Aluminum Yield Strength & Tensile Strength

This page provides a complete reference chart of aluminum alloy yield strength and tensile strength for common grades such as 1100, 2024, 6061, 7075, and 356.0. These values help engineers and designers compare mechanical properties of aluminum alloys across different tempers (O, H14, T3, T351, T6, T651).

The yield strength indicates the stress where plastic deformation begins, while the tensile strength represents the maximum stress before fracture. Aluminum’s strength increases via cold working and heat treatment; alloying elements such as copper (Cu), magnesium (Mg), silicon (Si), manganese (Mn), and zinc (Zn) are commonly used. Aluminum generally retains its ductility at low temperatures.

Values below are typical at room temperature and for quick reference only. Always consult material specifications (ASTM/EN) and supplier data sheets for design allowables.

Typical Yield Strength, Tensile Strength, and % Elongation for Common Aluminum Alloys
Material Yield Strength MPa (ksi) Tensile Strength MPa (ksi) % Elong.
Aluminum Alloy 1100 — Annealed (O) 34 (5) 90 (13) 40
Aluminum Alloy 1100 — Strain hardened (H14) 117 (17) 124 (18) 15
Aluminum Alloy 2024 — Annealed (O) 75 (11) 185 (27) 20
Aluminum Alloy 2024 — Heat treated (T3) 345 (50) 485 (70) 18
Aluminum Alloy 2024 — Heat treated (T351) 325 (47) 470 (68) 20
Aluminum Alloy 6061 — Annealed (O) 55 (8) 124 (18) 30
Aluminum Alloy 6061 — Heat treated (T6/T651) 276 (40) 310 (45) 17
Aluminum Alloy 7075 — Annealed (O) 103 (15) 228 (33) 17
Aluminum Alloy 7075 — Heat treated (T6) 505 (73) 572 (83) 11
Aluminum Alloy 356.0 — As cast 124 (18) 164 (24) 6
Aluminum Alloy 356.0 — Heat treated (T6) 164 (24) 228 (33) 3.5

Comparison: 6061-T6 vs 7075-T6 Aluminum Strength

Among high-strength aluminum alloys, 7075-T6 has one of the highest yield strengths (~505 MPa) and tensile strengths (~572 MPa), making it ideal for aerospace and high-performance applications. In contrast, 6061-T6 offers lower strength (~310 MPa tensile) but higher corrosion resistance and better weldability, which makes it popular in structural and automotive components.

Related aluminum properties

FAQ: Aluminum Strength

What is the yield strength of 6061-T6 aluminum?

The typical yield strength of 6061-T6 aluminum is about 276 MPa (40 ksi).

Which aluminum alloy is the strongest?

Among commonly used alloys, 7075-T6 is one of the strongest, with tensile strength around 572 MPa (83 ksi).

Does aluminum lose strength at low temperature?

No, aluminum retains its ductility and does not become brittle at low temperatures.

Reference