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AISI 308 Stainless Steel vs. R58150 Titanium

AISI 308 stainless steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI 308 stainless steel and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Elongation at Break, % 45
13
Fatigue Strength, MPa 210
330
Poisson's Ratio 0.28
0.32
Reduction in Area, % 57
68
Shear Modulus, GPa 78
52
Shear Strength, MPa 410
470
Tensile Strength: Ultimate (UTS), MPa 590
770
Tensile Strength: Yield (Proof), MPa 230
550

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 990
320
Melting Completion (Liquidus), °C 1420
1760
Melting Onset (Solidus), °C 1380
1700
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 16
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
48
Density, g/cm3 7.8
5.4
Embodied Carbon, kg CO2/kg material 3.2
31
Embodied Energy, MJ/kg 46
480
Embodied Water, L/kg 150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
94
Resilience: Unit (Modulus of Resilience), kJ/m3 140
1110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
32
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 20
35
Thermal Shock Resistance, points 13
48

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 19 to 21
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 64.1 to 71
0 to 0.1
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 10 to 12
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
83.5 to 86