D45 vs D75

D75 is 1.6 times as stiff as D45. It is 1.5 times as dense. Per unit mass D75 is 1.1 times as stiff. Strength: f_m,k = 45 MPa for D45, f_m,k = 75 MPa for D75.

D45 EN 338:2016 D75 EN 338:2016

Side by side

ratio = D75 / D45 · log scale

Property	D45	D75	Unit	Ratio
E₁ Modulus, direction 1	13.5	22	GPa	1.63×
E₂ Modulus, direction 2	0.9	1.47	GPa	1.63×
E₃ Modulus, direction 3	0.9	1.47	GPa	1.63×
G₁₂ Shear modulus 1-2	0.84	1.38	GPa	1.64×
G₁₃ Shear modulus 1-3	0.84	1.38	GPa	1.64×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	11.3	18.5	GPa	1.64×
ρ Density	700	1020	kg/m³	1.46×
ρ_k Density, characteristic (5 % fractile)	580	850	kg/m³	1.47×
f_m,k Bending strength	45	75	MPa	1.67×
f_t,0,k Tension parallel to grain	27	45	MPa	1.67×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	29	37	MPa	1.28×
f_c,90,k Compression perpendicular to grain	5.8	12.8	MPa	2.21×
f_v,k Shear strength	4.4	5	MPa	1.14×
E/ρ Specific stiffness E/ρ · derived	19.29	21.57	MJ/kg	1.12×
c₀ Bar wave speed √(E/ρ) · derived	4392	4644	m/s	1.06×
f/ρ Specific strength f/ρ · derived	64.29	73.53	kJ/kg	1.14×

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.