EN AW-6061 T4 vs EN AW-7020 T6

EN AW-7020 T6 and EN AW-6061 T4 are about equally stiff. Their densities are about the same. Per unit mass they are about equally stiff (25.93 and 25.93 MJ/kg). Strength: f_o = 110 MPa for EN AW-6061 T4, f_o = 290 MPa for EN AW-7020 T6.

EN AW-6061 T4 EN 1999-1-1 · t ≤ 25 mm · EP, ET, ER/B EN AW-7020 T6 EN 1999-1-1 · t ≤ 15 mm · EP, ET, ER/B

Side by side

ratio = EN AW-7020 T6 / EN AW-6061 T4 · log scale

Property	EN AW-6061 T4	EN AW-7020 T6	Unit	Ratio
E Young's modulus	70	70	GPa	1×
G Shear modulus	27	27	GPa	1×
ν Poisson's ratio	0.3	0.3	–	1×
ρ Density	2700	2700	kg/m³	1×
α Coefficient of thermal expansion	23	23	10⁻⁶/K	1×
λ Thermal conductivity	170	—	W/(m·K)	—
σ_e Electrical conductivity	22	—	MS/m	—
f_u Tensile strength (R_m)	180	350	MPa	1.94×
f_o 0.2 % proof strength	110	290	MPa	2.64×
f_o,haz 0.2 % proof strength in the heat-affected zone	95	205	MPa	2.16×
f_u,haz Tensile strength in the heat-affected zone	150	280	MPa	1.87×
E/ρ Specific stiffness E/ρ · derived	25.93	25.93	MJ/kg	1×
c₀ Bar wave speed √(E/ρ) · derived	5092	5092	m/s	1×
f/ρ Specific strength f/ρ · derived	40.74	107.4	kJ/kg	2.64×

Values at the first thickness band or product form of each material (EN 1999-1-1 · t ≤ 25 mm · EP, ET, ER/B; EN 1999-1-1 · t ≤ 15 mm · EP, ET, ER/B). A minimum and a characteristic value are not the same kind of number — read the ratio as a guide. Each material's page lists every band and every source.