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SAE-AISI 1108 Steel vs. Grade 4 Titanium

SAE-AISI 1108 steel belongs to the iron alloys classification, while grade 4 titanium belongs to the titanium alloys. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1108 steel and the bottom bar is grade 4 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110 to 140
200
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 23 to 34
17
Fatigue Strength, MPa 170 to 260
340
Poisson's Ratio 0.29
0.32
Reduction in Area, % 45 to 57
28
Shear Modulus, GPa 73
41
Shear Strength, MPa 250 to 280
390
Tensile Strength: Ultimate (UTS), MPa 380 to 440
640
Tensile Strength: Yield (Proof), MPa 220 to 360
530

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1460
1660
Melting Onset (Solidus), °C 1420
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 52
19
Thermal Expansion, µm/m-K 12
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
6.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 1.4
31
Embodied Energy, MJ/kg 18
500
Embodied Water, L/kg 46
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95 to 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 340
1330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 13 to 16
40
Strength to Weight: Bending, points 15 to 16
37
Thermal Diffusivity, mm2/s 14
7.6
Thermal Shock Resistance, points 12 to 14
46

Alloy Composition

Carbon (C), % 0.080 to 0.13
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 98.9 to 99.24
0 to 0.5
Manganese (Mn), % 0.6 to 0.8
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0
Sulfur (S), % 0.080 to 0.13
0
Titanium (Ti), % 0
98.6 to 100
Residuals, % 0
0 to 0.4