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7050

AMS 4201 / AlZn6CuMgZr / 7050 / T7651

Chemical Properties % Value
Silicon (Si)0,00 - 0,12
Tin (Sn)0,00 - 0,00
Chromium (Cr)0,00 - 0,04
Manganese (Mn)0,00 - 0,10
Magnesium (Mg)1,90 - 2,60
Copper (Cu)2,00 - 2,60
Lead (Pb)0,00 - 0,00
Titanium (Ti)0,08 - 0,21
Iron (Fe)0,00 - 0,15
Zinc (Zn)5,70 - 6,70
Nickel (Ni)0,00 - 0,00
Aluminium (Al)Balance
Titanium + Zirconium (Ti+Zr)0,08 - 0,15
Physical Properties Value
Density2,83 g/cm³
Melting Point629 °C
Thermal Expansion23.5 x 10^-6 /K
Modulus of Elasticity71,7 GPa
This alloy is used in aircraft structural parts. The alloy has characteristics of high strength coupled with good resistance to exfoliation and stress corrosion cracking. The alloy also has good fracture toughness and fatigue resistance. Aluminum alloy 7050 is the premier choice for aerospace applications requiring the best combination of strength, stress corrosion cracking (SCC) resistance and toughness.

 

ALLOY DESIGNATIONS
Aluminium alloy AMS 4050, 7050 has similarities to the following standard designations and specifications ;

 

Alloy 7050, UNS A97050, ASTM B209

AlZn6CuMgZr, EN3983

 

TEMPER TYPES

7050 is supplied in a wide range of tempers:
  • T73511 - 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 the best stress corrosion resistance. The products receive no further straightening after stretching, except that minor straightening is allowed after stretching to comply with standard tolerances.
  • T7451 - Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged (between T73 and T76). The products receive no further straightening after stretching.
  • T74511 - Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged (between T73 and T76). The pro-ducts receive no further straightening after stretching, 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.
  • T762 - Solution heat-treated and then artificially overaged in order to achieve a good exfoliation corrosion resistan-ce. Applies to test material heat-treated from annealed or F temper or to products heat-treated from any tem-per by the user.
  • T7651 - Solution heat-treated, stress-relieved by controlled stretching  and then artificially overaged in order to achieve a good exfoliation corrosion resistance. The products recieve 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
7050 is supplied in plate, sheet, bar and extrusions.
  • Plate
  • Sheet
  • Round Bar / Bar
  • Tube / Extrusions
DELIVERY:
Mechanical Properties
Thickness (mm) Proof Strength (Min.) Yield Strength (Min.) Elongation A50 mm %
Over 6.3 up to & incl. 51 441 MPa 510 MPa 9
Over 51 up to & incl. 76 434 MPa 503 MPa 8
Over 76 up to & incl. 102 427 MPa 496 MPa 6
Over 102 up to & incl. 127 421 MPa 490 MPa 5
Over 127 up to & incl. 152 414 MPa 483 MPa 4
Over 152 up to & incl. 178 407 MPa 476 MPa 4
Over 178 up to & incl. 203 400 MPa 469 MPa 4