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EN 1.4008 Stainless Steel vs. Grade 7 Titanium

EN 1.4008 stainless steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4008 stainless steel and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 17
24
Fatigue Strength, MPa 300
250
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
38
Tensile Strength: Ultimate (UTS), MPa 670
420
Tensile Strength: Yield (Proof), MPa 500
340

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 760
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 25
22
Thermal Expansion, µm/m-K 11
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.1
47
Embodied Energy, MJ/kg 30
800
Embodied Water, L/kg 100
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
95
Resilience: Unit (Modulus of Resilience), kJ/m3 630
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24
26
Strength to Weight: Bending, points 22
28
Thermal Diffusivity, mm2/s 6.7
8.9
Thermal Shock Resistance, points 23
31

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 12 to 13.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 81.8 to 86.8
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0.2 to 0.5
0
Nickel (Ni), % 1.0 to 2.0
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4