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SAE-AISI 81B45 Steel vs. R58150 Titanium

SAE-AISI 81B45 steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 26 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 SAE-AISI 81B45 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, % 12 to 24
13
Fatigue Strength, MPa 250 to 350
330
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
52
Shear Strength, MPa 340 to 400
470
Tensile Strength: Ultimate (UTS), MPa 540 to 670
770
Tensile Strength: Yield (Proof), MPa 350 to 560
550

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 410
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 12
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
48
Density, g/cm3 7.8
5.4
Embodied Carbon, kg CO2/kg material 1.5
31
Embodied Energy, MJ/kg 20
480
Embodied Water, L/kg 49
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
94
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
1110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 19 to 24
40
Strength to Weight: Bending, points 19 to 22
35
Thermal Shock Resistance, points 17 to 21
48

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0 to 0.1
Chromium (Cr), % 0.35 to 0.55
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 97 to 98
0 to 0.1
Manganese (Mn), % 0.75 to 1.0
0
Molybdenum (Mo), % 0.080 to 0.15
14 to 16
Nickel (Ni), % 0.2 to 0.4
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
83.5 to 86