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EN 1.4404 Stainless Steel vs. Grade 7 Titanium

EN 1.4404 stainless steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4404 stainless steel and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
150
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 14 to 43
24
Fatigue Strength, MPa 220 to 320
250
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
38
Shear Strength, MPa 420 to 550
270
Tensile Strength: Ultimate (UTS), MPa 600 to 900
420
Tensile Strength: Yield (Proof), MPa 240 to 570
340

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 950
320
Melting Completion (Liquidus), °C 1440
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 16
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 3.8
47
Embodied Energy, MJ/kg 52
800
Embodied Water, L/kg 150
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
95
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 21 to 32
26
Strength to Weight: Bending, points 20 to 26
28
Thermal Diffusivity, mm2/s 4.0
8.9
Thermal Shock Resistance, points 13 to 20
31

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 62.8 to 71.5
0 to 0.3
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 13
0
Nitrogen (N), % 0 to 0.1
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4