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SAE-AISI M3 Class 1 Steel vs. Grade 28 Titanium

SAE-AISI M3 class 1 steel belongs to the iron alloys classification, while grade 28 titanium belongs to the titanium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M3 class 1 steel and the bottom bar is grade 28 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
690 to 980

Thermal Properties

Latent Heat of Fusion, J/g 260
410
Melting Completion (Liquidus), °C 1610
1640
Melting Onset (Solidus), °C 1570
1590
Specific Heat Capacity, J/kg-K 440
550
Thermal Conductivity, W/m-K 26
8.3
Thermal Expansion, µm/m-K 12
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
36
Density, g/cm3 8.3
4.5
Embodied Carbon, kg CO2/kg material 10
37
Embodied Energy, MJ/kg 150
600
Embodied Water, L/kg 100
370

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 26 to 72
43 to 61
Strength to Weight: Bending, points 22 to 44
39 to 49
Thermal Diffusivity, mm2/s 7.2
3.4
Thermal Shock Resistance, points 24 to 67
47 to 66

Alloy Composition


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Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 1.0 to 1.1
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 76.9 to 82.9
0 to 0.25
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.030
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0.2 to 0.45
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
92.4 to 95.4
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.3 to 2.8
2.0 to 3.0
Residuals, % 0
0 to 0.4

Comparable Variants