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bluemint® Steel – our high-quality flat steel with reduced CO2 intensity

Under the names bluemint® pure and bluemint® recycled, two new climate-friendly products were added to our portfolio in the fall of 2021. The special thing about them is that the material properties do not differ from existing steel grades – except in their reduced specific CO2 emissions. The certified steels are produced at the Duisburg site.

This is the first transformation success within the framework of our climate strategy and reflects the high standard of sustainable and customer-oriented steel production. In the coming years, we will invest intensively in innovations and technologies that will bring our customers closer to the common goal of climate neutrality and a green steel product.

General inquiry




thyssenkrupp Steel Europe AG

Kaiser-Wilhelm-Strasse 100

47166 Duisburg, Germany

+49 (0)203 52-0

More than an interim CO2 target: bluemint® Steel.

Two products, many advantages – bluemint® pure and bluemint® recycled. In a short film we explain what lies behind our green steel products with reduced CO2 intensity while maintaining the same quality.

The most important properties at a glance.who are aiming for CO2 savings in a global context.

The concept of low-carbon steels is of high interest to many processing and end-use industries. bluemint® pure is particularly attractive for customers who are aiming for CO2 savings in a global context. bluemint® recycled is aimed in particular at our customers for whom a high recycling content is important.

bluemint® pure

  • Measure: Use of HBI in the blast furnace, also hydrogen in the long run
  • CO2 reductions at Duisburg production site and in a global context
  • Allocated CO2 reductions lead to reduced product-related carbon intensity
  • CO2 reduction of 1.5 tonnes of CO2 per tonne of hot strip
  • Residual carbon intensity of 0.6 tonnes of CO2 per tonne of hot strip
  • Standard: WRI/WBCSD GHG Protocol for Product Accounting
  • Certified by DNV (Link to certificate)

bluemint® recycled

  • Measure: Use of scrap in the blast furnace
  • CO2 reductions at Duisburg production site
  • Balance-sheet CO2-neutral recycling product
  • CO2 reduction of 1.35 tonnes of CO2 per tonne of hot strip
  • Specific CO2 emissions of 0.75 tonnes of CO2 per tonne of hot strip
  • Standard: DIN EN ISO/IEC 17029 and TÜV SÜD VERIsteel Standard
  • Certified by TÜV SÜD (Link to certificate)

Advantages of bluemint® Steel – at a glance

  • CO2 emissions reduced by about 1.5 tonnes (70 percent) (bluemint® pure)
  • CO2 emissions reduced by about 1.35 tonnes (64 percent) (bluemint® recycled)
  • CO2 is directly reduced at Duisburg production site
  • Certificates for the respective product
  • Primary steel, all qualities possible
  • Directly creditable against the Scope 3 emissions of our customers

Certified quality


bluemint® pure and bluemint® recycled stand for the variety of our portfolio of grades. This means that you can rely on the continued availability of the familiar materials. In terms of material and processing properties, our two bluemint® Steel products fall by no means short of our existing grades. On the contrary: The high premium quality is complemented by a significant CO2 reduction.

This is substantiated by our certificates: bluemint® pure is certified by the DNV and bluemint® recycled by TÜV SÜD.

The bathroom with a clean carbon footprint.

2019 2018

Franz KALDEWEI GmbH & Co. KG – Ahlen-based premium bathroom solution provider

In October 2021, CEO Franz Kaldewei personally ordered the first delivery of bluemint® Steel. Among other things, Kaldewei uses the material in the limited "Kaldewei nature protect" product series, which, in addition to attractive bathtubs, shower trays and washbasin bowls, also provides customers with a certificate showing the CO2 savings compared to standard products.

The manufacturer of bathroom articles made of recyclable enameled steel is doing everything in its power to safeguard future generations, and is placing even greater focus on sustainability. In summer 2021, Kaldewei became the first company in the sanitary industry to join the Science Based Target Initiative (SBTI), and has since been working to reduce its own carbon footprint in line with the Paris Climate Agreement.

Christian Graap, Technical Managing Director at Kaldewei, sees the greatest lever on the path to climate neutrality in the conversion of the primary material to green steel. "Steel is the optimum material for us because of its robustness, its good formability and, not least, its recyclability. However, its coal-based production is reflected in the CO2 balance of our own products. This changes with bluemint® Steel. Its use is an important step toward achieving our own climate goals."

The Managing Director of Kaldewei, Franz Kaldewei, adds: "bluemint® Steel gives us the certainty that we are already using the highest quality steel with a lower CO2 intensity for the production of our enameled steel bathroom products. This is an important step towards achieving our climate targets. With the new bluemint® Steel from thyssenkrupp Steel, we are overcoming a major hurdle on the way to Kaldewei's climate-neutral alignment.

CO2 reduction on the running electric steel strip.

2019 2018

SGB-SMIT – Transformer specialist from Regensburg

The first customer to use bluemint® powercore® with a 50% lower CO2 intensity is SGB-SMIT from Regensburg. The transformer manufacturer uses the CO2-reduced steel in distribution transformers for new digital stations operated by the energy specialist E.ON. SGB-SMIT is thus supporting the development of a decentralized supply network in which the share of wind power, photovoltaic and biogas plants is steadily increasing. "For us, it represents a great added value that the top grades of thyssenkrupp Steel are now also CO2-reduced. This is an important step towards further decarbonization of the energy process chain," says Managing Director Holger Ketterer. In order to effectively reduce CO2, the medium-sized company has set itself two goals: to continuously reduce energy losses in the utilization phase of the transformers and to cut the carbon footprint of the transformers themselves.

Holger Ketterer: "With the first goal, the energy transition is dealing us a good hand. The more renewable energies are used, the lower the CO2 emissions from energy losses. That's why our focus is already clearly on the climate impact of the materials we use."

E.ON also sees great potential in the more climate-friendly version of its well-known and proven products. "We are committed to a sustainable energy world for tomorrow – so it makes a big difference in the overall assessment of a plant if a substation or green power station also has transformers with CO2-reduced electric steel," says Achim Hübner, International Category Lead for transformers at E.ON.

Transformers play a central role in the energy transition, as they ensure the conversion and transmission of green electricity. To ensure that this happens with as little loss as possible, high-tech steels are used in the transformers, or more precisely: highly efficient grain oriented electric steel of the powercore® brand from thyssenkrupp Steel.

Climate protection can be done.

2019 2018

Hoffmann Neopac AG – Packaging specialist from Thun (Switzerland)

thyssenkrupp Rasselstein, together with the Swiss companies Hoffmann Neopac and Ricola, launched the world's first food can made from CO2-reduced bluemint® Steel in the spring.

Environmentally friendly materials are in high demand in the packaging industry. With its recyclable cans and tubes, the Swiss company Hoffmann Neopac is one of the industry's multiple award-winning pioneers. "Sustainability is at the heart of everything we do. We produce our cans in Switzerland with 100 percent renewable electricity, while working on our own decarbonization program," says Mark Aegler, CEO of Hoffmann Neopac.

The use of bluemint® Steel is part of this. In a joint project, thyssenkrupp Rasselstein is supplying the CO2-reduced packaging steel, while Hoffmann Neopac is producing and printing the cans using solar power.

Among the buyers is the Swiss herbal candy manufacturer Ricola. "It was important for us to make the packaging of our herbal candies more sustainable. That's why we are the first company in our market to use CO2-reduced food cans," says Dr. Martin Messerli, Chief Operating Officer of Ricola. The company has already been producing with electricity generated from hydroelectric power since 2016. From the Ricola Group's point of view, the next logical step was to optimize the supply chain and the packaging of the herbal candies. "By switching to a CO2-reduced can for our herbal candy specialties, Ricola is also responding to increased demand from consumers, who are paying more attention to the carbon footprint of their purchases," says Messerli.

HERE, to help you further.

ThyssenKrupp Contact

Dr. Carmen Ostwald

Head of Business Development bluemint® Steel

Telephone: +49 (0)203 52-24458

Send email

For press inquiries

ThyssenKrupp Contact

thyssenkrupp Steel Europe AG

Mark Stagge

Head of Public & Media Relations

Telephone: +49 (0)203 52-25159

Fax: +49 (0)203 52-25707

Send email

bluemint® Steel sets a precedent.
Web seminar on 5 May 2022

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