Technology at alutec

Cold impact extrusion is our core competence. Here, various aluminium alloys and ultra-pure aluminium are used as materials. Due to more than three decades of experience, the company is strongly influenced by forming technology.

In the course of time, however, some complementary processes of other technology areas were integrated.

The forming process can be followed by punching as well as mechanical finishing fully automated.

Cold impact extrusion

The supreme discipline of cold massive forming

The cold impact extrusion technique converts the input volume of the raw material almost 1:1 into a molded part produced by pressing.


Impact extrusion at alutec

In cold impact extrusion, an aluminum slug is placed in the die of the tool at room temperature. A steel punch is then pressed onto the slug with up to 1500 MPa, which is plastically deformed. The aluminum flows through openings on the punch and die and takes on a shape determined by the shape of the tool.

The following is possible:


Rectangular / circular cross sections


Diameter from Ø3.0 mm to approx. Ø 150.0 mm


Wall thicknesses from 0.1 mm upwards


Heights up to ten times the diameter


Mounted and inserted bars


Pressing process in fractions of a second


Work-hardening in the part


Extensive automation


Smooth surfaces and high dimensional accuracy

Punching and mechanical finishing

Complex products and unusual dimensions?

Cold impact extrusion can be effectively combined with other technologies. Stamping technology and machining production processes are complementary processes that can be fully automated.


Pure aluminium, alloy or copper?

No matter what you choose.
We are happy to advise you and find the right one for you and your product!


… and its advantages

The almost 100% reusability through recycling to equivalent source material contributes greatly to the conservation of resources.

Right from the start, 60% of the energy required for the production of primary aluminum is generated from hydropower.

The energy required for secondary aluminum production is only 5% of the original energy input.

The reduction in weight enables energy savings, especially in vehicle construction (aluminium has only 1/3 of the weight of steel). 10% weight reduction means about 6% fuel reduction.

The application possibilities: From the can – 2006 were produced world-wide approximately beverage cans and of it 80% in aluminum (Europe 41 billion and/or 66%) – to the heat sink, from the foil to the furniture element. Today there are almost no areas in which aluminium is not used.

Aluminium – An indispensable Partner!

Wrought alloys


Al 10,5









Natural hard materials


Al99,5 ( EN-AW 1050) strength after cold impact extrusion approx. 120 N/mm²


AlMn1 ( EN-AW 3103) strength after cold impact extrusion approx. 130 N/mm²

Heat treatable alloys


AlMgSi0,5 (ENAW 6060) strength after cold impact extrusion approx. 180 N/mm² → after hardening process approx. 220N/mm²


AlMgSi1 (ENAW 6082) strength after cold impact extrusion approx. 220 N/mm² →after hardening process approx. 310N/mm²