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ASTM A369 Grade FP9 vs. Grade 38 Titanium

ASTM A369 grade FP9 belongs to the iron alloys classification, while grade 38 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP9 and the bottom bar is grade 38 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
11
Fatigue Strength, MPa 160
530
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
40
Shear Strength, MPa 300
600
Tensile Strength: Ultimate (UTS), MPa 470
1000
Tensile Strength: Yield (Proof), MPa 240
910

Thermal Properties

Latent Heat of Fusion, J/g 270
410
Maximum Temperature: Mechanical, °C 600
330
Melting Completion (Liquidus), °C 1450
1620
Melting Onset (Solidus), °C 1410
1570
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 26
8.0
Thermal Expansion, µm/m-K 13
9.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
36
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.0
35
Embodied Energy, MJ/kg 28
560
Embodied Water, L/kg 87
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
3840
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
62
Strength to Weight: Bending, points 17
49
Thermal Diffusivity, mm2/s 6.9
3.2
Thermal Shock Resistance, points 13
72

Alloy Composition


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Aluminum (Al), % 0
3.5 to 4.5
Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 8.0 to 10
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 87.1 to 90.3
1.2 to 1.8
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.5 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
89.9 to 93.1
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4