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EN 1.4438 Stainless Steel vs. R56401 Titanium

EN 1.4438 stainless steel belongs to the iron alloys classification, while R56401 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 1.4438 stainless steel and the bottom bar is R56401 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 41
9.1
Fatigue Strength, MPa 220
480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 79
40
Shear Strength, MPa 420
560
Tensile Strength: Ultimate (UTS), MPa 620
940
Tensile Strength: Yield (Proof), MPa 250
850

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1000
340
Melting Completion (Liquidus), °C 1450
1610
Melting Onset (Solidus), °C 1400
1560
Specific Heat Capacity, J/kg-K 470
560
Thermal Conductivity, W/m-K 14
7.1
Thermal Expansion, µm/m-K 16
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 22
36
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 4.4
38
Embodied Energy, MJ/kg 60
610
Embodied Water, L/kg 160
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
83
Resilience: Unit (Modulus of Resilience), kJ/m3 150
3440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 22
59
Strength to Weight: Bending, points 20
48
Thermal Diffusivity, mm2/s 3.7
2.9
Thermal Shock Resistance, points 14
67

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17.5 to 19.5
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 57.3 to 66.5
0 to 0.25
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 13 to 16
0
Nitrogen (N), % 0 to 0.1
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
88.5 to 91
Vanadium (V), % 0
3.5 to 4.5