C14 vs C50

C50 is 2.3 times as stiff as C14. It is 1.5 times as dense. Per unit mass C50 is 1.5 times as stiff. Strength: f_m,k = 14 MPa for C14, f_m,k = 50 MPa for C50.

C14 EN 338:2016 C50 EN 338:2016

Side by side

ratio = C50 / C14 · log scale

Property	C14	C50	Unit	Ratio
E₁ Modulus, direction 1	7	16	GPa	2.29×
E₂ Modulus, direction 2	0.23	0.53	GPa	2.3×
E₃ Modulus, direction 3	0.23	0.53	GPa	2.3×
G₁₂ Shear modulus 1-2	0.44	1	GPa	2.27×
G₁₃ Shear modulus 1-3	0.44	1	GPa	2.27×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	4.7	10.7	GPa	2.28×
ρ Density	350	520	kg/m³	1.49×
ρ_k Density, characteristic (5 % fractile)	290	430	kg/m³	1.48×
f_m,k Bending strength	14	50	MPa	3.57×
f_t,0,k Tension parallel to grain	7.2	33.5	MPa	4.65×
f_t,90,k Tension perpendicular to grain	0.4	0.4	MPa	1×
f_c,0,k Compression parallel to grain	16	30	MPa	1.88×
f_c,90,k Compression perpendicular to grain	2	3	MPa	1.5×
f_v,k Shear strength	3	4	MPa	1.33×
E/ρ Specific stiffness E/ρ · derived	20	30.77	MJ/kg	1.54×
c₀ Bar wave speed √(E/ρ) · derived	4472	5547	m/s	1.24×
f/ρ Specific strength f/ρ · derived	40	96.15	kJ/kg	2.4×

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.