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ASTM A182 Grade F23 vs. Grade 18 Titanium

ASTM A182 grade F23 belongs to the iron alloys classification, while grade 18 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 A182 grade F23 and the bottom bar is grade 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 22
11 to 17
Fatigue Strength, MPa 320
330 to 480
Poisson's Ratio 0.29
0.32
Reduction in Area, % 46
23
Shear Modulus, GPa 74
40
Shear Strength, MPa 360
420 to 590
Tensile Strength: Ultimate (UTS), MPa 570
690 to 980
Tensile Strength: Yield (Proof), MPa 460
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 450
330
Melting Completion (Liquidus), °C 1500
1640
Melting Onset (Solidus), °C 1450
1590
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 41
8.3
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.7

Otherwise Unclassified Properties

Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 2.5
41
Embodied Energy, MJ/kg 36
670
Embodied Water, L/kg 59
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 550
1380 to 3110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 20
43 to 61
Strength to Weight: Bending, points 19
39 to 49
Thermal Diffusivity, mm2/s 11
3.4
Thermal Shock Resistance, points 17
47 to 67

Alloy Composition


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Aluminum (Al), % 0 to 0.030
2.5 to 3.5
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 1.9 to 2.6
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 93.2 to 96.2
0 to 0.25
Manganese (Mn), % 0.1 to 0.6
0
Molybdenum (Mo), % 0.050 to 0.3
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.020 to 0.080
0
Nitrogen (N), % 0 to 0.015
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.0050 to 0.060
92.5 to 95.5
Tungsten (W), % 1.5 to 1.8
0
Vanadium (V), % 0.2 to 0.3
2.0 to 3.0
Residuals, % 0
0 to 0.4