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ACI-ASTM CN7MS Steel vs. R56401 Titanium

ACI-ASTM CN7MS steel belongs to the iron alloys classification, while R56401 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is R56401 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 39
9.1
Fatigue Strength, MPa 200
480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 540
940
Tensile Strength: Yield (Proof), MPa 230
850

Thermal Properties

Latent Heat of Fusion, J/g 340
410
Maximum Temperature: Mechanical, °C 1040
340
Melting Completion (Liquidus), °C 1400
1610
Melting Onset (Solidus), °C 1350
1560
Specific Heat Capacity, J/kg-K 480
560
Thermal Conductivity, W/m-K 12
7.1
Thermal Expansion, µm/m-K 16
9.6

Otherwise Unclassified Properties

Base Metal Price, % relative 28
36
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 5.1
38
Embodied Energy, MJ/kg 71
610
Embodied Water, L/kg 180
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
83
Resilience: Unit (Modulus of Resilience), kJ/m3 140
3440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 19
59
Strength to Weight: Bending, points 19
48
Thermal Diffusivity, mm2/s 3.2
2.9
Thermal Shock Resistance, points 13
67

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 1.5 to 2.0
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 45.4 to 53.5
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 2.5 to 3.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
88.5 to 91
Vanadium (V), % 0
3.5 to 4.5