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ASTM Grade HN Steel vs. Grade C-2 Titanium

ASTM grade HN steel belongs to the iron alloys classification, while grade C-2 titanium belongs to the titanium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is grade C-2 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
180
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 9.0
17
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 500
390

Thermal Properties

Latent Heat of Fusion, J/g 310
420
Maximum Temperature: Mechanical, °C 1080
320
Melting Completion (Liquidus), °C 1400
1660
Melting Onset (Solidus), °C 1350
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 13
21
Thermal Expansion, µm/m-K 16
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 26
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 4.6
31
Embodied Energy, MJ/kg 66
510
Embodied Water, L/kg 180
110

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 18
26
Thermal Diffusivity, mm2/s 3.5
8.8
Thermal Shock Resistance, points 11
30

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.1
Chromium (Cr), % 19 to 23
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 44.9 to 57.8
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
98.8 to 100
Residuals, % 0
0 to 0.4