Salzgitter Mannesmann Grobblech

What Salzgitter Mannesmann Grobblech does

Salzgitter Mannesmann Grobblech GmbH is a German heavy plate steel manufacturer operating as a wholly-owned subsidiary of Salzgitter AG, headquartered at Sandstraße 140 in Mülheim an der Ruhr. The company runs three integrated business units: the Blechwalzwerk heavy plate mill, which uses a 5.1-meter-wide Quarto rolling stand to produce heavy plates across a wide spectrum of steel grades; the Rohrbiegewerk pipe bending plant, which produces hot induction bends for longitudinally seam-welded line pipes; and the Prüfzentrum test centre, which provides material testing and calibration services. Its primary end-markets are offshore wind tower construction, pipeline systems, pressure vessels, shipbuilding, and automotive manufacturing, with named enterprise customers including Siemens Gamesa, RWE, Ørsted, Vattenfall, and Iberdrola.

The company's underlying technology centres on a capital-intensive 5.1-meter Quarto rolling mill that enables production of specialised heavy plates for demanding applications such as offshore wind monopiles and high-pressure pipelines. The company participates in the Salzgitter AG group's SALCOS hydrogen-based direct reduction programme, including the SuSteelAG pilot at HyIron Green Technologies' Namibia rotary kiln (which successfully processed 80 tonnes of low-grade Australian iron ore) and the integration of ANDRITZ electrolysis stacks at the Salzgitter site. The product portfolio includes Fine-Grain Structural Steels S690 and a Low Emission Steel Standard (LESS-005-2025) with environmental product declarations covering scrap-based electric steel options.

The business model is B2B enterprise direct sales, with dedicated sales departments for Germany (Tony Dachner) and Export (Oliver Laubner), quote-based multi-year contracts, and no publicly disclosed pricing. Revenue is generated from heavy plate sales, pipe bending services, and testing/calibration services. The company sells into multi-year project cycles tied to European energy and infrastructure capex, with growing emphasis on low-CO2 steel grades aligned with EU decarbonization mandates. Management consists of three managing directors: Beatrice Fiege (Personnel), Thorsten Gintaut (Sales), and Hans-Jaan Rachner (Engineering, Finance and Controlling).

Name

Salzgitter Mannesmann Grobblech

Legal name

Salzgitter Mannesmann Grobblech GmbH

Website

https://smgb.de

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Salzgitter Mannesmann Grobblech GmbH is a German heavy plate steel manufacturer, operating a 5.1-meter Quarto rolling mill, pipe bending plant, and test centre as a subsidiary of Salzgitter AG. It serves offshore wind, pipeline, shipbuilding, pressure vessel, and automotive customers with conventional and low-CO2 steel grades.

Ownership category

akta.pro rank

Product category

Heavy Steel Plate Manufacturing

NAICS

Rolling and Drawing of Purchased Steel (33122), Plate Work Manufacturing (332313), Fabricated Pipe and Pipe Fitting Manufacturing (332996), Plate Work and Fabricated Structural Product Manufacturing (33231)

SIC

Fabricated Plate Work (Boiler Shops) (3443), Steel Pipe & Tubes (3317), Fabricated Structural Metal Products (3440)

akta.pro primary industry

Hot Rolling & Primary Mills (Plate, Hot-Rolled Coil/Sheet, Strip) (IMAKABAE)

akta.pro secondary industries

Pipe & Tube Manufacturing (Seamless & Welded OCTG/Line Pipe/Structural Tube) (IMAKABAI), Marine-Grade Steel Plate, Profiles & Sections (IMAJAKAA)

Keywords

• Heavy plate steel
• Steel plate manufacturing
• Quarto rolling mill
• Line pipe plates
• Structural steel products

Headquarters

HQ city

Mülheim An Der Ruhr

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Heavy Plate Sales: Sale of heavy plate steel products manufactured from the rolling mill, serving industries including offshore wind tower construction, pipeline systems, automotive, shipbuilding, and pressure vessel manufacturing.
2. Pipe Bending Services: Production and supply of inductively bent pipes, offering complete solutions from steel to finished bends.
3. Testing and Calibration Services: Material testing and calibration services through the company's Test Centre.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Salzgitter Mannesmann Grobblech GmbH manufactures heavy steel plate using a 5.1-meter wide quarto rolling mill, supplying raw material for longitudinally welded pipes, offshore wind tower construction, shipbuilding, and pressure vessel applications. The company also produces inductively bent pipes and provides material testing and calibration services through its integrated Test Centre.

Product overview

Salzgitter Mannesmann Grobblech GmbH operates as a steel manufacturer and processor with three integrated business units: (1) the Blechwalzwerk (Heavy Plate Mill) producing heavy plates using a 5.1-meter-wide quarto rolling mill for applications including offshore wind, shipbuilding, and pressure vessels; (2) the Rohrbiegewerk (Pipe Bending Plant) manufacturing inductively bent pipes for line pipe systems; and (3) the Prüfzentrum (Test Centre) providing material testing and calibration services. The company also offers specialized products including Fine-Grain Structural Steels S690 and maintains environmental certifications through its Low Emission Steel Standard (LESS) program.

Differentiator

Problem solved

Functional benefit

Products and services

• Blechwalzwerk (Heavy Plate Mill) Heavy plate rolling mill producing steel plates via a 5.1-meter wide quarto rolling mill, serving pipe manufacturers, offshore wind tower fabricators, shipbuilders, and pressure vessel manufacturers across a wide spectrum of steel grades.
• Rohrbiegewerk (Pipe Bending Plant) Manufacturing facility producing hot induction bent pipes for longitudinally seam-welded line pipe systems, offering complete solutions from steel to finished bends.
• Prüfzentrum (Test Centre) In-house facility providing material testing and calibration services for steel products, supporting quality assurance for industrial customers.
• Fine-Grain Structural Steels S690 High-strength fine-grain structural steel product line for demanding engineering applications requiring elevated mechanical performance.

Quantifiable outcome

• Successfully processed 80 tonnes of low-grade Australian iron ore (56% iron content) into direct reduced iron at approximately five tonnes per hour throughput

Named customers3 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Seven partnerships are on record, tiered core.

• ØrstedcoreStrategic or Co-development Partner · 9 February 2026Strategic partnership and power purchase agreement with Ørsted to secure green electricity for decarbonised steel production at Salzgitter AG facilities.
• VattenfallcoreStrategic or Co-development Partner · 9 February 2026Strategic partnership and power purchase agreement with Vattenfall to secure green electricity for decarbonised steel production.
• Iberdrola DeutschlandcoreStrategic or Co-development Partner · 9 February 2026Strategic partnership and power purchase agreement with Iberdrola Deutschland to secure green electricity for decarbonised steel production.
• Siemens GamesacoreChannel Partner/ Reseller/ DistributorSupply contract for 25,000 tonnes of heavy plate for offshore wind tower construction. Salzgitter Mannesmann Grobblech serves as steel supplier for Siemens Gamesa's offshore wind projects.
• HyIron Green TechnologiescoreStrategic or Co-development PartnerHyIron Green Technologies' hydrogen rotary kiln in Oshivela, Namibia hosted the first industrial-scale pilot test of the SuSteelAG consortium, converting low-grade iron ore into direct reduced iron using hydrogen.
• Salzgitter Mannesmann Forschung GmbHcoreStrategic or Co-development PartnerSalzgitter Mannesmann Forschung GmbH will investigate integration of hydrogen-reduced iron into existing industrial steelmaking processes to produce climate-friendly steel.
• ANDRITZ Environment & EnergycoreTechnology or IntegrationANDRITZ Environment & Energy delivered the first electrolysis stacks for the SALCOS project at Salzgitter, supporting hydrogen-based steel production.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• SSAB: Swedish steel producer with heavy plate operations and a globally leading green-steel (HYBRIT) hydrogen DRI transition program. Comparable on heavy plate products and on early hydrogen DRI positioning.
• Dillinger Hütte: Germany-based heavy plate producer (Dillinger Hüttenwerke) operating wide quarto plate mills for line pipe, offshore wind, and structural applications. Closest direct competitor to SMGB in European heavy plate for pipe and wind tower applications.
• voestalpine Grobblech: Austrian steel group with a heavy plate division producing high-strength plate for offshore wind, line pipe, and pressure vessels. Directly comparable product portfolio and end-market overlap with SMGB.

Broad incumbents

• Tata Steel (Europe): European integrated steel producer offering plate and structural products into similar offshore wind and infrastructure end markets as SMGB.
• ArcelorMittal: World's largest steelmaker with European heavy plate capacity serving the same offshore wind, pipe, and automotive markets as SMGB. Competes broadly but is not specialized in the niche plate segments SMGB targets.
• ThyssenKrupp Steel: Major German flat steel producer with overlapping capabilities in plate and downstream automotive/industrial supply. Broad incumbent with comparable German footprint.
• Liberty Steel: European steel group (GFG Alliance) with plate and special steel operations overlapping SMGB's industrial customer base across construction and energy.
• NLMK: Russian-headquartered global steel producer with significant heavy plate capacity serving pipe, wind, and construction markets in Europe and globally. Comparable product category though different geographic concentration.

Regional players

• POSCO Holdings: South Korean steel group referenced in SMGB/Salzgitter collaborative research communications (24th Steering Committee). Competes in heavy plate for global wind and shipbuilding but serves Asian primary markets.

Others

• ANDRITZ (Equipment / Process Partner): Supplies electrolysis stacks and process technology into SMGB's parent SALCOS hydrogen program. Comparable only as ecosystem/technology partner rather than a steel competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

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Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

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 Salzgitter Mannesmann Grobblech