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SAE-AISI O7 Steel vs. R58150 Titanium

SAE-AISI O7 steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
52
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
770

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Melting Completion (Liquidus), °C 1480
1760
Melting Onset (Solidus), °C 1430
1700
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 12
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
48
Density, g/cm3 7.9
5.4
Embodied Carbon, kg CO2/kg material 2.3
31
Embodied Energy, MJ/kg 33
480
Embodied Water, L/kg 52
150

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 24 to 74
40
Strength to Weight: Bending, points 22 to 46
35
Thermal Shock Resistance, points 23 to 70
48

Alloy Composition

Carbon (C), % 1.1 to 1.3
0 to 0.1
Chromium (Cr), % 0.35 to 0.85
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 92.9 to 97.6
0 to 0.1
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.3
14 to 16
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
83.5 to 86
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0