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ACI-ASTM CF20 Steel vs. R58150 Titanium

ACI-ASTM CF20 steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium 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 ACI-ASTM CF20 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, % 50
13
Fatigue Strength, MPa 240
330
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
52
Tensile Strength: Ultimate (UTS), MPa 530
770
Tensile Strength: Yield (Proof), MPa 250
550

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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