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ASTM Grade HN Steel vs. Grade C-6 Titanium

ASTM grade HN steel belongs to the iron alloys classification, while grade C-6 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-6 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
290
Elastic (Young's, Tensile) Modulus, GPa 200
100
Elongation at Break, % 9.0
9.0
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
39
Tensile Strength: Ultimate (UTS), MPa 500
890

Thermal Properties

Latent Heat of Fusion, J/g 310
410
Maximum Temperature: Mechanical, °C 1080
310
Melting Completion (Liquidus), °C 1400
1580
Melting Onset (Solidus), °C 1350
1530
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 13
7.8
Thermal Expansion, µm/m-K 16
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 26
36
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 4.6
30
Embodied Energy, MJ/kg 66
480
Embodied Water, L/kg 180
190

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
55
Strength to Weight: Bending, points 18
46
Thermal Diffusivity, mm2/s 3.5
3.2
Thermal Shock Resistance, points 11
63

Alloy Composition

Aluminum (Al), % 0
4.0 to 6.0
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 0.5
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 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
2.0 to 3.0
Titanium (Ti), % 0
89.7 to 94
Residuals, % 0
0 to 0.4