D24 vs D27

D27 and D24 are about equally stiff. Their densities are about the same. Per unit mass they are about equally stiff (17.24 and 17.21 MJ/kg). Strength: f_m,k = 24 MPa for D24, f_m,k = 27 MPa for D27.

D24 EN 338:2016 D27 EN 338:2016

Side by side

ratio = D27 / D24 · log scale

Property	D24	D27	Unit	Ratio
E₁ Modulus, direction 1	10	10.5	GPa	1.05×
E₂ Modulus, direction 2	0.67	0.7	GPa	1.04×
E₃ Modulus, direction 3	0.67	0.7	GPa	1.04×
G₁₂ Shear modulus 1-2	0.63	0.66	GPa	1.05×
G₁₃ Shear modulus 1-3	0.63	0.66	GPa	1.05×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	8.4	8.8	GPa	1.05×
ρ Density	580	610	kg/m³	1.05×
ρ_k Density, characteristic (5 % fractile)	485	510	kg/m³	1.05×
f_m,k Bending strength	24	27	MPa	1.12×
f_t,0,k Tension parallel to grain	14	16	MPa	1.14×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	21	22	MPa	1.05×
f_c,90,k Compression perpendicular to grain	4.9	5.1	MPa	1.04×
f_v,k Shear strength	3.7	3.8	MPa	1.03×
E/ρ Specific stiffness E/ρ · derived	17.24	17.21	MJ/kg	0.998×
c₀ Bar wave speed √(E/ρ) · derived	4152	4149	m/s	0.999×
f/ρ Specific strength f/ρ · derived	41.38	44.26	kJ/kg	1.07×

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.