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Grade 1 Titanium vs. ASTM A387 Grade 5 Steel

Grade 1 titanium belongs to the titanium alloys classification, while ASTM A387 grade 5 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 1 titanium and the bottom bar is ASTM A387 grade 5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 28
20 to 21
Fatigue Strength, MPa 170
160 to 240
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 39
74
Shear Strength, MPa 200
310 to 380
Tensile Strength: Ultimate (UTS), MPa 310
500 to 600
Tensile Strength: Yield (Proof), MPa 220
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 420
260
Maximum Temperature: Mechanical, °C 320
510
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 20
40
Thermal Expansion, µm/m-K 8.8
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 37
4.3
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
1.7
Embodied Energy, MJ/kg 510
23
Embodied Water, L/kg 110
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 320
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 19
18 to 21
Strength to Weight: Bending, points 23
18 to 20
Thermal Diffusivity, mm2/s 8.2
11
Thermal Shock Resistance, points 24
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
4.0 to 6.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
92.1 to 95.3
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.45 to 0.65
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 99.095 to 100
0
Residuals, % 0 to 0.4
0