C22 vs C30
C30 is 1.2 times as stiff as C22. It is 1.1 times as dense. Per unit mass they are about equally stiff (24.39 and 26.09 MJ/kg). Strength: f_m,k = 22 MPa for C22, f_m,k = 30 MPa for C30.
Side by side
ratio = C30 / C22 · log scale| Property | C22 | C30 | Unit | Ratio | ¼×1×4× |
|---|---|---|---|---|---|
| E₁ Modulus, direction 1 | 10 | 12 | GPa | 1.2× | |
| E₂ Modulus, direction 2 | 0.33 | 0.4 | GPa | 1.21× | |
| E₃ Modulus, direction 3 | 0.33 | 0.4 | GPa | 1.21× | |
| G₁₂ Shear modulus 1-2 | 0.63 | 0.75 | GPa | 1.19× | |
| G₁₃ Shear modulus 1-3 | 0.63 | 0.75 | GPa | 1.19× | |
| E₀,₀₅ Modulus parallel to grain, 5 % fractile | 6.7 | 8 | GPa | 1.19× | |
| ρ Density | 410 | 460 | kg/m³ | 1.12× | |
| ρ_k Density, characteristic (5 % fractile) | 340 | 380 | kg/m³ | 1.12× | |
| f_m,k Bending strength | 22 | 30 | MPa | 1.36× | |
| f_t,0,k Tension parallel to grain | 13 | 19 | MPa | 1.46× | |
| f_t,90,k Tension perpendicular to grain | 0.4 | 0.4 | MPa | 1× | |
| f_c,0,k Compression parallel to grain | 20 | 24 | MPa | 1.2× | |
| f_c,90,k Compression perpendicular to grain | 2.4 | 2.7 | MPa | 1.12× | |
| f_v,k Shear strength | 3.8 | 4 | MPa | 1.05× | |
| E/ρ Specific stiffness E/ρ · derived | 24.39 | 26.09 | MJ/kg | 1.07× | |
| c₀ Bar wave speed √(E/ρ) · derived | 4939 | 5108 | m/s | 1.03× | |
| f/ρ Specific strength f/ρ · derived | 53.66 | 65.22 | kJ/kg | 1.22× |
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.