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Security steels


The lightweight security steel for ultra-high requirements

Our DIFENDER special steel is your best choice when you need to meet ultra-high security requirements with the minimum of weight. DIFENDER protects civilian and military armoured land vehicles and water craft, cash transporters and buildings against ballistic and explosive attack.


  • excellent resistance against bullet, blast waves impact and splittering in combination with high hardness, strength and low weight
  • large product range with narrow hardness gradation like 270, 300, 350, 400, 450, 500, 550 and 600 HBW
  • quality for warm press hardening such as DIFENDER 600 PH
  • good impact values (longitudinal and transverse) at -40 °C
  • thickenesses up to 150 mm
  • thickness tolerances: -0/+0.8 mm
  • restricted flatness tolerances acc. tab. 5 EN 10029
  • specific testing on mother plate with 3.1 material test report
  • very good processing properties
  • approvals i.e. according to the German Army standard TL 2350-0000

The distribution of DIFENDER is done via direct sales or specialized Steel Service Centers, even small orders.

Proprietary steels


Contact persons


Christoph Dickmann
Head of Sales Department, Machinery & Construction Equipment, Protection Steel

Phone: +49 6831 472385
Fax: +49 6831 47992681


Dr. Axel Grüneklee
Category Manager Sales, Protection Steel

Phone: +49 6831 475791


Johannes Klemm
Head of Marketing & Technical Support, Machinery & Construction Equipment, Steel Service Center, Plate Processing, Protection Steel

Phone: +49 6831 475658
Fax: +49 6831 47999036