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ASTM B817 Type I vs. SAE-AISI A2 Steel

ASTM B817 type I belongs to the titanium alloys classification, while SAE-AISI A2 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 A2 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
710 to 2040

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Melting Completion (Liquidus), °C 1600
1450
Melting Onset (Solidus), °C 1550
1410
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
38
Thermal Expansion, µm/m-K 9.6
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 36
5.5
Density, g/cm3 4.4
7.8
Embodied Carbon, kg CO2/kg material 38
2.7
Embodied Energy, MJ/kg 610
38
Embodied Water, L/kg 200
73

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 48 to 60
25 to 73
Strength to Weight: Bending, points 42 to 49
23 to 46
Thermal Diffusivity, mm2/s 2.9
10
Thermal Shock Resistance, points 54 to 68
25 to 71

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
1.0 to 1.1
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
89.4 to 93.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
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 to 0.5
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
0.15 to 0.5
Residuals, % 0 to 0.4
0