BHP Renews Baowu Carbon Deal as Scope 3 Pressure Mounts

BHP and China Baowu Steel renewed their five-year carbon reduction memorandum of understanding on 20-21 September 2026, extending a partnership that first began in 2020 and pushing their joint work on lower-emissions steelmaking deeper into the next decade.

The timing is not accidental. The renewal lands at a moment when the world’s largest miner faces intensifying scrutiny over the emissions locked inside its supply chain, and when the world’s largest steelmaker is under pressure to peak and then cut its own carbon output.

For any Australian resource giant, the maths is unavoidable. Scope 3 emissions, the carbon released when overseas customers turn iron ore into steel, dwarf the emissions from digging the ore out of the Pilbara in the first place. Cross-border partnerships with steelmakers are the only realistic pathway to abate them.

Scope 3 reduction strategies available to large miners are structurally constrained by the fact that most abatement requires action at the customer end of the value chain, not at the mine gate, which is why partnership-based frameworks remain the dominant tool even as institutional pressure for harder targets intensifies.

That is what makes this deal worth reading closely. The question for investors is whether this renewed alliance genuinely secures BHP’s place in a carbon-constrained market, or whether it defers the harder problem of delivering absolute emission cuts this decade.

Pilbara ore pathways and the 30 percent reduction mandate

Strip away the corporate language and the renewed MoU is really about two pieces of engineering that will decide whether Pilbara iron ore stays commercially relevant.

The first is modified blast-furnace technology. The renewed agreement commits both parties to demonstrate steelmaking with a CO2 emissions intensity at least 30% below conventional blast-furnace operations, using BHP’s Pilbara ore. Where carbon storage and renewable energy can be added to those modified routes, BHP and Baowu state the reduction could exceed 80%.

The second is hydrogen-based direct reduced iron (DRI), a process that uses hydrogen instead of coal to strip oxygen from iron ore before smelting. This route feeds into Baowu’s planned demonstration-scale electric smelting furnace (ESF), together forming a near-zero-emissions pathway.

This is not theory. In late 2024, the two companies ran commercial-scale hydrogen-DRI trials at Baowu’s 1 million tonne per year shaft furnace at Zhanjiang, using Pilbara ore pellets. BHP reported the resulting iron carried an estimated 50% lower CO2 emissions intensity than conventional blast-furnace hot metal at the ironmaking stage.

The use of Pilbara ore in electric smelting processes carries a specific technical complication: the region’s predominantly lower-grade, higher-alumina ores behave differently in DRI shaft furnaces than the higher-grade Brazilian fines that most hydrogen-DRI technology was originally designed around, making Baowu’s Zhanjiang trials with Australian pellets particularly significant.

The renewal moves that work from proven pilot toward demonstration scale. Below is how the progress stacks up against the renewed targets.

Here is why the technical detail matters to you. These are not simply climate targets. A route that keeps Pilbara ore usable in low-emissions steelmaking is a commercial moat, one that protects BHP’s core revenue against a future where buyers pay a premium for auditable low-carbon inputs and shun everything else.

ESG scrutiny and the Scope 3 accounting dilemma

The optimism has a counterweight, and it comes from the institutional investors watching BHP’s climate strategy closely.

Their concern is straightforward. Cooperative research and development is welcome, but it is not the same as absolute, measurable Scope 3 emission cuts by 2030. BHP’s original 2020 partnership committed up to US$35 million over five years, and its 2030 goal is to support a 30% emissions-intensity reduction in integrated steelmaking, with widespread adoption expected only after 2030.

Critically, BHP frames this as a support goal, not a firm reduction target, stating it “cannot ensure the outcome alone.” Its 2050 net-zero goal for Scope 3 emissions depends entirely on customers adopting the technology.

ESG analysts argue this leans too heavily on downstream partners to solve BHP’s own climate liabilities. Analysis from the Institute for Energy Economics and Financial Analysis (IEEFA) in October 2024 warned that BHP may be lagging peers on Scope 3 and steel-technology transition, and that deferred operational investment reduces visibility over a credible net-zero path.

Civil-society groups add a sharper critique, questioning whether mass-balance accounting frameworks allow high-emissions steel to be sold under a green label without physical production changes. The three main lines of ESG concern are:

• Deferred operational capital expenditure, where analysts argue BHP has pushed back the spending needed to cut its own Scope 1 and 2 emissions this decade.
• Vague mass-balance accounting, where coalitions such as SteelWatch warn that creative carbon-accounting could let coal-based steel be marketed as low-carbon.
• Lack of absolute 2030 reduction mandates, where support goals replace firm, near-term Scope 3 targets.

BHP’s steelmaker partners collectively represent roughly 22% of reported global steel production, so the strategy has genuine reach. The vulnerability for you as a shareholder is different: if you hold the stock partly on its ESG credentials, dependence on external partners to deliver reductions is a risk that sits outside BHP’s direct control.

Navigating sovereign risk and Western green steel mandates

The partnership does not exist in a vacuum. It sits on a strategic tightrope between Western regulatory pressure and deep reliance on the Chinese market.

On one side, Western mechanisms are tightening. The European Union’s Carbon Border Adjustment Mechanism (CBAM), a levy on the carbon content of imported goods, is forcing miners to prove the low-carbon viability of their supply chains rapidly. Demonstrably lower-emissions steel made from Pilbara ore is precisely how BHP keeps that ore saleable under such regimes.

The Carbon Border Adjustment Mechanism has moved from policy proposal to active implementation pressure, with importers of steel, aluminium, and cement into the EU now required to report embodied carbon content, creating a direct commercial incentive for miners to certify the emissions intensity of ore entering European steel supply chains.

On the other side sits concentration risk. China has increasingly centralised iron ore procurement and flexed its bargaining power, including efforts to shift pricing toward yuan-based benchmarks. Baowu itself targets a 30% carbon-intensity reduction from 2020 levels by 2035, reaching around 1.3 tonnes of CO2 per tonne of steel, and carbon neutrality by 2050, so the decarbonisation ambition is real. The dependency, however, deepens with every joint project.

There is also the matter of what gets shared. Advanced hydrogen-DRI and CCUS know-how, plus operational data, flows to a single dominant sovereign partner.

Analysts caution that deep decarbonisation partnerships can involve the transfer of advanced process expertise and operational data to Chinese partners, who may later compete with or constrain Western miners should intellectual-property protections weaken or political tensions escalate.

For you, the read is uncomfortable but clear. A climate win carries a geopolitical cost. Weighing the environmental upside of this alliance against the strategic risk of deepening reliance on Chinese infrastructure is now part of holding BHP.

Weighing the value of R&D alliances against hard emission cuts

The central tension runs through the whole deal. The Baowu partnership is necessary, because BHP cannot abate its Scope 3 emissions without its largest customer, yet necessity does not excuse the absence of independent, near-term climate progress.

What this five-year extension signals is continuity rather than acceleration: BHP is committing to remain deeply embedded in China-centric green-steel value chains for the rest of the decade.

The milestones to watch are specific. Does the Zhanjiang hydrogen-DRI work graduate into a functioning demonstration-scale electric smelting furnace? Do modified blast furnaces hit the 30% intensity target in practice, not just on paper? Those outcomes will tell you whether pilot technology becomes commercial reality, or stays a promise.

For readers wanting to understand what competitive advantages Australian miners hold in the green iron transition, our full explainer on Australia’s green iron production advantages covers renewable energy access, ore quality considerations, and the policy landscape shaping domestic processing ambitions.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.

Past performance does not guarantee future results. Financial projections and targets are subject to market conditions and various risk factors.