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Grade 35 Titanium vs. AISI 431 Stainless Steel

Grade 35 titanium belongs to the titanium alloys classification, while AISI 431 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 35 titanium and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 5.6
15 to 17
Fatigue Strength, MPa 330
430 to 610
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 580
550 to 840
Tensile Strength: Ultimate (UTS), MPa 1000
890 to 1380
Tensile Strength: Yield (Proof), MPa 630
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Maximum Temperature: Mechanical, °C 320
850
Melting Completion (Liquidus), °C 1630
1510
Melting Onset (Solidus), °C 1580
1450
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.4
26
Thermal Expansion, µm/m-K 9.3
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.1
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.0
Density, g/cm3 4.6
7.7
Embodied Carbon, kg CO2/kg material 33
2.2
Embodied Energy, MJ/kg 530
31
Embodied Water, L/kg 170
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
1270 to 2770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 61
32 to 50
Strength to Weight: Bending, points 49
27 to 36
Thermal Diffusivity, mm2/s 3.0
7.0
Thermal Shock Resistance, points 70
28 to 43

Alloy Composition

Aluminum (Al), % 4.0 to 5.0
0
Carbon (C), % 0 to 0.080
0 to 0.2
Chromium (Cr), % 0
15 to 17
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.2 to 0.8
78.2 to 83.8
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.5
0
Nickel (Ni), % 0
1.3 to 2.5
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 88.4 to 93
0
Vanadium (V), % 1.1 to 2.1
0
Residuals, % 0 to 0.4
0