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AWS E309 vs. AWS ERTi-7

AWS E309 belongs to the iron alloys classification, while AWS ERTi-7 belongs to the titanium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS E309 and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 34
20
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 620
340

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Melting Completion (Liquidus), °C 1410
1670
Melting Onset (Solidus), °C 1370
1620
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 15
21
Thermal Expansion, µm/m-K 14
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.7
47
Embodied Energy, MJ/kg 52
800
Embodied Water, L/kg 180
470

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.0
8.8
Thermal Shock Resistance, points 16
26

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 22 to 25
0
Copper (Cu), % 0 to 0.75
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 55.8 to 65.5
0 to 0.12
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 12 to 14
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.417 to 99.8