHArcelorMittalGermany2026-01-20Core site certification
thyssenkrupp Steel Europe AGthyssenkrupp SteelGermany2025-06-06Core site certification
JSW Steel Coated Products Ltd, TarapurJSW SteelIndia2025-02-18Core site certification
JSW Steel DolviJSW SteelIndia2025-02-18Core site certification
JSW Steel SalemJSW SteelIndia2025-02-18Core site certification
JSW Steel Vijayanagar WorksJSW SteelIndia2025-02-18Core site certification
Tata Steel JamshedpurTata SteelIndia2022-10-28Core site certification
Tata Steel KalinganagarTata SteelIndia2024-01-15Core site certification
Tata Steel MeramandaliTata SteelIndia2023-12-19Core site certification
Acciai Speciali TerniAcciai Speciali TerniItaly2024-04-29Core site certification
ArcelorMittal Belval & Differdange S.A.ArcelorMittalLuxembourg2021-07-19Core site certification
ArcelorMittal Warszawa Sp. z o.o.ArcelorMittalPoland2023-02-24Core site certification
SIJ – Slovenska Industrija JeklaSIJSlovenia2024-03-27Core site certification
ArcelorMittal España S.A.ArcelorMittalSpain2022-05-13Core site certification
ArcelorMittal SestaoArcelorMittalSpain2025-10-03Core site certification
ArcelorMittal Tailored Blanks Zaragoza S.L.ArcelorMittalSpain2023-07-05Core site certification
Borçelik Çelik Sanayii Ticaret A.Ş. (Gemlik)BorçelikTürkiye2023-07-24Core site certification
Emirates Steel Industries Co. PJSC (EMSTEEL)EMSTEELUAE2025-06-13Core site certification
Big River Steel (Arkansas)U.S. SteelUSA2022-04-04Core site certification
Big River Steel (Arkansas)U.S. SteelUSA2024-08-09Certified Steel · Progress Level 1
NS BlueScope Vietnam (Phu My, Ba Ria-Vung Tau)BlueScope / NS BlueScopeVietnam2024-02-26Core site certification

From the ResponsibleSteel register of issued certificates, published 6 Oct 2026. Certificates have expiry dates and re-audits – confirm the current status on responsiblesteel.org before specifying.

プロセス

Delivering green steel on your project

  1. 1

    Target

    Rating credit, GWP limit or buyer commitment.

  2. 2

    Mill options

    Routes, EPDs and certificates per product.

  3. 3

    Optimise

    Reduce tonnage in design and detailing.

  4. 4

    Procure

    Mill orders with carbon data and traceability.

  5. 5

    Fabricate

    Certified fabrication, heat numbers tracked.

  6. 6

    Document

    Carbon statement and EPDs at handover.

引渡条件 · Incoterms® 2020

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Incoterms® 2020を比較 →

FAQ

よくある質問

Does World Steel produce green steel?

No – World Steel is a fabricator. We source plate, sections and hollow sections from mills with verified low-carbon data and certifications, fabricate them under our certified quality systems and document the carbon of the steel package.

Which green steel can we get for a structural steel project?

Most often EAF hot-rolled sections and plate with product EPDs, steel from ResponsibleSteel-certified sites, and coated sheet with EPDs for the envelope. Availability depends on the section range, the market and the programme – we propose options with each quotation.

What is the difference between an EPD and a green steel certificate?

An EPD is verified life-cycle data for a product – its real footprint. A mass-balance certificate allocates a steelmaker’s company-wide reductions to a product and does not change its EPD value. Rating tools and Buy Clean limits use EPDs.

Is ResponsibleSteel certification the same as low-carbon steel?

Not by itself. Core site certification covers responsible production across 13 principles; only “ResponsibleSteel Certified Steel” carries a decarbonisation Progress Level from 1 to 4.

Can you meet Buy Clean California limits?

For fabricated hot-rolled sections the limit is 1,080 kg CO2e/t with a facility-specific EPD; EAF mills with published EPDs below that value can meet it. We confirm the mill and EPD before quoting.

Does CBAM apply to steel structures exported to the EU?

Yes – fabricated structures under CN 7308 are CBAM goods. Importers need the embedded emissions of the steel; we provide the mill data for the declaration.

Does green steel cost more?

Often, depending on the mill and market. Reducing tonnage through design optimisation usually saves more carbon per dollar, so we do both.

Planning a lower-carbon steel structure?

Tell us your rating tool, carbon target or GWP limit – we propose mills, products and documentation with the quotation.

Request a green steel proposal +84 902 881 833