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Grade 38 Titanium vs. ASTM Grade HC Steel

Grade 38 titanium belongs to the titanium alloys classification, while ASTM grade HC steel belongs to the iron alloys. There are 29 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 grade 38 titanium and the bottom bar is ASTM grade HC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 11
6.0
Fatigue Strength, MPa 530
96
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 40
80
Tensile Strength: Ultimate (UTS), MPa 1000
430
Tensile Strength: Yield (Proof), MPa 910
200

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Maximum Temperature: Mechanical, °C 330
1100
Melting Completion (Liquidus), °C 1620
1410
Melting Onset (Solidus), °C 1570
1370
Specific Heat Capacity, J/kg-K 550
490
Thermal Conductivity, W/m-K 8.0
17
Thermal Expansion, µm/m-K 9.3
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 36
14
Density, g/cm3 4.5
7.6
Embodied Carbon, kg CO2/kg material 35
2.8
Embodied Energy, MJ/kg 560
40
Embodied Water, L/kg 160
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
21
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
95
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
26
Strength to Weight: Axial, points 62
16
Strength to Weight: Bending, points 49
16
Thermal Diffusivity, mm2/s 3.2
4.5
Thermal Shock Resistance, points 72
14

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
0
Carbon (C), % 0 to 0.080
0 to 0.5
Chromium (Cr), % 0
26 to 30
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
61.9 to 74
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 4.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 89.9 to 93.1
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0