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Strength in numbers

Aluminium Alloy   |   BS-L

L95 T651 Plate

Commercial7075 - OBSOLETE

Applications:
Aircraft and military highly stressed structural components. Rolling stock for machine parts and tools (for rubber and plastics). Screws and bolts, nuts. Rivets. Nuclear applications.

Characteristic Properties:
Heat treatable very high strength alloy with a strength slightly lower than 7010. Very high fatigue strength. Joining preferably by rivets, adhesives or screws. Corrosion protection is recommended also in outdoor atmosphere.

Precautions and Warnings:
Care to be taken when selecting temper (and other thermal treatment) for balance of properties. May be clad with 7072 for better protection against stress corrosion cracking.


Chemical Composition

BS 2L95(1971)
Alloy L95
Chemical Element % Present
Aluminium (Al) balance
Other (Each) 0.05 max
Tin (Sn) 0.05 max
Nickel (Ni) 0.05 max
Lead (Pb) 0.05 max
Others (Total) 0.15 max
Titanium + Zirconium (Ti+Zr) 0.2 max
Chromium (Cr) 0.1 - 0.25
Manganese (Mn) 0.3 max
Silicon (Si) 0.4 max
Iron (Fe) 0.5 max
Copper (Cu) 1.2 - 2
Magnesium (Mg) 2.1 - 2.9
Zinc (Zn) 5.1 - 6.4

Alloy Designations

Aluminium alloy L95 - 7075 is covered by standard BS 2L95 (1971).  BS2L95 (1971) was superseded by  BS EN 2126 on 15 October 1996.


Temper Types

The most common temper for L95 – 7075 aluminium is:

  • T651

Supplied Forms

L93 – 7075 aluminium is supplied in Plate

  • Plate

Generic Physical Properties

Physical Property Value
Density 2.81 g/cm³
Melting Point 635 °C
Thermal Expansion 23.5 x10^-6 /K
Modulus of Elasticity 72 GPa
Thermal Conductivity 134-160 W/m.K
Electrical Resistivity 40 % IACS
'Typical' Physical Properties are given

Mechanical Properties

These Mechanical properties are for Plate in the T651 temper

Thickness (mm) Proof Strength (Min) Tensile Strength (Min) Elongation % (Min)
Over 6 to & incl. 12.5 450 530 8
Over 12.5 up to & incl. 25 450 530 6
Over 25 up to & incl. 40 450 530 5
Over 40 up to & incl. 63 440 510 5
Over 63 up to & incl. 90 410 500 5