D55 vs D60

D60 is 1.1 times as stiff as D55. Their densities are about the same. Per unit mass they are about equally stiff (19.62 and 20.24 MJ/kg). Strength: f_m,k = 55 MPa for D55, f_m,k = 60 MPa for D60.

D55 EN 338:2016 D60 EN 338:2016

Side by side

ratio = D60 / D55 · log scale

Property	D55	D60	Unit	Ratio
E₁ Modulus, direction 1	15.5	17	GPa	1.1×
E₂ Modulus, direction 2	1.03	1.13	GPa	1.1×
E₃ Modulus, direction 3	1.03	1.13	GPa	1.1×
G₁₂ Shear modulus 1-2	0.97	1.06	GPa	1.09×
G₁₃ Shear modulus 1-3	0.97	1.06	GPa	1.09×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	13	14.3	GPa	1.1×
ρ Density	790	840	kg/m³	1.06×
ρ_k Density, characteristic (5 % fractile)	660	700	kg/m³	1.06×
f_m,k Bending strength	55	60	MPa	1.09×
f_t,0,k Tension parallel to grain	33	36	MPa	1.09×
f_t,90,k Tension perpendicular to grain	0.6	0.6	MPa	1×
f_c,0,k Compression parallel to grain	32	33	MPa	1.03×
f_c,90,k Compression perpendicular to grain	6.6	10.5	MPa	1.59×
f_v,k Shear strength	4.7	4.8	MPa	1.02×
E/ρ Specific stiffness E/ρ · derived	19.62	20.24	MJ/kg	1.03×
c₀ Bar wave speed √(E/ρ) · derived	4429	4499	m/s	1.02×
f/ρ Specific strength f/ρ · derived	69.62	71.43	kJ/kg	1.03×

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.