What Gontermann-Peipers GmbH does

Gontermann-Peipers GmbH is a privately held, family-owned German foundry (100% Familienbesitz) founded in 1825 and headquartered in Siegen, Germany, with two production plants — Werk Marienborn (Hauptstraße 20) and Werk Hain (Marienborner Straße 49) — operating with roughly 550 employees. The company runs four distinct casting processes under one roof: centrifugal casting (Schleuderguss), continuous casting (Strangguss), chill casting (Kokillenguss), and hand-mold casting (Handformguss), and has developed proprietary Verbundguss (composite casting) that merges two materials in a single component. Its three core product lines are high-performance work rolls in Semi-HSS and HSS grades for steel and aluminum rolling mills, cast components for general machinery, heavy machinery, hydraulics, pumps/compressors, and drive technology, and nuclear cask container bodies made from nodular cast iron for storage and transport of spent fuel and radioactive waste.

The business model is engineered-to-order B2B hardware sales with an attached contract-services book. Around the casting core, the company bundles large-scale precision CNC machining (turning up to 400t and 14,700mm length, deep-hole drilling to 7,000mm, cylindrical grinding), more than 20 heat-treatment furnaces (15m × 3.2m × 4.5m chambers), TIG/MIG/MAG welding and weld-cladding, and an in-house DIN EN ISO/IEC 17025-accredited testing laboratory for mechanical-technological testing, metallography, and spectral analysis. Pricing is quote-based and not publicly disclosed. Commercial reach is delivered through a direct enterprise field-sales organization with regional sales managers covering Europe, the Middle East, the USA, Canada, Mexico, Brazil, Latin America, Russia/CIS, Turkey, China, and India, supplemented by a channel partnership with Pinczolitsch GmbH for Central and Eastern European markets.

The customer base spans the steel and aluminum industries (rolling-mill rolls), machine building and heavy industry (cast components), hydraulics, and civil nuclear technology (containers), supported by an unusually dense regulatory stack for a sub-1,000-employee firm: ISO 9001, 14001, 50001, ISO/IEC 17025, 2014/68/EU pressure equipment, AD 2000-Merkblatt W0, KTA 1401 nuclear suitability, DNV GL, Lloyd's Register, AEO, and Bureau Veritas Mode II. The company is led by three Managing Directors — Frieder Spannagel, Klaus Habitzki, and Rainer Schönauer — with Eckhard Schulte chairing the Supervisory Board.

Name

Gontermann-Peipers GmbH

Legal name

Gontermann-Peipers GmbH

Website

https://gontermann-peipers.de

Company type

Private

Founded year

1825

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Gontermann-Peipers GmbH is a 1825-founded, family-owned German foundry in Siegen with two plants producing rolling-mill rolls, specialty cast components for machinery and hydraulics, and nuclear cask containers, integrated with in-house machining, heat treatment, welding, and an accredited testing laboratory.

Ownership category

akta.pro rank

Product category

Industrial Foundry / Specialty Steel Casting

NAICS

Iron Foundries (331511)

SIC

Iron & Steel Foundries (3320)

akta.pro primary industry

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

akta.pro secondary industry

Cold Rolling & Finishing (Cold-Rolled Coil/Sheet, Temper, Skin Pass) (IMAKABAF)

Keywords

• Rolling mill rolls
• Specialty cast iron
• Iron foundry products
• Nuclear cask containers
• Precision machining services

Headquarters

HQ city

Siegen

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Rolls Manufacturing: Design, manufacture, and sale of high-performance rolling mill rolls for steel and aluminum industries, including semi-HSS and HSS work rolls for roughing and finishing stands.
2. Cast Products: Cast components for general machinery construction, heavy machinery, and hydraulic industry produced using multiple casting processes (spin casting, continuous casting, chill casting, hand-mold casting).
3. Nuclear Containers: Nuclear cask container bodies for storage and transport in civil nuclear industry, manufactured from nodular cast iron (Kugelgraphit) for highest safety requirements.
4. Contract Processing Services: Precision mechanical processing, machining of components made from steel and cast materials, tool manufacturing, welding technology and repair processing, thermal spraying and coating, and surface treatment services.
5. Testing Laboratory Services: Material testing and analysis services including mechanical-technological testing, metallography, mobile testing methods, and positive material identification.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Gontermann-Peipers GmbH is a family-owned foundry producing rolling mill rolls (Walzen) for the steel and aluminum industries, specialty cast components (Gussprodukte) for machinery and hydraulic applications, and nuclear cask container bodies (Nuklearbehälter) for the civil nuclear industry. The company operates four distinct casting processes (spin, continuous, chill, and hand-mold casting) and complements manufacturing with in-house precision machining, heat treatment, welding, and an accredited testing laboratory.

Product overview

Gontermann-Peipers is a family-owned foundry company (founded 1825) offering three core product lines: Walzen (Rolls) for steel and aluminum rolling mills, Gussprodukte (Cast Products) via multiple casting processes for mechanical engineering, and Nuklearbehälter (Nuclear Containers) for civil nuclear waste management. These products are complemented by an integrated service portfolio including precision CNC machining, heat treatment, welding, and an accredited test laboratory. The company operates two production plants in Siegen, Germany—Werk Marienborn and Werk Hain—specializing in different product categories and casting methods.

Differentiator

Problem solved

Functional benefit

Brands

• GOPAG: Brand name for cast products, with trademark registration documented in the media library.

Products and services

• Walzen (Rolling Mill Rolls) High-performance work rolls in Semi-HSS and HSS grades used in roughing and finishing stands of steel and aluminum rolling mills. Targeted at steel and aluminum producers requiring durable rolls for demanding operating conditions.
• Gussprodukte (Cast Products)

Quantifiable outcome

• Extensive global sales network covering Europe, Middle East, USA, Latin America, Asia, Eastern Europe/CIS, and India

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Pinczolitsch GmbHminorChannel Partner/ Reseller/ DistributorSales partner for Austria, Slovakia, Slovenia, Czech Republic, Hungary, Croatia, Serbia, and Bosnia. Handles sales and distribution in these Central and Eastern European markets.

Scale indicators4 records

Recent moves5 records

Expansion highlights6 records

Direct peers

• ASCO Rolls: Swiss manufacturer of rolling mill rolls serving the steel and aluminum industries. Most direct European peer, with a comparable portfolio of cast iron and cast steel work rolls for hot and cold rolling mills.
• Villares Rolls (Sumitomo): Brazil-based roll manufacturer owned by Sumitomo Corporation, one of the largest global producers of cast iron and cast steel rolls. Direct competitor in work rolls for steel customers across the Americas, Europe, and Asia.
• Akers International: Swedish-founded roll manufacturer with operations in the US and Europe producing cast iron and cast steel rolls for flat-product and long-product rolling mills. Closely comparable product line and customer base in the steel industry.
• Friedrich Kocks GmbH & Co KG: German manufacturer of rolls and rolling mill equipment, including specialty cast iron and steel rolls. Competes directly in the European roll market and serves overlapping steel-mill customers.
• Eisenwerk Erla GmbH: German iron foundry producing cast components for machinery, hydraulics, and heavy industry using multiple casting processes. Comparable product mix on the cast products side and shared Mittelstand customer base.
• Siempelkamp GmbH: German manufacturer of heavy castings and nuclear storage/transport containers, including KTA-certified casks for spent nuclear fuel. Directly competes in the nuclear container market and shares heavy iron casting capabilities.
• Holtec International: US-based supplier of nuclear fuel storage and transport systems, including HI-STORM and HI-STAR casks. Competes directly for civil nuclear container business where Gontermann-Peipers supplies cast iron cask bodies.
• GNS Gesellschaft für Nuklear-Service mbH: German nuclear services company that designs, manufactures, and operates container systems (e.g., CASTOR) for spent fuel storage and transport. A direct competitor in European nuclear cask supply chains.
• Dango & Dienenthal GmbH & Co KG: German manufacturer of heavy castings and specialized foundry products for steelworks, mining, and heavy industry. Comparable cast iron and steel casting capabilities serving overlapping European industrial customers.

Broad incumbents

• Proterial Ltd (formerly Hitachi Metals): Large Japanese specialty metals and materials producer with a global roll manufacturing business among a broad portfolio. Overlaps with Gontermann-Peipers in rolls and specialty castings, but operates as a diversified incumbent rather than a focused foundry.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/gp_siegen
• YouTubeyoutube.com/@gontermann-peipers
• Facebookde-de.facebook.com/gontermann.peipers
• LinkedInlinkedin.com/company/gontermann-peipers-gmbh
• Instagraminstagram.com/gontermann_peipers

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 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 Gontermann-Peipers GmbH