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G.AL® C330R

high strength –
extremely form stability

Higher Strength, Six-Sides Sawn Plate

Alloy: EN AW-7021 [AlZn5,5Mg1,5]

Type of alloy: heat-treatable

Temper: solution heat treated, quenched & artificially aged, T79

Surface:six-sides sawn, roughness Ra <15 µm

  • low-stress properties
  • very stress-relieved
  • very high strength and hardness
  • available up to 18.9” thickness
  • six-sides sawn surface

The higher-strength aluminum plate G.AL® C330R from alloy EN AW 7021 (AlZn5.5Mg1.5) with material temper T79 sawn on all sides is characterized by very high strength and hardness as well as very good low-stress properties. The very low strength and hardness decrease from the plate’s edge to the center makes G.AL® C330R a superior material in virtually all industrial and manufacturing sectors.



Tool making

More highly-loaded components such as tool changers (revolver magazine) for turning machines are one of the classic applications of G.AL® C330R due to its good strength.

Mold making

The high thermal conductivity of G.AL® C330R makes for short cycle times in foaming, blowing, deep drawing, RIM and injection molds (low and medium pressure).


In highly-loaded components such as jigs and swivel devices, G.AL® C330R frequently replaces high- and ultra-high-strength rolled plates characterised by extreme residual stresses.

Mechanical engineering and special machine engineering

With G.AL® C330R, holders, clamping devices, etc., even with very high degrees of machining, can be produced quickly and safely due to the very good machinability and dimensional stability.

Handling machines

Tool and component carriers are preferably made of low-stress and wear-resistant Al materials. G.AL® C330R fulfills these requirements completely.

Thermal stresses

High-strength aluminum alloys tend to undergo irreversible loss of strength and structural changes in continuous operating temperatures above 190 °F. G.AL® C330R can be used permanently at 250 °F and for short periods (4 – 6 h) up to 280 °F without suffering damage. The material can even withstand temperatures up to 320 °F for 1 – 2 h.

All high-alloyed materials are very sensitive to contact corrosion, especially when steel, copper, brass or bronze was previously used on the CNC machines. In most cases, then there is also a pH value of well above 8.5. To avoid contact corrosion, the components should be taken off the machine immediately after machining and thoroughly cleaned and dried.

Sven Flaake

Technical Product Manager, GLEICH Aluminium

Any further questions?