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SAE-AISI 1078 Steel vs. R58150 Titanium

SAE-AISI 1078 steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1078 steel and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 11 to 14
13
Fatigue Strength, MPa 270 to 350
330
Poisson's Ratio 0.29
0.32
Reduction in Area, % 34 to 45
68
Shear Modulus, GPa 72
52
Shear Strength, MPa 440 to 470
470
Tensile Strength: Ultimate (UTS), MPa 730 to 780
770
Tensile Strength: Yield (Proof), MPa 430 to 570
550

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1460
1760
Melting Onset (Solidus), °C 1420
1700
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 11
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
48
Density, g/cm3 7.8
5.4
Embodied Carbon, kg CO2/kg material 1.4
31
Embodied Energy, MJ/kg 18
480
Embodied Water, L/kg 45
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 90
94
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 860
1110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 26 to 28
40
Strength to Weight: Bending, points 23 to 24
35
Thermal Shock Resistance, points 25 to 26
48

Alloy Composition

Carbon (C), % 0.72 to 0.85
0 to 0.1
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 98.5 to 99
0 to 0.1
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0
14 to 16
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
83.5 to 86