The way of steel

Steel trading with service. Convincingly innovative.

INTERFER – Your global partner

01 | Who we are

All from one partner

Whenever, how and wherever you need steel - we ensure that it is available for you according to your requirements and needs. On the market for over 35 years, we are now one of the most important importers of steel bars to Europe. With an established global network and excellent services, INTERFER guarantees you reliable sources of supply and delivery routes for long and flat products as well as alloys and materials for steel production. Whether for the automotive or construction industry, mechanical engineering sector, the energy sector and other industries.

Flexible and competent the INTERFER team manages to provide you with convincing complete solutions based on experience and negotiating skills. Quickly available, solidly financed and delivered on time. We represent you as a completely customer-oriented steel trader on the international steel market. Our mission is your continued business success and satisfaction.

Illustration Weltkugel

Reliable and committed. Complete service to the point.

02 | Therefore INTERFER


Steel is more than just a product for us. Steel is the essential basis for technical, economic and social progress in our world. INTERFER makes its contribution to this with a comprehensive range of steel products and a service that is entirely dedicated to the customer's requirements.

Long and flat products, alloys and materials for steel production.




We know the requirements in the steel business and see ourselves as your service partner, who handles your needs both precisely and comfortably. We support you from the very first minute with a comprehensive steel trading service. We fulfill your individual orders with competence and routine and are open for the special. In doing so, we always find the best conditions for you in purchasing, financing and logistics.


INTERFER relies on stable and trusting partnerships with suppliers and manufacturers worldwide. Regularly high acceptances ensure capacity utilization and productivity in the mills. We always have an eye on current market developments for you. In this way we guarantee a continuous supply of steel at attractive conditions.

Your trader - flexible and up-to-date on the market.


INTERFER supplies you economically and reliably with steel by maintaining close cooperation with well-established financial institutions. Our profound experience in trade finance opens up simple and fast financing options for you. 

Your financial needs - solved for you quickly and easily.


INTERFER takes care of customs clearance and insurance as well as shipping and transport to the destination. We deliver to your warehouse or to the destination of your choice. Our inspection of the goods before loading and unloading guarantees you a perfect delivery. 

Your delivery - checked, insured and on time at your location.


INTERFER offers you a cost-saving and efficient handling of your steel requirements. According to your requirements, we can also store various goods and qualities for you. In this way we make it possible for you to receive delivery from one hand. 

Your goods - well on the way.


INTERFER is a worldwide network with partners who live quality and service. We have an open ear for your very own questions and your current needs. Competent and flexible, we deliver the essential answers for your success with excellent technical expertise and reliably available capacities.

Your order - in safe and reliable hands.

Career at INTERFER

04 | Career at INTERFER

Career at INTERFER

At INTERFER you can expect more than an exciting working environment in the steel industry. INTERFER attaches great importance to professional know-how, result-oriented work and open cooperation.

We live our demand for service and quality also for our team. With us you are part of a lively and appreciative corporate culture. It is our declared mission to create a good and individual work-life balance with real employee benefits.

Anchored both internationally and locally in the Karlsruhe Technology Region - this makes us a truly attractive employer. You would like to give your career a new direction in a globally operating steel trading company?

Current job vacancies

INTERFER offers you:

Flexible Working Time
Flexible Working Time
Home Office
Home Office
Continuing Education Qualification
Continuing Education/Qualification
Company pension
Company pension
Company Parking
Company Parking
Good Transport Connections
Good Transport Connections
International Events
International Events
Kindergarten Allowance
Kindergarten Allowance
Free Fruits and Beverages
Free Fruits and Beverages
E-fuel Station
E-fuel Station


With the online calculator from INTERFER you can quickly and easily calculate the weight for tubes, round steel bars, square tubes, flat steel and sheets.

rundstahl quadratstahl flachstahl sechskantstahl achtkantstahl dreikantstahl rohrstahl



INTERFER Edelstahl Handelsges. mbH is founded by Peter Krohm, Hans Peter Voss and Hans-Georg Bothe. The focus is on trading with steel bars in Germany and from the former Czechoslovakia to Germany.


Manfred Wild becomes Managing Director of INTERFER Edelstahl Handelsges. mbH.


Foundation of INTERFER Steel s.r.o., Kladno/Czech Republic, as the first subsidiary of today's INTERFER Group.


Manfred Wild becomes sole shareholder of INTERFER Edelstahl Handelsges. mbH. Karlsruhe becomes the headquarter of the company.


Gerold Lorenz becomes CFO and Managing Director of INTERFER Edelstahl Handelsges. mbH.


Opening of the representative office in Dalian/China


Internationalization with the expansion of the markets in Southern Europe and the UK with new trade relations to Asia, the Mediterranean region and Eastern Europe

Foundation of INTERFER - Steel and Commodities GmbH to expand the product range to coils and sheet metal.


Foundation of INTERFER - Trade Finance GmbH to finance the commercial transactions of the INTERFER Group.


With the foundation of INTERFER - Steel and Commodities FZE, Dubai/UAE INTERFER expands its strategic scope of action and its international network.


Entry into the US market through the acquisition of Aurora Griff USA and subsequent renaming as INTERFER Steel USA Inc., Miami/USA .


After many years of joint venture for the sales of flat steel products in the UK, the INTERFER subsidiary Belmont & Knott Ltd., London/UK is founded.

Foundation of INTERFER Austria GmbH, Vienna/Austria, which, in addition to steel trading, primarily strengthens the area of raw materials for the steel industry.


Gerold Lorenz becomes sole shareholder and managing director of the INTERFER Group.


35 years

INTERFER Edelstahlhandelsges. mbH celebrates its 35th anniversary as a global player in the international steel market with an established network of reliable partnerships. This continuity and service concept that is always innovatively designed and lived daily continues to drive the expansion and success of the entire INTERFER Group.


Focused on the expansion of european business INTERFER Italia s.r.l. was founded in Milan/Italy.

Today INTERFER is one of the most important importers of steel bars to Europe. The network of the INTERFER Group is represented at 10 locations worldwide in both purchasing and sales.


INTERFER weltweit

ENGLISCH FEHLT The INTERFER Group is a reliable partner for the handling of commercial transactions worldwide offering a comprehensive range of long products and flat products.

With affiliates in Germany, the Czech Republic, the U.K. and India and with further representative offices in Europe, in the Middle East and in Asia, the group has a global orientation and is set up optimally to handle international trading in steel.

We are happy to receive a speculative application!


INTERFER Key Figures






Employees and business partners

≈ 450 mio €

Turnover of long and flat products annually


Die INTERFER Gruppe bietet als internationaler Stahlgroßhändler mit einem globalen Netzwerk Special-Steel-Service der Sonderklasse. Erfolgreich am Markt seit über 35 Jahren sind wir eine fest etablierte Größe im weltweiten Stahlhandel. Dabei setzt INTERFER seit jeher auf stabile und vertrauensvolle Beziehungen – auch und gerade zu seinen Mitarbeitenden. Kontinuität bei stetiger Innovation, eine lebendige und wertschätzende Firmenkultur, all dies macht uns international wie auch lokal zu einem attraktiven Arbeitgeber.

Alle wichtigen administrativen Funktionen der INTERFER Gruppe sind in unserem Head Office in Karlsruhe angesiedelt. Wir suchen zum nächstmöglichen Zeitpunkt eine engagierte Persönlichkeit mit Fachexpertise in Vollzeit als 

Assistenz der Geschäftsführung (a)

Wir freuen uns auf Bewerbungen (a)ller Menschen, die ihr Wissen und ihr Talent bei INTERFER einbringen möchten. Alle Menschen unterschiedlicher Herkunft, Hautfarbe, Alter, geschlechtlicher Identität, Religion, Geschlecht, sexueller Orientierung oder Behinderung heißt INTERFER herzlich willkommen. Dafür steht das (a) im Jobtitel.

Zu Ihren Aufgaben gehören:

SIE bringen mit:

WIR bieten Ihnen:

Sie möchten mehr als administrative und organisatorische Aufgaben übernehmen? Sie haben das große Ganze im Auge und möchten alle wichtigen „Fäden“ für die Geschäftsleitung in der Hand halten sowie auch die Belange der Mitarbeitenden spiegeln?

Dann starten Sie Ihre Karriere bei INTERFER.

Senden Sie bitte Ihre vollständigen Bewerbungsunterlagen (Anschreiben, Lebenslauf, Zeugniskopien sowie Gehaltsvorstellungen/frühester Eintrittstermin), welche uns keine andere Wahl lassen als Sie einzuladen.

Bitte per E-Mail an

Matthias Stark  //  Personalreferent

INTERFER Gruppe  //  Wachhausstr. 5c  //   D - 76227 Karlsruhe



INTERFER Edelstahl Handelsgesellschaft mbH

Wachhausstr. 5c 
76227 Karlsruhe
Federal Republic of Germany

Represented by:

Managing Director: Mr. Gerold Lorenz


Telephone: +49 721 943 97 0
Fax: +49 721 943 97 77

Entry in the commercial register

Registration court: Mannheim local court
Registration number: HRB 105335

Value added tax-ID:

Value-added tax identification number in accordance with Section 27 a of the German Value Added Tax Act:
DE 143597866


Data protection declaration

Note: This is a translation of the German language data protection declaration. This translation is made for convenience purposes only. Only the German version is legally binding.

This data protection declaration applies to data processing in connection with your visit of our website

1. Name and contact data of the responsible body

The responsible body pursuant to Art. 4 para 7 of the General Data Protection Regulation (GDPR) is:

INTERFER Edelstahl Handelsgesellschaft GmbH
Wachhausstr. 5 c
76227 Karlsruhe/Federal Republic of Germany
Telephone: +49 721 943 97 0
Fax: +49 721 943 97 77

2. Collection and storage of personal data and the manner and purpose of the use thereof 

a) When visiting the Website
When visiting our website www.interfer, the browser used by you on your device automatically transfers information to our website’s server. This information is temporarily stored in a so-called log file. The following information is stored until automatic deletion:

We process the mentioned data for the following purposes:

The legal basis of the data processing is Art. 6 para. 1 sentence 1 lit. f GDPR. Our legitimate interest results from the above-mentioned purposes. We never use the collected data to gather information about you as a person.

b) When using our contact form

If you have any questions, we offer you the possibility to contact us via a form provided on our website. When you contact us we collect your e-mail-address - so that we know who sent the request and can respond to it -as well as all other data you provide to us voluntarily. The processing of data for the purpose of making contact with us takes place in accordance with Art. 6 para. 1 sentence 1 lit. a GDPR on the basis of your voluntary consent. We only use this data to process  and answer your request.The collected data resulting of the use of the contact formula are being deleted after the completion of your request

3. Transfer of data

Your personal data is not transferred to third parties for purposes other than those specified in the following.

We only transfer your personal data to third parties if:

To the extent legally permitted, we reserve the right to employ service providers to process personal data, especially processors, e.g. regarding storage capacities and hosting-services.


When  you  use  our  website,  cookies  are  also  stored  on  your  computer.  Cookies are  small text data files which are stored on your hard drive and attributed to the browser you are using and with which the place which sets the cookie (in this case, us) receives certain information. Cookies cannot execute any programs or transfer viruses to your computer. They serve the purpose of making the internet offering in general more user friendly and effective. The legal basis for the use of cookies on our website is Art. 6 para. 1 sentence 1 lit. f GDPR.
Temporary cookies are automatically deleted at the end of the visit of the website.  Most browsers accept cookies automatically. You  can  also  prevent  the  storage  of  cookies  with  a  corresponding  setting  in  your  browser software. If you prevent the storage of cookies, we wish to point out that you may not be able to fully use our website
5. Integration of services from external providers

a) Integration of Matomo

By using the web analysis service software Matomo (, a service provided by InnoCraft Ltd., 150 Willis St, 6011 Wellington, New Zealand (“Matomo”), data is collected and stored on this website on the basis of our legitimate interest in the statistical analysis of user behavior for optimization and marketing purposes in accordance with Article 6(1), point (f) of the GDPR. Pseudonymized user profiles may be created and evaluated based on this data for the same purposes. Cookies may be used to this end. The data collected with the Matomo technology (including your pseudonymized IP address) is processed by a server of Comotive GmbH.

The information generated by the cookie in the pseudonymized user profile is not used to personally identify the visitor to this website and is not merged with personal data about the holder of the pseudonym.

If you do not agree to data regarding your visit being stored and evaluated, you can object to the storage and use of this data at any time by clicking the “Opt out” button below. If you do this, an opt-out cookie will be placed on your browser, meaning that Matomo will not be able to collect any data regarding your session. Please be aware that if you completely delete your cookies, the opt-out cookie will also be deleted and you will have to opt out again. 

You may choose not to have a unique web analytics cookie identification number assigned to your computer to avoid the aggregation and analysis of data collected on this website.
To make that choice, please click below to receive an opt-out cookie.


b) Integration of OpenStreetMap

Our Website includes an OpenStreetMap map. When you open a web page with an OpenStreetMap, information about your visit, including your IP address, are transmitted to and stored on an OpenStreetMap server. This data transfer is carried out in line with the privacy policy and conditions of use of OpenStreetMap, which are made available on the website of the OpenStreetMap Foundation. We have no influence on how the data are used and processed.

6. Your rights

You have the right to

If the processing of your personal data is based on Art. 6 para. 1 sentence 1 lit. f GDPR, you have the right to object to the processing on grounds relating to your particular situation or to the fact that the data are processed for direct marketing purposes. In the latter case, you have a general right to object that we have to implement unconditionally. In any case, we do not use the personal data which you have provided to us for any direct marketing purposes.

7. Processing security

We use appropriate technical and organisational   security measures to protect your data against ran-dom or intentional manipulation, full or partial loss or destruction and unauthorised third-party access. Our security measures are continuously improved in accordance with technological developments.

Status: August 2019