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ACI-ASTM CA6NM Steel vs. Grade 7 Titanium

ACI-ASTM CA6NM steel belongs to the iron alloys classification, while grade 7 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 CA6NM steel and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
150
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17
24
Fatigue Strength, MPa 380
250
Poisson's Ratio 0.28
0.32
Reduction in Area, % 40
34
Shear Modulus, GPa 76
38
Tensile Strength: Ultimate (UTS), MPa 850
420
Tensile Strength: Yield (Proof), MPa 620
340

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 770
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 25
22
Thermal Expansion, µm/m-K 10
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.5
47
Embodied Energy, MJ/kg 34
800
Embodied Water, L/kg 110
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
95
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 30
26
Strength to Weight: Bending, points 26
28
Thermal Diffusivity, mm2/s 6.7
8.9
Thermal Shock Resistance, points 31
31

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 11.5 to 14
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.4 to 84.6
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 3.5 to 4.5
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4