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SAE-AISI 8620 Steel vs. Grade 36 Titanium

SAE-AISI 8620 steel belongs to the iron alloys classification, while grade 36 titanium belongs to the titanium alloys. There are 25 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 8620 steel and the bottom bar is grade 36 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 13 to 31
11
Fatigue Strength, MPa 270 to 360
300
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 73
39
Shear Strength, MPa 340 to 420
320
Tensile Strength: Ultimate (UTS), MPa 520 to 690
530
Tensile Strength: Yield (Proof), MPa 360 to 570
520

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Maximum Temperature: Mechanical, °C 410
320
Melting Completion (Liquidus), °C 1460
2020
Melting Onset (Solidus), °C 1420
1950
Specific Heat Capacity, J/kg-K 470
420
Thermal Expansion, µm/m-K 13
8.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.3
Embodied Carbon, kg CO2/kg material 1.5
58
Embodied Energy, MJ/kg 20
920
Embodied Water, L/kg 50
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 150
59
Resilience: Unit (Modulus of Resilience), kJ/m3 340 to 880
1260
Stiffness to Weight: Axial, points 13
9.3
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 24
23
Strength to Weight: Bending, points 18 to 22
23
Thermal Shock Resistance, points 15 to 20
45

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.030
Chromium (Cr), % 0.4 to 0.6
0
Hydrogen (H), % 0
0 to 0.0035
Iron (Fe), % 96.9 to 98
0 to 0.030
Manganese (Mn), % 0.7 to 0.9
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Niobium (Nb), % 0
42 to 47
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.16
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
52.3 to 58
Residuals, % 0
0 to 0.4