C16 vs C30

C30 is 1.5 times as stiff as C16. It is 1.2 times as dense. Per unit mass C30 is 1.2 times as stiff. Strength: f_m,k = 16 MPa for C16, f_m,k = 30 MPa for C30.

C16 EN 338:2016 C30 EN 338:2016

Side by side

ratio = C30 / C16 · log scale

Property	C16	C30	Unit	Ratio
E₁ Modulus, direction 1	8	12	GPa	1.5×
E₂ Modulus, direction 2	0.27	0.4	GPa	1.48×
E₃ Modulus, direction 3	0.27	0.4	GPa	1.48×
G₁₂ Shear modulus 1-2	0.5	0.75	GPa	1.5×
G₁₃ Shear modulus 1-3	0.5	0.75	GPa	1.5×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	5.4	8	GPa	1.48×
ρ Density	370	460	kg/m³	1.24×
ρ_k Density, characteristic (5 % fractile)	310	380	kg/m³	1.23×
f_m,k Bending strength	16	30	MPa	1.88×
f_t,0,k Tension parallel to grain	8.5	19	MPa	2.24×
f_t,90,k Tension perpendicular to grain	0.4	0.4	MPa	1×
f_c,0,k Compression parallel to grain	17	24	MPa	1.41×
f_c,90,k Compression perpendicular to grain	2.2	2.7	MPa	1.23×
f_v,k Shear strength	3.2	4	MPa	1.25×
E/ρ Specific stiffness E/ρ · derived	21.62	26.09	MJ/kg	1.21×
c₀ Bar wave speed √(E/ρ) · derived	4650	5108	m/s	1.1×
f/ρ Specific strength f/ρ · derived	43.24	65.22	kJ/kg	1.51×

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.