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Grade 6 Titanium vs. ASTM Grade HN Steel

Grade 6 titanium belongs to the titanium alloys classification, while ASTM grade HN steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is ASTM grade HN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 11
9.0
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
77
Tensile Strength: Ultimate (UTS), MPa 890
500

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Maximum Temperature: Mechanical, °C 310
1080
Melting Completion (Liquidus), °C 1580
1400
Melting Onset (Solidus), °C 1530
1350
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
13
Thermal Expansion, µm/m-K 9.4
16

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
17
Strength to Weight: Bending, points 46
18
Thermal Diffusivity, mm2/s 3.2
3.5
Thermal Shock Resistance, points 65
11

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0.2 to 0.5
Chromium (Cr), % 0
19 to 23
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
44.9 to 57.8
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
23 to 27
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0