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ACI-ASTM CF8C Steel vs. Grade 12 Titanium

ACI-ASTM CF8C steel belongs to the iron alloys classification, while grade 12 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 12 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
170
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40
21
Fatigue Strength, MPa 220
280
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
39
Tensile Strength: Ultimate (UTS), MPa 530
530
Tensile Strength: Yield (Proof), MPa 260
410

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 980
320
Melting Completion (Liquidus), °C 1420
1660
Melting Onset (Solidus), °C 1430
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 17
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
6.6

Otherwise Unclassified Properties

Base Metal Price, % relative 19
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.7
31
Embodied Energy, MJ/kg 53
500
Embodied Water, L/kg 150
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 170
770
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 19
32
Strength to Weight: Bending, points 19
32
Thermal Diffusivity, mm2/s 4.3
8.5
Thermal Shock Resistance, points 11
37

Alloy Composition

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 to 0.3
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0.2 to 0.4
Nickel (Ni), % 9.0 to 12
0.6 to 0.9
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
97.6 to 99.2
Residuals, % 0
0 to 0.4