Steel Division


Alzen® 305 is a white bronze alloy (zinc-copper-aluminum) specially developed by voestalpine. Compared to bronze and other alloys, it is characterized by high wear resistance, excellent sliding properties and the versatile application and machining possibilities. Another - certainly convincing - argument are the excellent emergency running properties.

The advantages at a glance

  • Longer service life and high wear resistance
  • Price advantages due to low specific weight
  • Very good machinability, higher cutting speeds, shorter machining times
  • No heat treatment necessary after machining
  • Very good sliding, running and emergency running properties
  • Better embedding properties
  • Higher thermal conductivity
  • Better damping capacity, therefore quieter
  • Better wettability with lubricants
  • Low friction value largely avoids "stick slip effect
  • Stable price (independent of copper and tin market)

Areas of application

Well-known companies from demanding industries ranging from mechanical engineering, the automotive, construction and stone industries to agriculture and forestry rely on ALZEN® from voestalpine. They use ALZEN® for a wide variety of products. The range extends from rods, bushings, tubes, and sheets to plain bearings, sliding elements, spindle nuts, worm gears, sealing rings, roller bearing cages, and hydraulic parts.


Technically convincing

Choose the material according to your requirements profile:

ALZEN® 305 is offered as a permanent mold material and as a kneading material. The advantages of the individual types are shown in the following table:

Material description
Yield strength
N/mm2 min.
Tensile strength
N/mm2 min.
Elongation at break ASBrinell hardness
HB 10
Fatigue strength
Permanent mold 3054,6≥215≥2905≥85±90
Kneading material 305K12≥70±130

Material description
Max. permissible surface pressure (static) N/mm2Max. permissible surface pressure (dynamic) N/mm2 Max. permissible sliding speed
Coefficient of friction µ with additional lubrication
Permanent mold 305
Kneading material 305K

Material description
Electrical conductivity 
[m/(Ohm mm2)]
Coefficient of expansion 
[mm/°C] 20 - 200°]
Peak Temperature  °C
Permanent mold 305
18,426 x 10-6100
Kneading material 305K19,0

Best service all the time

We deliver quality! 

From raw material to ready-to-install part - voestalpine Camtec delivers highest quality, fast and reliable, exactly according to your requirements.

ALZEN® raw materialPre-machined partsReady-to-install parts
  • As bars, bushings or sheets

  • Cut to length with machining allowances
  • e.g. with thread
  • According to customer drawing
  • With tightest tolerances  

Machining options

The excellent machinability compared to Cu-based bearing metals is a particular advantage. ALZEN® is very well suited for the following machining operations:

  • Sawing
  • Milling
  • Gear cutting
  • drilling
  • Bright turning
  • Polishing
  • Gluing
  • Soldering
  • Reaming
  • Pulling in
  • Pressing in and on
  • Shrinking on
  • Coating

Application notes

  • The mating material should be at least 15 HRC harder
  • Grease or oil well during assembly - no special oils or greases are required
  • The installation clearance must be adapted to the operating conditions
  • No rusting
  • Can only be used to a limited extent under the influence of chemically aggressive media

Contact Person

Foundry products

ALZEN® 305, ALZEN® 305 K white bronze

ALZEN® 305, ALZEN® 305 K white bronze

ALZEN® alloys are in high demand in the mechanical engineering industry.

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ALZEN® 305, ALZEN® 305 K white bronze

Developed by voestalpine Camtec GmbH, ALZEN® 305  ZnAlCu alloys demonstrate excellent sliding properties. They are predominantly found in mechanical engineering applications.

Our portfolio

  • Bushings
  • Rods
  • Wear plates
  • Rolled plates

Advantages of ALZEN®  

  • Lower specific weight, price advantages 
  • Shortened machining time based on higher cutting speeds 
  • Very good run and emergency run properties 
  • Improved embedding capacity 
  • Improved wettability with lubricants 
  • Higher thermal conductivity 
  • Improved damping capacity 
  • Lower friction value 
  • Long service life 
  • Stable pricing