D27 vs D45

D45 is 1.3 times as stiff as D27. It is 1.1 times as dense. Per unit mass D45 is 1.1 times as stiff. Strength: f_m,k = 27 MPa for D27, f_m,k = 45 MPa for D45.

D27 EN 338:2016 D45 EN 338:2016

Side by side

ratio = D45 / D27 · log scale

Property	D27	D45	Unit	Ratio
E₁ Modulus, direction 1	10.5	13.5	GPa	1.29×
E₂ Modulus, direction 2	0.7	0.9	GPa	1.29×
E₃ Modulus, direction 3	0.7	0.9	GPa	1.29×
G₁₂ Shear modulus 1-2	0.66	0.84	GPa	1.27×
G₁₃ Shear modulus 1-3	0.66	0.84	GPa	1.27×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	8.8	11.3	GPa	1.28×
ρ Density	610	700	kg/m³	1.15×
ρ_k Density, characteristic (5 % fractile)	510	580	kg/m³	1.14×
f_m,k Bending strength	27	45	MPa	1.67×
f_t,0,k Tension parallel to grain	16	27	MPa	1.69×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	22	29	MPa	1.32×
f_c,90,k Compression perpendicular to grain	5.1	5.8	MPa	1.14×
f_v,k Shear strength	3.8	4.4	MPa	1.16×
E/ρ Specific stiffness E/ρ · derived	17.21	19.29	MJ/kg	1.12×
c₀ Bar wave speed √(E/ρ) · derived	4149	4392	m/s	1.06×
f/ρ Specific strength f/ρ · derived	44.26	64.29	kJ/kg	1.45×

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.