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7075

AMS 4166 / AlZn5.5MgCu / 7075 / T73

Chemical Properties % Value
Silicon (Si)0,00 - 0,40
Chromium (Cr)0,18 - 0,28
Manganese (Mn)0,00 - 0,30
Magnesium (Mg)2,10 - 2,90
Copper (Cu)1,20 - 2,00
Titanium (Ti)0,00 - 0,20
Iron (Fe)0,00 - 0,50
Zinc (Zn)5,10 - 6,10
Aluminium (Al)Balance
Physical Properties Value
Density2.81 g/cm³
Melting Point477°C
Thermal Expansion23.4 µm/m.°C
Modulus of Elasticity72 GPa
Thermal Conductivity155 W/m.K
Electrical Resistivity33% IACS
Mechanical Properties Value
Proof Strength435 MPa
Yield Strength505 MPa
Shear Strength290 MPa
Elongation A50 mm13%
Hardness130 HB

7075 T6 is an high strength alloy which also exhibits  low stress corrosion cracking resistance, therefore it eventually generated the need of improving the corrosion resistance of 7075 alloy. Thus the 7075 T73 heat treatment - tempering has been developed. While the T73 and especially the T7351 heat treatment - tempering provide very high corrosion resistance, they also provide processing properties with almost perfect precision tolerances without surface distortion in 7075 aluminum. Therefore, it is used a lot in the aviation industry and since the beginning of the 2000s most old machinery / mold companies, especially in the US and Europe, have shifted to start using them as well. Since 2007, Referans Metal has been the pioneering company by producing and supplying 7075 T73  in plate and bar forms for the machine / mold industry in Türkiye for the first time ever. Evaluation of the technical data in such applications by our engineering department  serves great importance in drawing and design processes.

 

ALLOY DESIGNATIONS
 
7075 T73 has similarities to the following standard designations and specifications ;

Sheet and Plate as; 7075 T73, AMS QQ-A-250/12, 

ASTM B209

Extrusion Seamless Pipe, Profile as; 7075 T73, AMS QQ-A-200/11, 

AMS 4166, ASTM B241

BS 2 L160

 

Choosing Factors for 7075 T73:

  • Strength: Fair
  • Machining: Average
  • Weldability: Weak
  • Formability: Low
  • Corrosion Resistance: Good
  • Heat Treating: Yes
 
 
TEMPER TYPES

AMS-W-700/7 7075 is supplied in the following heat treatment types:

  • O
  • T6
  • T73
  • T76 

 

Some Well-Known Applications for 7075 T73:

Sports equipment

Gear equipment

In the production of fixed articulated carrier apparatus

 

 
SUPPLIED FORMS
 
7075 T73 is supplied in plate,sheet and flat and  tube / extrusion / profile  form.
 
  • Plate
  • Sheet
  • Tube / Profile / Extrusions
DELIVERY:
Mechanical Properties
Thickness (mm) Proof Strength (Min.) Yield Strength (Min.) Elongation A50 mm %
over 6.35 up to & incl. 50.8 389 MPa 472 MPa 6.0 - 7.0
over 50.8 up to & incl. 63.5 355 MPa 451 MPa 6
over 63.5 up to & incl. 76.2 334 MPa 437 MPa 6