Didier-Werke AG

What Didier-Werke AG does

RHI Magnesita N.V. is the leading global supplier of high-grade refractory products, systems, and solutions for industrial high-temperature processes. It was formed from the merger of RHI and Magnesita, with Didier-Werke AG appearing as a historical predecessor entity within the RHI group. The company is incorporated in the Netherlands, headquartered in Vienna, Austria, and listed on the London Stock Exchange (ticker RHIM).

The company's offering spans shaped refractory bricks and mixes, unfired monolithics (including the EVER alumina monolithics portfolio), specialized application machinery, and technical services such as Lining Evaluation Scan, Mechanical Kiln Audit, and the Training Center for Cement & Lime. Proprietary platforms include Spinosphere (cement), e-GEKKO (steel reduction), ANKRAL LC Series (CO2 reduction in cement), RADEX AF-LC (CO2 reduction in lime), 4PRO (integrated solution framework), and the Agellis and INTERSTOP sub-brands for steelmaking, continuous casting, and nonferrous applications. RHI Magnesita operates one of the most vertically integrated refractory value chains in the industry, drawing raw materials from owned mines, and runs the MIRECO recycling platform alongside the EU-backed RAPTOR consortium for refractory material recovery.

The business model is enterprise B2B, monetized through direct field sales of refractory products and systems (one-time license-style product sales), technical and professional services, and specialty refractory application machinery. Go-to-market is led by regional presidents and a global direct sales force serving heavy-industry customers in steel, cement, glass, foundry, nonferrous metals, lime, paper & pulp, and environment-energy-chemistry. Pricing is quote-based and not publicly disclosed. Recent strategic positioning includes the Corporate Strategy 2035 roadmap, the EU-backed RAPTOR recycling initiative, and partnerships with Polytec USA Corp. (digital transformation) and Morgan Advanced Materials (steelmaking insulation).

Name

Didier-Werke AG

Legal name

RHI Magnesita N.V.

Website

https://didier-werke.de

Company type

Public

Operating status

Operating

Headcount range

1–10 employees

Short description

RHI Magnesita is a leading global B2B supplier of high-grade refractory products, systems, and services for high-temperature industrial processes, serving steel, cement, glass, foundry, and other heavy industries through a vertically integrated, direct field-sales model.

Ownership category

akta.pro rank

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Refractory Products and Systems: RHI Magnesita generates revenue through the sale of high-grade refractory products, systems, and solutions to industrial customers in steel, cement, glass, foundry, and other sectors. Revenue is derived from both product sales and associated services.
2. Refractory Services: Technical services including lining evaluation, mechanical kiln audits, and application services for refractory products
3. Refractory Application Machinery: Special machinery and equipment for application of refractory products

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Didier-Werke AG is a historical entity within the RHI Magnesita corporate lineage that manufactures and supplies high-grade refractory products, systems, and solutions for industrial high-temperature applications. Its successor operations deliver shaped refractory bricks, monolithics, application machinery, and technical services (such as lining evaluation and kiln audits) to enterprise customers in steel, cement, glass, foundry, lime, nonferrous, paper & pulp, and environment-energy-chemistry sectors. The business is supported by vertical integration with own raw material mines and proprietary CO2-reduction technologies.

Product overview

RHI Magnesita is the leading global supplier of high-grade refractory products, systems, and solutions. The company operates as a vertically integrated refractory industry with its own raw material mines. The product portfolio includes shaped refractory bricks and mixes, unfired monolithics (EVER alumina monolithics), specialized machinery (Refractory Application Machinery), and comprehensive services (4PRO, Lining Evaluation Scan, Mechanical Kiln Audit, Training Center). Key technology products include e-GEKKO for steel reduction, Spinosphere Technology, ANKRAL LC Series, and RADEX AF-LC. The company also operates the MIRECO refractory recycling platform and publishes the Bulletin journal. Industry-specific solutions are delivered through the Agellis brand (Iron Making, Steel Making, Continuous Casting, Nonferrous Solutions) and INTERSTOP systems. Services span multiple industries including Steel, Foundry, Cement, Glass, Lime, Nonferrous, Paper & Pulp, and Environment-Energy-Chemistry.

Differentiator

Problem solved

Functional benefit

Brands

• MIRECO: Refractory recycling platform operated by RHI Magnesita for material recycling initiatives.
• 4PRO
• ANKRAL LC Series
• RADEX AF-LC
• EVER
• e-GEKKO
• Spinosphere Technology
• Agellis
• INTERSTOP

Products and services

• 4PRO All-encompassing solution addressing evolving challenges of industry and society, providing comprehensive refractory services for industrial customers across multiple sectors.
• EVER - Alumina Monolithics Portfolio Comprehensive alumina monolithics portfolio delivering performance, clarity, and consistency across industrial sectors requiring refractory solutions.
• ANKRAL LC Series Refractory product line for cement applications designed to reduce CO2 emissions in cement processes.
• RADEX AF-LC Refractory product for lime applications designed to reduce CO2 footprint in lime production.
• Refractory Application Machinery Specialized machinery and equipment for application of refractory products in industrial settings.
• Agellis - Iron Making Solution Iron making solution for industrial applications under the Agellis brand.
• Agellis - Steel Making Solutions Steel making solutions for industrial applications under the Agellis brand.
• Agellis - Continuous Casting Solution Continuous casting solution for steel production under the Agellis brand.
• Agellis - Nonferrous Solutions Nonferrous solutions for nonferrous industry applications under the Agellis brand.
• INTERSTOP Systems & Solutions Systems and solutions for refractory applications under the INTERSTOP brand.
• MIRECO Refractory Recycling Platform Refractory recycling platform operated by RHI Magnesita for sustainable refractory material recovery and reuse.
• Refractory Services (Including Lining Evaluation Scan and Mechanical Kiln Audit) Technical services including lining evaluation scan for cement kiln linings, mechanical kiln audits for cement operations, and other application services for refractory products.
• Training Center Cement & Lime Training services for cement and lime industry professionals on refractory products and applications.

Quantifiable outcome

• EcoVadis Gold Medal placing company among top 5% globally for ESG performance
• +2 more outcomes

Named customers6 records

Segments9 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Morgan Advanced MaterialscoreStrategic or Co-development Partner · 19 March 2026Regional commercial collaboration to advance insulation performance in steelmaking applications. RHI Magnesita and Morgan Advanced Materials have worked together to innovate thermal performance in steel treatment applications.
• RAPTOR Consortium PartnerscoreStrategic or Co-development Partner · 17 November 2025European technology consortium led by RHI Magnesita to unveil RAPTOR, a new benchmark system for refractory recycling. EU-backed project supporting Green Deal targets, EU competitiveness and security.
• Polytec USA Corp.coreTechnology or Integration · 23 October 2025Partnership agreement to drive digital transformation. RHI Magnesita and Polytec USA Corp. announced a partnership to advance digital transformation initiatives within RHI Magnesita's operations.
• MIRECOminorOthersRefractory recycling platform operated by RHI Magnesita for sustainable refractory material recovery and reuse

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Shinagawa Refractories: Major Japanese refractory producer serving steel, cement, and glass industries across Asia. Direct competitor in shaped refractories and monolithics with similar customer base and technology offerings.
• Resco Products: US-based refractory manufacturer specializing in monolithic and pre-cast shapes for steel, aluminum, and cement industries. Comparable mid-sized competitor with similar product mix and US/EU customer base.
• Morgan Advanced Materials: UK-based specialist in advanced ceramics and refractory products for industrial applications. Recent commercial collaboration with RHI Magnesita in steelmaking insulation confirms direct overlap in product offerings and end markets.
• Krosaki Harima Corporation: Japanese refractory manufacturer (now part of Nippon Steel) producing bricks, monolithics, and functional refractories for steelmaking. Directly comparable in product mix and heavy-industry customer focus.
• HarbisonWalker International (HWI): One of the largest North American refractory manufacturers, offering shaped and monolithic refractories for steel, cement, glass, and foundry. Directly comparable in product portfolio, vertical integration, and B2B heavy-industry customer base.

Regional players

• Chosun Refractories: Korean refractory manufacturer producing bricks and monolithics primarily for steel and industrial applications. Comparable in product offerings but focused on Korean and broader Asian markets.
• Dalmia-OCL (formerly OCL Refractories): Indian refractory manufacturer serving South Asian steel and cement markets with growing global ambitions. Comparable in product portfolio but primarily a regional competitor in geography overlapping less with RHI Magnesita's core markets.

Broad incumbents

• Imerys: French specialty minerals group producing refractory raw materials (including calcined aluminas) and mineral-based solutions. Adjacent competitor as a supplier of raw materials that compete with RHI Magnesita's vertically integrated mine output.
• Saint-Gobain: French multinational building materials and high-performance materials group with refractory product lines among its broader portfolio. Comparable in industrial customer base and serving as a large incumbent with overlapping capabilities in high-temperature materials.

Emerging players

• Puyang Refractories Group: Major Chinese refractory manufacturer with growing international presence in steel and cement applications. Competes on cost in commodity-grade refractories and represents the Asian capacity pressure on price.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat7 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/didier-werke-ag

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Didier-Werke AG