D27 vs D70

D70 is about twice as stiff as D27. It is 1.6 times as dense. Per unit mass D70 is 1.2 times as stiff. Strength: f_m,k = 27 MPa for D27, f_m,k = 70 MPa for D70.

D27 EN 338:2016 D70 EN 338:2016

Side by side

ratio = D70 / D27 · log scale

Property	D27	D70	Unit	Ratio
E₁ Modulus, direction 1	10.5	20	GPa	1.9×
E₂ Modulus, direction 2	0.7	1.33	GPa	1.9×
E₃ Modulus, direction 3	0.7	1.33	GPa	1.9×
G₁₂ Shear modulus 1-2	0.66	1.25	GPa	1.89×
G₁₃ Shear modulus 1-3	0.66	1.25	GPa	1.89×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	8.8	16.8	GPa	1.91×
ρ Density	610	960	kg/m³	1.57×
ρ_k Density, characteristic (5 % fractile)	510	800	kg/m³	1.57×
f_m,k Bending strength	27	70	MPa	2.59×
f_t,0,k Tension parallel to grain	16	42	MPa	2.62×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	22	36	MPa	1.64×
f_c,90,k Compression perpendicular to grain	5.1	12	MPa	2.35×
f_v,k Shear strength	3.8	5	MPa	1.32×
E/ρ Specific stiffness E/ρ · derived	17.21	20.83	MJ/kg	1.21×
c₀ Bar wave speed √(E/ρ) · derived	4149	4564	m/s	1.1×
f/ρ Specific strength f/ρ · derived	44.26	72.92	kJ/kg	1.65×

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.