G.AL® C250

Medium Strength Precision Milled Plate G.AL® C250

Alloy EN AW 5083 [AlMg4,5Mn0,7]
Type of Alloy non heat-treatable
Temper O3
Surface two surfaces precision milled, roughness Ra 0.4 µm, foiled on both sides

The two sides precision machined G.AL® C250 precision plate with protective foil was developed from almost universally-applicable alloy EN AW 5083 (AlMg4.5Mn0.7). Rolling ingots are used for production, which have a fine-grained, homogeneous structure with only low microporosity created in a modified casting process and specific heat treatments. The result is precision plates which are distinguished by very uniform flatness, high strength and good technical anodizing properties.

Special features

  • Very uniform flatness
  • Extremely low residual stress
  • Very good corrosion resistance
  • Very good homogeneity
  • Very precise surface


Datasheet G.AL C250
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G.AL C250 Präzisionsgussplatten zur Herstellung eine Lehre


Thanks to excellent flatness and very narrow tolerances, gauges of all kinds can be realized with G.AL® C250 and put into use within a very short time.

G.AL C250 Präzisionsgussplatten im Vorrichtungsbau

Fixture construction

Elaborate thickness processing is completely eliminated when using G.AL® C250. Due to the excellent corrosion resistance, a material mix normally does not damage the metal.

G.AL C250 precision machined aluminum cast plate for applications in the packaging industry

Packaging industry

The excellent technical anodizing capability of G.AL® C250 allows this material to be used in a variety of applications as base and support plates in plant areas where visual demands are only conditionally required.

G.AL C250 precision machined aluminum cast plate for applications of the automation technology

Automation technology

Even rotary indexing tables with a diameter of up to 85.0 in. and coordinate plates can be produced easily without distortion with the extremely low-stress, flat and parallel G.AL® C250.

G.AL C250 Präzisionsgussplatten für diverse Teile im Maschinenbau

Mechanical engineering / Special machine engineering

Base and ground plates, side and back walls can be realised safely and economically in a short amount of time with G.AL® C250, even at high degrees of machining and with intricate contours.

G.AL C250 Präzisionsgussplatten eignen sich sehr gut als Grundplatten im Modell- und Formenbau

Model and mould-making

For applications as mounting and model base plates, G.AL® C250 is the perfect choice due to its narrow tolerance regarding flatness, parallelism, thickness and good strength.

Expert tip

To avoid any unwanted surprises when removing the protective film from the precision plates, they must never be exposed to sunlight. The natural rubber adhesive of the film is not UV resistant and becomes brittle within a short time, and the protective film can then only be removed with great effort.

Wolf Nawratil, Technical Product Manager, GLEICH Aluminium
Wolf Nawratil, technical product manager, GLEICH Aluminium

G.AL® is a registered trademark of GLEICH Aluminium GmbH, Kaltenkirchen, Germany

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G.AL® C330

The higher-strength G.AL C330 precision machined plate can be used for a variety of applications wich require excellent dimensional stability.

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