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R56401 Titanium vs. AISI 321 Stainless Steel

R56401 titanium belongs to the titanium alloys classification, while AISI 321 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R56401 titanium and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 9.1
34 to 50
Fatigue Strength, MPa 480
220 to 270
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
77
Shear Strength, MPa 560
420 to 460
Tensile Strength: Ultimate (UTS), MPa 940
590 to 690
Tensile Strength: Yield (Proof), MPa 850
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 340
870
Melting Completion (Liquidus), °C 1610
1430
Melting Onset (Solidus), °C 1560
1400
Specific Heat Capacity, J/kg-K 560
480
Thermal Conductivity, W/m-K 7.1
16
Thermal Expansion, µm/m-K 9.6
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 36
16
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 38
3.2
Embodied Energy, MJ/kg 610
45
Embodied Water, L/kg 200
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 3440
130 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 59
21 to 25
Strength to Weight: Bending, points 48
20 to 22
Thermal Diffusivity, mm2/s 2.9
4.1
Thermal Shock Resistance, points 67
13 to 15

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 0
17 to 19
Hydrogen (H), % 0 to 0.012
0
Iron (Fe), % 0 to 0.25
65.3 to 74
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
9.0 to 12
Nitrogen (N), % 0 to 0.050
0 to 0.1
Oxygen (O), % 0 to 0.13
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 88.5 to 91
0 to 0.7
Vanadium (V), % 3.5 to 4.5
0