7178

EN AW / AlZn7MgCu / 7178 / T76510 / T76511

Chemical Properties % Value
Silicon (Si)0,00 - 0,40
Chromium (Cr)0,18 - 0,28
Manganese (Mn)0,00 - 0,30
Magnesium (Mg)2,40 - 3,10
Copper (Cu)1,60 - 2,40
Titanium (Ti)0,00 - 0,20
Iron (Fe)0,00 - 0,50
Zinc (Zn)6,30 - 7,30
Aluminium (Al)Balance
Physical Properties Value
Density2,83 g/cm³
Melting Point477 °C
Thermal Expansion23.5 x 10^-6 /K
Modulus of Elasticity%10
Thermal Conductivity140 W/m.K
Mechanical Properties Value
Proof Strength480 MPa
Yield Strength550 MPa
Shear Strength340 MPa
Elongation A50 mm%9
Modulus of Elasticity72 GPa
7178 aluminum is a strong, high strength material having moderate temperature applications. This alloy was intended primarily for advanced subsonic aircraft applications.

 

ALLOY DESIGNATIONS
EN AW 7178 has similarities to the following standard designations and specifications ;

Alloy 7178, UNS A97178, ASTM B209

DIN AlZn7MgCu

 

TEMPER TYPES

7178 is supplied in a wide range of tempers:
 
  • O - Soft
  • T6 - Solution heat-treated and then artificially aged.
  • T6510 - Solution heat-treated, stress-relieved by controlled stretching (permanent set 1% to 3% for extruded rod, bar, shapes and tube, 0.5% to 3% for drawn tube) and then artificially aged. The products receive no further straightening after stretching.
  • T6511 - Same as T6510 except that minor straightening is allowed after stretching to comply with standard tolerances
  • T76 - Solution heat-treated and then artificially overaged in order to achieve a good exfoliation corrosion resistance.
  • T7651 - Solution heat-treated, stress-relieved by controlled stretching (permanent set 1% to 3% for extruded rod, bar, shapes and tube, 0.5% to 3% for drawn tube) and then artificially overaged in order to achieve a good exfoli-ation corrosion resistance. The products receive no further straightening after stretching.
  • T76510 - Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged in order to achieve a good exfoli-ation corrosion resistance. The products receive no further straightening after stretching.
  • T76511 - Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged in order to achieve a good exfoli-ation corrosion resistance. The products receive no further straightening after stretching except that minor straightening is allowed after stretching to comply with standard tolerances.
 
 
SUPPLIED FORMS
7178 is supplied in plate, sheet and extrusions.
  • Plate
  • Sheet
  • Tube / Extrusions
DELIVERY: