C18 vs C24
C24 is 1.2 times as stiff as C18. It is 1.1 times as dense. Per unit mass C24 is 1.1 times as stiff. Strength: f_m,k = 18 MPa for C18, f_m,k = 24 MPa for C24.
Side by side
ratio = C24 / C18 · log scale| Property | C18 | C24 | Unit | Ratio | ¼×1×4× |
|---|---|---|---|---|---|
| E₁ Modulus, direction 1 | 9 | 11 | GPa | 1.22× | |
| E₂ Modulus, direction 2 | 0.3 | 0.37 | GPa | 1.23× | |
| E₃ Modulus, direction 3 | 0.3 | 0.37 | GPa | 1.23× | |
| G₁₂ Shear modulus 1-2 | 0.56 | 0.69 | GPa | 1.23× | |
| G₁₃ Shear modulus 1-3 | 0.56 | 0.69 | GPa | 1.23× | |
| E₀,₀₅ Modulus parallel to grain, 5 % fractile | 6 | 7.4 | GPa | 1.23× | |
| ρ Density | 380 | 420 | kg/m³ | 1.11× | |
| ρ_k Density, characteristic (5 % fractile) | 320 | 350 | kg/m³ | 1.09× | |
| f_m,k Bending strength | 18 | 24 | MPa | 1.33× | |
| f_t,0,k Tension parallel to grain | 10 | 14.5 | MPa | 1.45× | |
| f_t,90,k Tension perpendicular to grain | 0.4 | 0.4 | MPa | 1× | |
| f_c,0,k Compression parallel to grain | 18 | 21 | MPa | 1.17× | |
| f_c,90,k Compression perpendicular to grain | 2.2 | 2.5 | MPa | 1.14× | |
| f_v,k Shear strength | 3.4 | 4 | MPa | 1.18× | |
| E/ρ Specific stiffness E/ρ · derived | 23.68 | 26.19 | MJ/kg | 1.11× | |
| c₀ Bar wave speed √(E/ρ) · derived | 4867 | 5118 | m/s | 1.05× | |
| f/ρ Specific strength f/ρ · derived | 47.37 | 57.14 | kJ/kg | 1.21× |
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.