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ACI-ASTM CF8C Steel vs. Grade 35 Titanium

ACI-ASTM CF8C steel belongs to the iron alloys classification, while grade 35 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8C steel and the bottom bar is grade 35 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40
5.6
Fatigue Strength, MPa 220
330
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 530
1000
Tensile Strength: Yield (Proof), MPa 260
630

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 980
320
Melting Completion (Liquidus), °C 1420
1630
Melting Onset (Solidus), °C 1430
1580
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 16
7.4
Thermal Expansion, µm/m-K 17
9.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 19
37
Density, g/cm3 7.8
4.6
Embodied Carbon, kg CO2/kg material 3.7
33
Embodied Energy, MJ/kg 53
530
Embodied Water, L/kg 150
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
49
Resilience: Unit (Modulus of Resilience), kJ/m3 170
1830
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 19
61
Strength to Weight: Bending, points 19
49
Thermal Diffusivity, mm2/s 4.3
3.0
Thermal Shock Resistance, points 11
70

Alloy Composition

Aluminum (Al), % 0
4.0 to 5.0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 18 to 21
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 61.8 to 73
0.2 to 0.8
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
1.5 to 2.5
Nickel (Ni), % 9.0 to 12
0
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0.2 to 0.4
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
88.4 to 93
Vanadium (V), % 0
1.1 to 2.1
Residuals, % 0
0 to 0.4