D18 vs D35
D35 is 1.3 times as stiff as D18. It is 1.1 times as dense. Per unit mass D35 is 1.1 times as stiff. Strength: f_m,k = 18 MPa for D18, f_m,k = 35 MPa for D35.
Side by side
ratio = D35 / D18 · log scale| Property | D18 | D35 | Unit | Ratio | ¼×1×4× |
|---|---|---|---|---|---|
| E₁ Modulus, direction 1 | 9.5 | 12 | GPa | 1.26× | |
| E₂ Modulus, direction 2 | 0.63 | 0.8 | GPa | 1.27× | |
| E₃ Modulus, direction 3 | 0.63 | 0.8 | GPa | 1.27× | |
| G₁₂ Shear modulus 1-2 | 0.59 | 0.75 | GPa | 1.27× | |
| G₁₃ Shear modulus 1-3 | 0.59 | 0.75 | GPa | 1.27× | |
| E₀,₀₅ Modulus parallel to grain, 5 % fractile | 8 | 10.1 | GPa | 1.26× | |
| ρ Density | 570 | 650 | kg/m³ | 1.14× | |
| ρ_k Density, characteristic (5 % fractile) | 475 | 540 | kg/m³ | 1.14× | |
| f_m,k Bending strength | 18 | 35 | MPa | 1.94× | |
| f_t,0,k Tension parallel to grain | 11 | 21 | MPa | 1.91× | |
| f_t,90,k Tension perpendicular to grain | 0.6 | 0.6 | MPa | 1× | |
| f_c,0,k Compression parallel to grain | 18 | 25 | MPa | 1.39× | |
| f_c,90,k Compression perpendicular to grain | 4.8 | 5.4 | MPa | 1.12× | |
| f_v,k Shear strength | 3.5 | 4.1 | MPa | 1.17× | |
| E/ρ Specific stiffness E/ρ · derived | 16.67 | 18.46 | MJ/kg | 1.11× | |
| c₀ Bar wave speed √(E/ρ) · derived | 4082 | 4297 | m/s | 1.05× | |
| f/ρ Specific strength f/ρ · derived | 31.58 | 53.85 | kJ/kg | 1.71× |
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.