CBAM & ESG Reporting for Steel: Scrap, Certs & Carbon Data

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GoSmarter is an AI platform that turns shop-floor data into audit-ready Carbon Border Adjustment Mechanism (CBAM) and Environmental, Social, and Governance (ESG) reporting evidence for steel and metals manufacturers. By combining AI cut plan optimisation, mill certificate digitisation, and automated traceability, GoSmarter customers cut avoidable scrap by up to 50%. That eliminates tonnes of embedded CO₂e per reporting period, with no separate sustainability project required.

Steel is one of the first sectors listed under the EU’s CBAM, and UK manufacturers exporting to Europe are already being asked to prove the embedded carbon of every tonne they ship.

That question will not go away. Full CBAM implementation lands in 2026. From that point, your EU customers will pay a carbon levy on imported steel proportional to its embedded carbon. They will pass that cost back to you. Or they will move to a supplier who can back up lower emissions with verified data. Your scrap rate and your cert data sit at the centre of that calculation.

GoSmarter connects AI-powered cut plan optimisation, mill certificate digitisation, and end-to-end traceability into one workflow. Your operational data becomes audit-ready ESG and CBAM evidence. No sustainability consultant required. No bespoke reporting project.

Here is what this post covers:

What CBAM requires, and what the 2026 timeline means in practice
Why scrap rate is a carbon multiplier, not just a margin problem
How your mill certs already contain the carbon data you need — and why you cannot report it yet
What ESG supplier questionnaires are asking right now
How GoSmarter links cut plans, certs, and traceability into a single reporting chain
Real numbers from the shop floor, including a live production trial

Let’s get into it.

CBAM Is Already Live — and Steel Is in the First Wave

What is CBAM? The Carbon Border Adjustment Mechanism is an EU regulation requiring importers of steel, aluminium, cement, fertilisers, and electricity to pay a carbon levy proportional to the embedded emissions of their goods. Steel entered CBAM’s transitional phase in October 2023. Full implementation (with mandatory certificate surrender) begins in 2026. UK manufacturers selling to EU customers are already receiving data requests linked to CBAM.

The Carbon Border Adjustment Mechanism came into force for EU imports in October 2023. Steel and iron were listed alongside aluminium, cement, fertilisers, electricity, and hydrogen. Steel is not an afterthought in this legislation. It is a primary target.

From 2026, importers of steel products into the EU must surrender CBAM certificates proportional to the embedded carbon of their goods. The price per certificate tracks the EU Emissions Trading System (ETS) carbon price. Over the past two years that price has moved between €40 and €100 per tonne of CO₂e.

The practical impact for UK manufacturers: if you sell to EU buyers, those buyers now carry a carbon cost on your product. Some will absorb it quietly. Most will renegotiate, or shift sourcing to lower-carbon suppliers who can demonstrate verified data. Either way, the question is coming: what is the embedded carbon of the steel you supplied, and can you prove it?

Primary steel produced via the blast furnace route carries approximately 1.8 to 2.1 tonnes of CO₂e per tonne of finished product. Processing and fabrication add to that figure every time avoidable scrap is generated. Reducing scrap at your stage is one of the few things a fabricator can actually control.

The European Commission’s official CBAM guidance is published at taxation-customs.ec.europa.eu.

Scrap Rate Is a Carbon Multiplier, Not Just a Margin Metric

Most production teams track scrap rate because it hurts margin. At 3 to 8% (where many long-product fabricators sit), it is a painful and visible cost. The industry best-practice target is 2.5% or below. Fewer teams have worked through the carbon arithmetic.

Every tonne of avoidable scrap represents steel that was produced, transported, processed, and cut, then failed to end up in a finished product. That material carries its full upstream carbon cost regardless of where it ends up. At the fabrication stage, optimised cut plans avoid approximately 0.3 to 0.5 tCO₂e per tonne of scrap eliminated, because the steel stays in the order rather than being downgraded or recycled at a loss.

Put that in operational terms. A mid-sized rebar fabricator processing 1,000 tonnes a month at a 5% scrap rate generates around 50 tonnes of avoidable scrap monthly. Cutting that to the 2.5% best-practice target saves 25 tonnes of scrap per month. At 0.4 tCO₂e per tonne avoided, that is 10 tonnes of CO₂e removed from the monthly footprint. And you have not changed energy source, supplier, or furnace configuration.

Your scrap rate is not just a margin problem. It is an emissions multiplier. Under CBAM, your EU customers are starting to price it that way.

What Your Mill Certificates Already Know (And Cannot Report)

A standard mill certificate contains: heat number, steel grade, chemical composition, mechanical properties, and (increasingly, from major European and UK mills) a carbon equivalence value aligned with Environmental Product Declaration (EPD) standards.

That data is already in your possession. The problem is that it is buried in PDFs, sitting in filing cabinets or on shared drives, unsearchable and unreportable.

GoSmarter’s MillCert Reader extracts all of that information automatically. Upload the cert (scanned paper, photographed on a phone, or a digital PDF) and the system reads the heat number, grade, chemical composition, and carbon equivalence in under 15 seconds per page. The data becomes searchable, linkable to stock by heat number, and exportable for reporting.

That alone saves 120+ hours per year of manual data entry. More importantly for CBAM purposes, it means the carbon data that is already printed on your certificates is now in a format you can actually use.

The ESG Questionnaire Your Customer Just Sent You

ESG supplier questionnaires have shifted fast. Two years ago they asked for an ISO 9001 certificate and a signed environmental policy. Today’s questionnaires from large construction, infrastructure, and automotive procurement teams ask:

What is your current scrap rate?
What is your CO₂e intensity per tonne of output?
Can you provide full traceability to heat number for the material you supplied?

These are not box-ticking questions. They are scored. A main contractor tendering for a major infrastructure project needs to report supply chain carbon intensity to their client. If your answers are “we estimate around 5%,” “we do not track that formally,” and “we can find the cert if you give us a week,” you are not competitive for that contract.

GoSmarter answers all three automatically. Scrap rate is tracked per job and per reporting period. Carbon impact per tonne is calculated using the embedded figures extracted from your mill certs. Traceability from delivery cert to customer despatch is built into the compliance management module as a continuous, searchable audit chain.

Connecting Cut Plans to Carbon Reports

The GoSmarter workflow connects three things that are currently separate in most operations: the cut plan, the mill certificate, and the compliance record. This is carbon accounting made operational. Not a separate sustainability project. Just data your shop floor already produces.

Step 1: Cut Less Scrap With AI-Optimised Cut Plans

The Cutting Optimiser generates AI-powered cut plans for long products (rebar, sections, beams). It sequences open orders against available stock lengths to minimise offcuts and trim waste. In a two-week trial with Midland Steel, it saved 20.22 tonnes of steel scrap across 734 tonnes processed: a 50% reduction in scrap generation compared to manual cut planning. That is carbon avoided, not just cost avoided.

Step 2: Digitise Mill Certs at Goods-In — Not at Audit Time

Every delivery of steel arrives with a mill certificate. The MillCert Reader processes it at goods-in. Heat number, grade, and carbon equivalence are extracted and linked to that stock record. When material moves into a cut plan, the carbon data travels with it. No manual transcription. No paper file that cannot be searched.

This data forms the foundation of a product carbon footprint declaration: the output required for Science Based Targets initiative (SBTi) and CBAM-aligned scope 3 emissions reporting. It is also what your mill certificate automation workflow produces automatically, without a separate digitisation project.

Step 3: Build the Audit Trail That CBAM and ESG Questionnaires Require

The compliance management module links every cut from a specific heat number to the customer order it fulfilled. When an EU customer (or their auditor) asks for embedded carbon evidence for a delivery, you are not reconstructing records from memory or inbox searches. You pull the report. It covers supplier certificate, heat number, carbon equivalence value, cut plan, and despatch confirmation in one chain.

That is how shop-floor data becomes ESG and decarbonisation evidence. The full cert-to-despatch chain is documented in the integrated cert traceability hub.

Real Numbers from the Shop Floor

The Midland Steel Results

Midland Steel ran a two-week production trial using GoSmarter’s AI-powered cutting plans in 2025. Across 193 jobs and 734 tonnes of steel, the Cutting Optimiser saved 20.22 tonnes of avoidable scrap: a 50% reduction against their manual cut planning baseline.

At 0.4 tCO₂e per tonne of scrap avoided, that two-week trial eliminated approximately 8 tonnes of CO₂e from Midland Steel’s output. Annualised across a full year of production at similar throughput, that is a credible, documented carbon reduction. The business can report it to customers and include it in ESG disclosures.

The Midland Steel case study has the full trial methodology and results.

What the Maths Looks Like Per 1,000 Tonnes Processed

	Unoptimised	GoSmarter-optimised	Saving
Scrap rate	5%	2.5%	−50%
Avoidable scrap per 1,000t	50 tonnes	25 tonnes	25 tonnes
CO₂e from avoidable scrap	~20 tCO₂e	~10 tCO₂e	~10 tCO₂e saved
CBAM / ESG position	Exposed — high embedded carbon	Defensible — verifiable data	Measurable, reported improvement

Figures use 0.4 tCO₂e per tonne of scrap eliminated at the fabrication stage. The Business Case Calculator below lets you run this with your own throughput and current scrap rate.

How to Calculate Your Own ESG Impact Before the Questionnaire Lands

The numbers above use a typical mid-range figure. Your actual impact depends on your throughput, your current scrap rate, and the carbon intensity of the steel grades you buy.

GoSmarter’s Business Case Calculator runs the full model. Input your monthly tonnage processed and your current scrap rate. It calculates the CO₂e saving from reducing to the 2.5% best-practice target and converts that into an estimated carbon cost figure using current market carbon pricing.

The 0.3 to 0.5 tCO₂e figure used in the comparison table above reflects only the fabrication-stage impact: the carbon cost of the scrap generation process itself. When you include the full upstream production footprint of primary steelmaking (blast furnace, rolling, transport), one tonne of avoidable scrap carries approximately 1.8 tCO₂e in total embodied carbon. That larger figure is what appears in lifecycle carbon declarations and ESG supplier questionnaires. The Business Case Calculator works with the full lifecycle number so the output is directly usable in reporting contexts.

Being able to say “we reduced avoidable scrap by 50% last year, saving 240 tonnes of CO₂e — here is the verified data” is a different conversation from “we are working on our sustainability programme.”

Run the calculator before that conversation happens. Want to see what GoSmarter costs before you run the numbers? Our pricing page gives you the full picture.

Frequently Asked Questions

Does CBAM apply to UK manufacturers selling to UK customers?

Not directly. CBAM is an EU import mechanism — it applies to goods imported into the EU. However, if your UK customers export finished goods into the EU, they may pass the carbon data requirement back up the supply chain to you. And ESG supplier questionnaires from large UK buyers in construction, rail, and infrastructure are increasingly mirroring EU requirements regardless of export destination.

What carbon data does GoSmarter extract from mill certificates?

GoSmarter’s MillCert Reader extracts heat number, steel grade, chemical composition, mechanical properties, and — where present on the certificate — carbon equivalence values. For mills that include Environmental Product Declaration data or declared embedded carbon figures, those values are captured automatically and linked to stock by heat number.

How does reducing scrap rate affect our CBAM position?

Reducing avoidable scrap at the fabrication stage lowers the embedded carbon intensity of your output product. Less scrap means more of the steel you purchased ends up in finished goods rather than being recycled at a loss. That improves the carbon-per-tonne figure you report to EU customers and reduces the CBAM liability they carry on your product.

Can GoSmarter produce a carbon report for a customer or CBAM audit?

Yes. The integrated cert traceability module links every batch of material from delivery cert through to customer despatch, including the carbon equivalence data extracted from mill certificates. You can export this as an audit-ready record for customer ESG questionnaires, CBAM-related declarations, or Science Based Targets initiative (SBTi) scope 3 reporting by your customers.

What if our mill certificates do not include carbon equivalence data?

Many certificates from mainstream UK and European mills now carry carbon equivalence figures. For those that do not, GoSmarter records the full chemical composition from the cert, which can be used to calculate carbon equivalence using standard formulae. The compliance module supports this calculation and flags any gaps in the data at goods-in rather than at audit time.

How does this connect to SBTi and net-zero steel commitments?

The Science Based Targets initiative (SBTi) net-zero steel roadmap requires year-on-year scrap reduction data as part of scope 1 and scope 2 reporting for steel producers, and increasingly as scope 3 data for downstream fabricators. GoSmarter tracks scrap rate per period and per product type, giving you the trended data that SBTi-aligned reporting requires — without a separate data collection exercise.

What is embedded carbon in steel, and why does it matter for CBAM?

Embedded carbon (also called embodied carbon) is the total CO₂e emitted during the production, processing, and transport of a material before it reaches the construction or fabrication site. For steel, the figure typically ranges from 1.8 to 2.1 tCO₂e per tonne for blast furnace primary steel. CBAM uses embedded carbon as the basis for calculating the levy EU importers must pay — so the higher your product’s embedded carbon, the higher the cost your EU customer carries.

What payback period should we expect from AI scrap reduction?

Midland Steel’s GoSmarter trial delivered measurable scrap reduction within two weeks. For a fabricator processing 1,000 tonnes per month at a 5% scrap rate, reducing to the 2.5% best-practice target saves roughly 25 tonnes of steel per month — worth approximately £9,000 to £12,000 at current steel prices, plus the carbon cost avoided. Most GoSmarter customers reach payback within three to six months. The Business Case Calculator gives a figure specific to your throughput and current scrap rate.

What records do I need to keep for CBAM compliance as a UK manufacturer?

UK manufacturers supplying steel to EU importers should be prepared to provide: (1) mill certificate data including heat number and steel grade, (2) production process details showing the carbon intensity method used, and (3) evidence of embedded carbon calculations per tonne of output. GoSmarter’s compliance module maintains this chain automatically, linking delivery cert to heat number to cut plan to customer despatch in a searchable, exportable audit log.

How does GoSmarter's data connect to EU CBAM reporting?

GoSmarter exports the traceability chain — supplier cert, heat number, carbon equivalence data, cut plan, and despatch confirmation — in structured formats suitable for inclusion in CBAM declarant submissions or for sharing with EU customers preparing their own CBAM certificates. The compliance module does not submit directly to EU CBAM portals (submissions remain the declarant’s responsibility), but it produces the underlying data the declarant needs to complete them accurately.

Go Deeper

Scrap, Waste & Yield Optimisation — reducing scrap rates by up to 50%, with CBAM carbon impact data included
Cutting Optimiser — AI-powered cut plans for rebar, sections, and beams
MillCert Reader — extract heat numbers and carbon equivalence from PDF and scanned certs in under 15 seconds
Midland Steel Case Study — 50% scrap reduction across a live two-week production trial
Business Case Calculator — calculate your CO₂e saving and estimated CBAM impact using your own throughput numbers
Compliance Management — audit-ready traceability from goods-in to customer despatch

How Scrap Reduction and Cert Digitisation Feed CBAM and ESG Reporting