D24 vs D80

D80 is 2.4 times as stiff as D24. It is about twice as dense. Per unit mass D80 is 1.3 times as stiff. Strength: f_m,k = 24 MPa for D24, f_m,k = 80 MPa for D80.

D24 EN 338:2016 D80 EN 338:2016

Side by side

ratio = D80 / D24 · log scale

Property	D24	D80	Unit	Ratio
E₁ Modulus, direction 1	10	24	GPa	2.4×
E₂ Modulus, direction 2	0.67	1.6	GPa	2.39×
E₃ Modulus, direction 3	0.67	1.6	GPa	2.39×
G₁₂ Shear modulus 1-2	0.63	1.5	GPa	2.38×
G₁₃ Shear modulus 1-3	0.63	1.5	GPa	2.38×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	8.4	20.2	GPa	2.4×
ρ Density	580	1080	kg/m³	1.86×
ρ_k Density, characteristic (5 % fractile)	485	900	kg/m³	1.86×
f_m,k Bending strength	24	80	MPa	3.33×
f_t,0,k Tension parallel to grain	14	48	MPa	3.43×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	21	38	MPa	1.81×
f_c,90,k Compression perpendicular to grain	4.9	13.5	MPa	2.76×
f_v,k Shear strength	3.7	5	MPa	1.35×
E/ρ Specific stiffness E/ρ · derived	17.24	22.22	MJ/kg	1.29×
c₀ Bar wave speed √(E/ρ) · derived	4152	4714	m/s	1.14×
f/ρ Specific strength f/ρ · derived	41.38	74.07	kJ/kg	1.79×

Values at the first thickness band or product form of each material (EN 338:2016; EN 338:2016). 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.