C22 vs C45

C45 is 1.5 times as stiff as C22. It is 1.2 times as dense. Per unit mass C45 is 1.3 times as stiff. Strength: f_m,k = 22 MPa for C22, f_m,k = 45 MPa for C45.

C22 EN 338:2016 C45 EN 338:2016

Side by side

ratio = C45 / C22 · log scale

Property	C22	C45	Unit	Ratio
E₁ Modulus, direction 1	10	15	GPa	1.5×
E₂ Modulus, direction 2	0.33	0.5	GPa	1.52×
E₃ Modulus, direction 3	0.33	0.5	GPa	1.52×
G₁₂ Shear modulus 1-2	0.63	0.94	GPa	1.49×
G₁₃ Shear modulus 1-3	0.63	0.94	GPa	1.49×
E₀,₀₅ Modulus parallel to grain, 5 % fractile	6.7	10.1	GPa	1.51×
ρ Density	410	490	kg/m³	1.2×
ρ_k Density, characteristic (5 % fractile)	340	410	kg/m³	1.21×
f_m,k Bending strength	22	45	MPa	2.05×
f_t,0,k Tension parallel to grain	13	30	MPa	2.31×
f_t,90,k Tension perpendicular to grain	0.4	0.4	MPa	1×
f_c,0,k Compression parallel to grain	20	29	MPa	1.45×
f_c,90,k Compression perpendicular to grain	2.4	2.9	MPa	1.21×
f_v,k Shear strength	3.8	4	MPa	1.05×
E/ρ Specific stiffness E/ρ · derived	24.39	30.61	MJ/kg	1.26×
c₀ Bar wave speed √(E/ρ) · derived	4939	5533	m/s	1.12×
f/ρ Specific strength f/ρ · derived	53.66	91.84	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.