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EN 1.4401 Stainless Steel vs. Grade 38 Titanium

EN 1.4401 stainless steel belongs to the iron alloys classification, while grade 38 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 1.4401 stainless steel and the bottom bar is grade 38 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 14 to 40
11
Fatigue Strength, MPa 200 to 320
530
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
40
Shear Strength, MPa 410 to 550
600
Tensile Strength: Ultimate (UTS), MPa 600 to 900
1000
Tensile Strength: Yield (Proof), MPa 230 to 570
910

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 950
330
Melting Completion (Liquidus), °C 1440
1620
Melting Onset (Solidus), °C 1400
1570
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 15
8.0
Thermal Expansion, µm/m-K 16
9.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
36
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 3.8
35
Embodied Energy, MJ/kg 52
560
Embodied Water, L/kg 150
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
3840
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 21 to 32
62
Strength to Weight: Bending, points 20 to 26
49
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 13 to 20
72

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.5
Carbon (C), % 0 to 0.070
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
1.2 to 1.8
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
0.2 to 0.3
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
89.9 to 93.1
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4