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ASTM A356 Grade 8 vs. Grade 2 Titanium

ASTM A356 grade 8 belongs to the iron alloys classification, while grade 2 titanium belongs to the titanium alloys. There are 31 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 A356 grade 8 and the bottom bar is grade 2 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21
23
Fatigue Strength, MPa 270
250
Poisson's Ratio 0.29
0.32
Reduction in Area, % 50
37
Shear Modulus, GPa 73
38
Tensile Strength: Ultimate (UTS), MPa 630
420
Tensile Strength: Yield (Proof), MPa 390
360

Thermal Properties

Latent Heat of Fusion, J/g 260
420
Maximum Temperature: Mechanical, °C 440
320
Melting Completion (Liquidus), °C 1470
1660
Melting Onset (Solidus), °C 1430
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 38
22
Thermal Expansion, µm/m-K 13
9.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
7.2

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.0
31
Embodied Energy, MJ/kg 26
510
Embodied Water, L/kg 55
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
92
Resilience: Unit (Modulus of Resilience), kJ/m3 390
600
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 22
26
Strength to Weight: Bending, points 21
28
Thermal Diffusivity, mm2/s 10
8.9
Thermal Shock Resistance, points 18
32

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 1.0 to 1.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 95.4 to 97.4
0 to 0.3
Manganese (Mn), % 0.5 to 0.9
0
Molybdenum (Mo), % 0.9 to 1.2
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.2 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.9 to 100
Vanadium (V), % 0.050 to 0.15
0
Residuals, % 0
0 to 0.4