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ASTM B817 Type I vs. SAE-AISI M3 Class 2 Steel

ASTM B817 type I belongs to the titanium alloys classification, while SAE-AISI M3 class 2 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 M3 class 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 770 to 960
770 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Melting Completion (Liquidus), °C 1600
1620
Melting Onset (Solidus), °C 1550
1570
Specific Heat Capacity, J/kg-K 560
440
Thermal Conductivity, W/m-K 7.1
26
Thermal Expansion, µm/m-K 9.6
12

Otherwise Unclassified Properties

Base Metal Price, % relative 36
25
Density, g/cm3 4.4
8.3
Embodied Carbon, kg CO2/kg material 38
12
Embodied Energy, MJ/kg 610
180
Embodied Water, L/kg 200
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 48 to 60
26 to 74
Strength to Weight: Bending, points 42 to 49
22 to 45
Thermal Diffusivity, mm2/s 2.9
7.2
Thermal Shock Resistance, points 54 to 68
24 to 69

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
1.2 to 1.3
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
75.8 to 82.3
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.8 to 6.5
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
0.2 to 0.45
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 87 to 91
0
Tungsten (W), % 0
5.0 to 6.8
Vanadium (V), % 3.5 to 4.5
2.8 to 3.8
Residuals, % 0 to 0.4
0