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ASTM A356 Grade 9 vs. AWS ERTi-2

ASTM A356 grade 9 belongs to the iron alloys classification, while AWS ERTi-2 belongs to the titanium alloys. There are 29 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 9 and the bottom bar is AWS ERTi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 17
20
Fatigue Strength, MPa 310
190
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 670
340
Tensile Strength: Yield (Proof), MPa 460
280

Thermal Properties

Latent Heat of Fusion, J/g 260
420
Maximum Temperature: Mechanical, °C 440
320
Melting Completion (Liquidus), °C 1470
1670
Melting Onset (Solidus), °C 1430
1620
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 41
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.6
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.4
31
Embodied Energy, MJ/kg 33
510
Embodied Water, L/kg 56
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
64
Resilience: Unit (Modulus of Resilience), kJ/m3 570
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 11
8.7
Thermal Shock Resistance, points 19
27

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 1.0 to 1.5
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 95.2 to 97.2
0 to 0.12
Manganese (Mn), % 0.5 to 0.9
0
Molybdenum (Mo), % 0.9 to 1.2
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
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
99.667 to 99.92
Vanadium (V), % 0.2 to 0.35
0