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AISI 444 Stainless Steel vs. R56406 Titanium

AISI 444 stainless steel belongs to the iron alloys classification, while R56406 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 444 stainless steel and the bottom bar is R56406 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 23
9.1
Fatigue Strength, MPa 210
480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 470
980
Tensile Strength: Yield (Proof), MPa 310
850

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 930
340
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1420
1560
Specific Heat Capacity, J/kg-K 480
560
Thermal Conductivity, W/m-K 23
7.1
Thermal Expansion, µm/m-K 10
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
36
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 3.4
38
Embodied Energy, MJ/kg 47
610
Embodied Water, L/kg 130
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
85
Resilience: Unit (Modulus of Resilience), kJ/m3 240
3420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
61
Strength to Weight: Bending, points 17
49
Thermal Diffusivity, mm2/s 6.2
2.8
Thermal Shock Resistance, points 16
69

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.025
0 to 0.1
Chromium (Cr), % 17.5 to 19.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 73.3 to 80.8
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.2 to 0.8
0
Nitrogen (N), % 0 to 0.035
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.2 to 0.8
88.1 to 91
Vanadium (V), % 0
3.5 to 4.5