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ASTM B817 Type I vs. SAE-AISI S7 Steel

ASTM B817 type I belongs to the titanium alloys classification, while SAE-AISI S7 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
74
Tensile Strength: Ultimate (UTS), MPa 770 to 960
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 410
260
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
40
Thermal Expansion, µm/m-K 9.6
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 36
5.0
Density, g/cm3 4.4
7.8
Embodied Carbon, kg CO2/kg material 38
2.3
Embodied Energy, MJ/kg 610
31
Embodied Water, L/kg 200
65

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 48 to 60
24 to 72
Strength to Weight: Bending, points 42 to 49
22 to 46
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 54 to 68
22 to 66

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0.45 to 0.55
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
3.0 to 3.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
91.6 to 94.9
Manganese (Mn), % 0
0.2 to 0.9
Molybdenum (Mo), % 0
1.3 to 1.8
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0.2 to 1.0
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 87 to 91
0
Vanadium (V), % 3.5 to 4.5
0 to 0.3
Residuals, % 0 to 0.4
0