D27 vs D75

D75 is about twice as stiff as D27. It is 1.7 times as dense. Per unit mass D75 is 1.3 times as stiff. Strength: f_m,k = 27 MPa for D27, f_m,k = 75 MPa for D75.

D27 EN 338:2016 D75 EN 338:2016

Side by side

ratio = D75 / D27 · log scale

Property	D27	D75	Unit	Ratio
E₁ Modulus, direction 1	10.5	22	GPa	2.1×
E₂ Modulus, direction 2	0.7	1.47	GPa	2.1×
E₃ Modulus, direction 3	0.7	1.47	GPa	2.1×
G₁₂ Shear modulus 1-2	0.66	1.38	GPa	2.09×
G₁₃ Shear modulus 1-3	0.66	1.38	GPa	2.09×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	8.8	18.5	GPa	2.1×
ρ Density	610	1020	kg/m³	1.67×
ρ_k Density, characteristic (5 % fractile)	510	850	kg/m³	1.67×
f_m,k Bending strength	27	75	MPa	2.78×
f_t,0,k Tension parallel to grain	16	45	MPa	2.81×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	22	37	MPa	1.68×
f_c,90,k Compression perpendicular to grain	5.1	12.8	MPa	2.51×
f_v,k Shear strength	3.8	5	MPa	1.32×
E/ρ Specific stiffness E/ρ · derived	17.21	21.57	MJ/kg	1.25×
c₀ Bar wave speed √(E/ρ) · derived	4149	4644	m/s	1.12×
f/ρ Specific strength f/ρ · derived	44.26	73.53	kJ/kg	1.66×

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.