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SAE-AISI 4626 Steel vs. Grade 3 Titanium

SAE-AISI 4626 steel belongs to the iron alloys classification, while grade 3 titanium belongs to the titanium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4626 steel and the bottom bar is grade 3 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
170
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 25
21
Fatigue Strength, MPa 240
300
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
39
Shear Strength, MPa 320
320
Tensile Strength: Ultimate (UTS), MPa 500
510
Tensile Strength: Yield (Proof), MPa 330
440

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 44
21
Thermal Expansion, µm/m-K 13
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
6.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.5
31
Embodied Energy, MJ/kg 20
510
Embodied Water, L/kg 48
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 290
910
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 18
32
Strength to Weight: Bending, points 18
32
Thermal Diffusivity, mm2/s 12
8.6
Thermal Shock Resistance, points 15
37

Alloy Composition

Carbon (C), % 0.24 to 0.29
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 97.4 to 98.3
0 to 0.3
Manganese (Mn), % 0.45 to 0.65
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.7 to 1.0
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.35
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
98.8 to 100
Residuals, % 0
0 to 0.4