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SAE-AISI S7 Steel vs. ASTM B817 Type II

SAE-AISI S7 steel belongs to the iron alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S7 steel and the bottom bar is ASTM B817 type II.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 260
400
Melting Completion (Liquidus), °C 1460
1580
Melting Onset (Solidus), °C 1420
1530
Specific Heat Capacity, J/kg-K 470
550
Thermal Expansion, µm/m-K 12
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
37
Density, g/cm3 7.8
4.6
Embodied Carbon, kg CO2/kg material 2.3
40
Embodied Energy, MJ/kg 31
650
Embodied Water, L/kg 65
220

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
34
Strength to Weight: Axial, points 24 to 72
55 to 58
Strength to Weight: Bending, points 22 to 46
45 to 47
Thermal Shock Resistance, points 22 to 66
62 to 66

Alloy Composition

Aluminum (Al), % 0
5.0 to 6.0
Carbon (C), % 0.45 to 0.55
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 3.0 to 3.5
0
Copper (Cu), % 0 to 0.25
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 91.6 to 94.9
0.35 to 1.0
Manganese (Mn), % 0.2 to 0.9
0
Molybdenum (Mo), % 1.3 to 1.8
0
Nitrogen (N), % 0
0 to 0.040
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 1.0
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
82.1 to 87.8
Vanadium (V), % 0 to 0.3
5.0 to 6.0
Residuals, % 0
0 to 0.4