C27 vs C50

C50 is 1.4 times as stiff as C27. It is 1.2 times as dense. Per unit mass C50 is 1.2 times as stiff. Strength: f_m,k = 27 MPa for C27, f_m,k = 50 MPa for C50.

C27 EN 338:2016 C50 EN 338:2016

Side by side

ratio = C50 / C27 · log scale

Property	C27	C50	Unit	Ratio
E₁ Modulus, direction 1	11.5	16	GPa	1.39×
E₂ Modulus, direction 2	0.38	0.53	GPa	1.39×
E₃ Modulus, direction 3	0.38	0.53	GPa	1.39×
G₁₂ Shear modulus 1-2	0.72	1	GPa	1.39×
G₁₃ Shear modulus 1-3	0.72	1	GPa	1.39×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	7.7	10.7	GPa	1.39×
ρ Density	430	520	kg/m³	1.21×
ρ_k Density, characteristic (5 % fractile)	360	430	kg/m³	1.19×
f_m,k Bending strength	27	50	MPa	1.85×
f_t,0,k Tension parallel to grain	16.5	33.5	MPa	2.03×
f_t,90,k Tension perpendicular to grain	0.4	0.4	MPa	1×
f_c,0,k Compression parallel to grain	22	30	MPa	1.36×
f_c,90,k Compression perpendicular to grain	2.5	3	MPa	1.2×
f_v,k Shear strength	4	4	MPa	1×
E/ρ Specific stiffness E/ρ · derived	26.74	30.77	MJ/kg	1.15×
c₀ Bar wave speed √(E/ρ) · derived	5171	5547	m/s	1.07×
f/ρ Specific strength f/ρ · derived	62.79	96.15	kJ/kg	1.53×

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.