C40 vs C50
C50 is 1.1 times as stiff as C40. It is 1.1 times as dense. Per unit mass they are about equally stiff (29.17 and 30.77 MJ/kg). Strength: f_m,k = 40 MPa for C40, f_m,k = 50 MPa for C50.
Side by side
ratio = C50 / C40 · log scale| Property | C40 | C50 | Unit | Ratio | ¼×1×4× |
|---|---|---|---|---|---|
| E₁ Modulus, direction 1 | 14 | 16 | GPa | 1.14× | |
| E₂ Modulus, direction 2 | 0.47 | 0.53 | GPa | 1.13× | |
| E₃ Modulus, direction 3 | 0.47 | 0.53 | GPa | 1.13× | |
| G₁₂ Shear modulus 1-2 | 0.88 | 1 | GPa | 1.14× | |
| G₁₃ Shear modulus 1-3 | 0.88 | 1 | GPa | 1.14× | |
| E₀,₀₅ Modulus parallel to grain, 5 % fractile | 9.4 | 10.7 | GPa | 1.14× | |
| ρ Density | 480 | 520 | kg/m³ | 1.08× | |
| ρ_k Density, characteristic (5 % fractile) | 400 | 430 | kg/m³ | 1.07× | |
| f_m,k Bending strength | 40 | 50 | MPa | 1.25× | |
| f_t,0,k Tension parallel to grain | 26 | 33.5 | MPa | 1.29× | |
| f_t,90,k Tension perpendicular to grain | 0.4 | 0.4 | MPa | 1× | |
| f_c,0,k Compression parallel to grain | 27 | 30 | MPa | 1.11× | |
| f_c,90,k Compression perpendicular to grain | 2.8 | 3 | MPa | 1.07× | |
| f_v,k Shear strength | 4 | 4 | MPa | 1× | |
| E/ρ Specific stiffness E/ρ · derived | 29.17 | 30.77 | MJ/kg | 1.05× | |
| c₀ Bar wave speed √(E/ρ) · derived | 5401 | 5547 | m/s | 1.03× | |
| f/ρ Specific strength f/ρ · derived | 83.33 | 96.15 | kJ/kg | 1.15× |
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.