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EN 1.4421 Stainless Steel vs. Grade 2 Titanium

EN 1.4421 stainless steel belongs to the iron alloys classification, while grade 2 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 1.4421 stainless steel and the bottom bar is grade 2 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 11 to 17
23
Fatigue Strength, MPa 380 to 520
250
Impact Strength: V-Notched Charpy, J 30 to 67
160
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
38
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
420
Tensile Strength: Yield (Proof), MPa 620 to 950
360

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 870
320
Melting Completion (Liquidus), °C 1440
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 16
22
Thermal Expansion, µm/m-K 10
9.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
7.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.6
31
Embodied Energy, MJ/kg 36
510
Embodied Water, L/kg 130
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
92
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
600
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 31 to 39
26
Strength to Weight: Bending, points 26 to 30
28
Thermal Diffusivity, mm2/s 4.4
8.9
Thermal Shock Resistance, points 31 to 39
32

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 15.5 to 17.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 74.4 to 80.5
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 4.0 to 5.5
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.8
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
98.9 to 100
Residuals, % 0
0 to 0.4