1.4401 (X5CrNiMo17-12-2) vs 1.4571 (X6CrNiMoTi17-12-2)

1.4571 (X6CrNiMoTi17-12-2) and 1.4401 (X5CrNiMo17-12-2) are about equally stiff. Their densities are about the same. Per unit mass they are about equally stiff (25 and 25 MJ/kg). Strength: f_y = 240 MPa for 1.4401 (X5CrNiMo17-12-2), f_y = 240 MPa for 1.4571 (X6CrNiMoTi17-12-2).

1.4401 (X5CrNiMo17-12-2) EN 1993-1-4 · EN 10088 · t ≤ 8 mm · C 1.4571 (X6CrNiMoTi17-12-2) EN 1993-1-4 · EN 10088 · t ≤ 8 mm · C

Side by side

ratio = 1.4571 (X6CrNiMoTi17-12-2) / 1.4401 (X5CrNiMo17-12-2) · log scale

Property	1.4401 (X5CrNiMo17-12-2)	1.4571 (X6CrNiMoTi17-12-2)	Unit	Ratio
E Young's modulus	200	200	GPa	1×
G Shear modulus	76.92	76.92	GPa	1×
ν Poisson's ratio	0.3	0.3	–	1×
ρ Density	8000	8000	kg/m³	1×
α Coefficient of thermal expansion	16	16.5	10⁻⁶/K	1.03×
λ Thermal conductivity	15	15	W/(m·K)	1×
c_p Specific heat capacity	500	500	J/(kg·K)	1×
ρ_e Electrical resistivity	0.75	0.75	µΩ·m	1×
f_y Yield strength (R_eH / R_p0.2)	240	240	MPa	1×
f_u Tensile strength (R_m)	530	540	MPa	1.02×
E/ρ Specific stiffness E/ρ · derived	25	25	MJ/kg	1×
c₀ Bar wave speed √(E/ρ) · derived	5000	5000	m/s	1×
f/ρ Specific strength f/ρ · derived	30	30	kJ/kg	1×

Values at the first thickness band or product form of each material (EN 1993-1-4 · EN 10088 · t ≤ 8 mm · C; EN 1993-1-4 · EN 10088 · t ≤ 8 mm · C). 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.