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ASTM B817 Type I vs. SAE-AISI 1140 Steel

ASTM B817 type I belongs to the titanium alloys classification, while SAE-AISI 1140 steel belongs to the iron 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 ASTM B817 type I and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 4.0 to 13
14 to 18
Fatigue Strength, MPa 360 to 520
230 to 370
Poisson's Ratio 0.32
0.29
Reduction in Area, % 5.0 to 29
39 to 46
Shear Modulus, GPa 40
72
Tensile Strength: Ultimate (UTS), MPa 770 to 960
600 to 700
Tensile Strength: Yield (Proof), MPa 700 to 860
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 340
400
Melting Completion (Liquidus), °C 1600
1460
Melting Onset (Solidus), °C 1550
1420
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
51
Thermal Expansion, µm/m-K 9.6
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
1.8
Density, g/cm3 4.4
7.8
Embodied Carbon, kg CO2/kg material 38
1.4
Embodied Energy, MJ/kg 610
18
Embodied Water, L/kg 200
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
310 to 870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 48 to 60
21 to 25
Strength to Weight: Bending, points 42 to 49
20 to 22
Thermal Diffusivity, mm2/s 2.9
14
Thermal Shock Resistance, points 54 to 68
18 to 21

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0.37 to 0.44
Chlorine (Cl), % 0 to 0.2
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
98.4 to 98.9
Manganese (Mn), % 0
0.7 to 1.0
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0.080 to 0.13
Titanium (Ti), % 87 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0