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SAE-AISI 1070 Steel vs. Grade 31 Titanium

SAE-AISI 1070 steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 30 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 1070 steel and the bottom bar is grade 31 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 10 to 13
20
Fatigue Strength, MPa 270 to 350
300
Poisson's Ratio 0.29
0.32
Reduction in Area, % 34 to 51
34
Shear Modulus, GPa 72
41
Shear Strength, MPa 380 to 460
320
Tensile Strength: Ultimate (UTS), MPa 640 to 760
510
Tensile Strength: Yield (Proof), MPa 420 to 560
450

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 50
21
Thermal Expansion, µm/m-K 12
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 12
6.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.4
36
Embodied Energy, MJ/kg 19
600
Embodied Water, L/kg 46
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59 to 86
99
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 850
940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 23 to 27
32
Strength to Weight: Bending, points 21 to 24
32
Thermal Diffusivity, mm2/s 14
8.5
Thermal Shock Resistance, points 21 to 25
39

Alloy Composition

Carbon (C), % 0.65 to 0.75
0 to 0.080
Cobalt (Co), % 0
0.2 to 0.8
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 98.3 to 98.8
0 to 0.3
Manganese (Mn), % 0.6 to 0.9
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.35
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.040
0
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
97.9 to 99.76
Residuals, % 0
0 to 0.4