D45 vs D50

D50 and D45 are about equally stiff. Their densities are about the same. Per unit mass they are about equally stiff (19.29 and 18.92 MJ/kg). Strength: f_m,k = 45 MPa for D45, f_m,k = 50 MPa for D50.

D45 EN 338:2016 D50 EN 338:2016

Side by side

ratio = D50 / D45 · log scale

Property	D45	D50	Unit	Ratio
E₁ Modulus, direction 1	13.5	14	GPa	1.04×
E₂ Modulus, direction 2	0.9	0.93	GPa	1.03×
E₃ Modulus, direction 3	0.9	0.93	GPa	1.03×
G₁₂ Shear modulus 1-2	0.84	0.88	GPa	1.05×
G₁₃ Shear modulus 1-3	0.84	0.88	GPa	1.05×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	11.3	11.8	GPa	1.04×
ρ Density	700	740	kg/m³	1.06×
ρ_k Density, characteristic (5 % fractile)	580	620	kg/m³	1.07×
f_m,k Bending strength	45	50	MPa	1.11×
f_t,0,k Tension parallel to grain	27	30	MPa	1.11×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	29	30	MPa	1.03×
f_c,90,k Compression perpendicular to grain	5.8	6.2	MPa	1.07×
f_v,k Shear strength	4.4	4.5	MPa	1.02×
E/ρ Specific stiffness E/ρ · derived	19.29	18.92	MJ/kg	0.981×
c₀ Bar wave speed √(E/ρ) · derived	4392	4350	m/s	0.99×
f/ρ Specific strength f/ρ · derived	64.29	67.57	kJ/kg	1.05×

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.