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ACI-ASTM CF20 Steel vs. Grade C-2 Titanium

ACI-ASTM CF20 steel belongs to the iron alloys classification, while grade C-2 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is grade C-2 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
180
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 50
17
Fatigue Strength, MPa 240
200
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 530
390
Tensile Strength: Yield (Proof), MPa 250
310

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 970
320
Melting Completion (Liquidus), °C 1420
1660
Melting Onset (Solidus), °C 1410
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 17
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 16
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.1
31
Embodied Energy, MJ/kg 44
510
Embodied Water, L/kg 150
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
61
Resilience: Unit (Modulus of Resilience), kJ/m3 160
460
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
26
Thermal Diffusivity, mm2/s 4.3
8.8
Thermal Shock Resistance, points 11
30

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 0.2
Manganese (Mn), % 0 to 1.5
0
Nickel (Ni), % 8.0 to 11
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
98.8 to 100
Residuals, % 0
0 to 0.4