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Grade 6 Titanium vs. AISI 420 Stainless Steel

Grade 6 titanium belongs to the titanium alloys classification, while AISI 420 stainless steel belongs to the iron 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 grade 6 titanium and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 11
8.0 to 15
Fatigue Strength, MPa 290
220 to 670
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
76
Shear Strength, MPa 530
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 890
690 to 1720
Tensile Strength: Yield (Proof), MPa 840
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 310
620
Melting Completion (Liquidus), °C 1580
1510
Melting Onset (Solidus), °C 1530
1450
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
27
Thermal Expansion, µm/m-K 9.4
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 36
7.5
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 30
2.0
Embodied Energy, MJ/kg 480
28
Embodied Water, L/kg 190
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
380 to 4410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
25 to 62
Strength to Weight: Bending, points 46
22 to 41
Thermal Diffusivity, mm2/s 3.2
7.3
Thermal Shock Resistance, points 65
25 to 62

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0.15 to 0.4
Chromium (Cr), % 0
12 to 14
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
82.3 to 87.9
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 0.75
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0