C30 vs C35
C35 is 1.1 times as stiff as C30. Their densities are about the same. Per unit mass they are about equally stiff (26.09 and 27.66 MJ/kg). Strength: f_m,k = 30 MPa for C30, f_m,k = 35 MPa for C35.
Side by side
ratio = C35 / C30 · log scale| Property | C30 | C35 | Unit | Ratio | ¼×1×4× |
|---|---|---|---|---|---|
| E₁ Modulus, direction 1 | 12 | 13 | GPa | 1.08× | |
| E₂ Modulus, direction 2 | 0.4 | 0.43 | GPa | 1.07× | |
| E₃ Modulus, direction 3 | 0.4 | 0.43 | GPa | 1.07× | |
| G₁₂ Shear modulus 1-2 | 0.75 | 0.81 | GPa | 1.08× | |
| G₁₃ Shear modulus 1-3 | 0.75 | 0.81 | GPa | 1.08× | |
| E₀,₀₅ Modulus parallel to grain, 5 % fractile | 8 | 8.7 | GPa | 1.09× | |
| ρ Density | 460 | 470 | kg/m³ | 1.02× | |
| ρ_k Density, characteristic (5 % fractile) | 380 | 390 | kg/m³ | 1.03× | |
| f_m,k Bending strength | 30 | 35 | MPa | 1.17× | |
| f_t,0,k Tension parallel to grain | 19 | 22.5 | MPa | 1.18× | |
| f_t,90,k Tension perpendicular to grain | 0.4 | 0.4 | MPa | 1× | |
| f_c,0,k Compression parallel to grain | 24 | 25 | MPa | 1.04× | |
| f_c,90,k Compression perpendicular to grain | 2.7 | 2.7 | MPa | 1× | |
| f_v,k Shear strength | 4 | 4 | MPa | 1× | |
| E/ρ Specific stiffness E/ρ · derived | 26.09 | 27.66 | MJ/kg | 1.06× | |
| c₀ Bar wave speed √(E/ρ) · derived | 5108 | 5259 | m/s | 1.03× | |
| f/ρ Specific strength f/ρ · derived | 65.22 | 74.47 | kJ/kg | 1.14× |
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.