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Grade 6 Titanium vs. SAE-AISI 4340M Steel

Grade 6 titanium belongs to the titanium alloys classification, while SAE-AISI 4340M steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 11
6.0
Fatigue Strength, MPa 290
690
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 39
72
Shear Strength, MPa 530
1360
Tensile Strength: Ultimate (UTS), MPa 890
2340
Tensile Strength: Yield (Proof), MPa 840
1240

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 310
430
Melting Completion (Liquidus), °C 1580
1440
Melting Onset (Solidus), °C 1530
1400
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
38
Thermal Expansion, µm/m-K 9.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
3.9
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 30
1.9
Embodied Energy, MJ/kg 480
26
Embodied Water, L/kg 190
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
120
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
4120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
84
Strength to Weight: Bending, points 46
51
Thermal Diffusivity, mm2/s 3.2
10
Thermal Shock Resistance, points 65
70

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0.38 to 0.43
Chromium (Cr), % 0
0.7 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
93.3 to 94.8
Manganese (Mn), % 0
0.65 to 0.9
Molybdenum (Mo), % 0
0.35 to 0.45
Nickel (Ni), % 0
1.7 to 2.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.012
Silicon (Si), % 0
1.5 to 1.8
Sulfur (S), % 0
0 to 0.012
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Vanadium (V), % 0
0.050 to 0.1
Residuals, % 0 to 0.4
0