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ACI-ASTM CH20 Steel vs. Grade 9 Titanium

ACI-ASTM CH20 steel belongs to the iron alloys classification, while grade 9 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 CH20 steel and the bottom bar is grade 9 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 38
11 to 17
Fatigue Strength, MPa 290
330 to 480
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 610
700 to 960
Tensile Strength: Yield (Proof), MPa 350
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 310
410
Maximum Temperature: Mechanical, °C 1100
330
Melting Completion (Liquidus), °C 1410
1640
Melting Onset (Solidus), °C 1430
1590
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 14
8.1
Thermal Expansion, µm/m-K 15
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 20
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.7
36
Embodied Energy, MJ/kg 53
580
Embodied Water, L/kg 180
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 300
1380 to 3220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 22
43 to 60
Strength to Weight: Bending, points 21
39 to 48
Thermal Diffusivity, mm2/s 3.7
3.3
Thermal Shock Resistance, points 15
52 to 71

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 22 to 26
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 54.7 to 66
0 to 0.25
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
92.6 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4