The company

KASTENS & KNAUER

A metal trading company since 1977 with more than 150 employees at seven locations today.

• Aluminium and semi-finished metal products
• Sawing and cutting centre
• Manufacturer of aluminium cast plates with the protected brands
   CST®
   KuKPlan CST-M®
   Eloxcast®
   Cyclecast®
   CST-7X®
• Certified and approved stockist for Aerospace materials
• Reseller business and service
• CNC manufacturing

Contact:

KASTENS & KNAUER
GmbH & Co INTERNATIONAL KG

Hilligenwarf 9
28865 Lilienthal

Germany

Telephone: +49 4298 - 9321 0
E-Mail: info@kastens-knauer.de

Keyfacts

Relaible

You get everything from a single source, on time and without long distances.

Competent

Thanks to our well-trained employees and many years of experience in storing, cutting and processing metal.

Fast

We have the metal in stock and can saw, cut and pick for you quickly and flexibly.

Certified

• EN ISO 9001
• EN ISO 9120
• TÜV-approval stamping
• CE test mark authorised to be issued

Sustainable

ESG certification EcoZert since 2022. Resource-saving operational processes. Almost 70% of electricity is generated from renewable sources and a large part of the car fleet is electric or plug-in hybrid. We encourage our employees to reduce their carbon footprint through company bicycle leasing.

Innovative

We work with state-of-the-art machinery and the latest technology in the areas of ERP, warehouse management and sawing technology.

Well stocked

We store up to 5,000 tonnes of semi-finished metal products in six fully automated high-bay racking systems in our central warehouse. The high-bay racking systems and all upstream and downstream processes are networked with each other via a modern ERP system.

Already on the way

With our truck logistics, we deliver your goods quickly and safely to their destination.

Social commitment and sustainability

The company and its employees are committed to society in a variety of ways. For example, through voluntary work in charitable organizations or institutions. We support this, for example, by giving time off to the volunteer fire brigade and THW and making financial donations to local organizations such as the food bank and the youth fire brigade, or by annually reforesting trees in the southern Harz region on behalf of our customers.


A health day for all employees is held regularly in autumn. Together with the health insurance companies, the company medical service and the employers' liability insurance association, the focus is on occupational safety and preventive healthcare.


We have been taking part in the Future Day for many years. Many children of our employees or their friends have been able to gain an impression of the company over the years. 

Focus on sustainability

As part of our ESG certification, all aspects of sustainable trade within the company are reviewed annually. 

As many employees live close to the company, we promote the switch to bicycles with appropriate business bike programme and encourage participation in campaigns such as ‘City Cycling’.

We were the first dealer in Germany to establish the recycling of EN-AW 5083 and EN-AW 5754 scrap with our customers.
The swarf briquettes and scrap pieces from our customers are collected in our own containers, then returned to the foundry as secondary material for melting down.

Among other things, this saves almost 95% of the energy required compared to primary aluminum. As the scrap is unmixed, no alloying components, such as magnesium, have to be used.

Contact:

KASTENS & KNAUER
GmbH & Co INTERNATIONAL KG

Hilligenwarf 9
28865 Lilienthal
Germany

Telephone: +49 4298 - 9321 0
E-Mail: info@kastens-knauer.de