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R58150 Titanium vs. ACI-ASTM CF20 Steel

R58150 titanium belongs to the titanium alloys classification, while ACI-ASTM CF20 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R58150 titanium and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
200
Elongation at Break, % 13
50
Fatigue Strength, MPa 330
240
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 52
77
Tensile Strength: Ultimate (UTS), MPa 770
530
Tensile Strength: Yield (Proof), MPa 550
250

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 320
970
Melting Completion (Liquidus), °C 1760
1420
Melting Onset (Solidus), °C 1700
1410
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 8.4
17

Otherwise Unclassified Properties

Base Metal Price, % relative 48
16
Density, g/cm3 5.4
7.8
Embodied Carbon, kg CO2/kg material 31
3.1
Embodied Energy, MJ/kg 480
44
Embodied Water, L/kg 150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 32
25
Strength to Weight: Axial, points 40
19
Strength to Weight: Bending, points 35
19
Thermal Shock Resistance, points 48
11

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.2
Chromium (Cr), % 0
18 to 21
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.1
64.2 to 74
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 14 to 16
0
Nickel (Ni), % 0
8.0 to 11
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 83.5 to 86
0