Cast iron

Metal casting technology has been used for more than 5000 years toproduce components with geometric shapes. The methods have been constantly improved so that today, highly-demanding, complex cast parts can be produced for a wide variety of applications. From filigree, thin-walled components through to complexcomponents weighing several tons. Apart from the wide variety of shapes, cast iron also offers the possibility of producing complex shapes from a highly-resistant material. Apart from the outstanding mechanical properties with a maximumservice life, the material is 100 percent recyclable without any loss of its properties.

Cast materials are split into two groups: cast iron materials and non-ferrous metal cast materials. We have concentrated on cast iron materials so that we can place our specific competence and experience at your disposal.

Cast iron is an iron-carbonalloy with a carbon content of more than 2.06%. A differentiation is made within the alloys between three type of cast iron that can be chosen to fit the application depending on the graphite geometry.

Lamellar graphite cast iron (EN 1561, GJL):

The graphite in this casting takes the form of thin, irregularly shaped flakes. The tensile strength of this material is relatively low, but its compressive strength to absorb compression stresses is much better.  The structure offers good sliding properties thanks to the high resistance to friction wear.

Cast iron with vermicular graphite (ISO 16112 GJV):

The graphite in this casting is neither nodular or lamellar but occurs in a worm-shape (vermicular). The mechanical propertiesof this cast iron are between those of cast iron with lamellar graphite and cast iron with nodular graphite. Its manufacture, however, is more complicated

Cast iron with nodular graphite, spheroidal casting (EN 1563 GJS):

The graphite in spheroidal castings occurs as nodules, this being achieved by a desulphurisation of the cast. This type of casting has mechanical properties that are very similar to those of steel. The casting has high strength and expansion values and and good cutting properties.

  • The firm of ZürnTEC Components GmbH with registered offices in Munich was founded as a development partner for the automotive and commercial vehicle sector as well as other other lines of industry.

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