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AWS ERTi-12 vs. SAE-AISI 8740 Steel

AWS ERTi-12 belongs to the titanium alloys classification, while SAE-AISI 8740 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-12 and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 12
11 to 23
Fatigue Strength, MPa 200
270 to 350
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Tensile Strength: Ultimate (UTS), MPa 480
580 to 670
Tensile Strength: Yield (Proof), MPa 340
380 to 570

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
410
Melting Completion (Liquidus), °C 1670
1460
Melting Onset (Solidus), °C 1620
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
39
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.6
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
1.5
Embodied Energy, MJ/kg 510
20
Embodied Water, L/kg 110
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 550
390 to 850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 30
20 to 24
Strength to Weight: Bending, points 30
20 to 22
Thermal Diffusivity, mm2/s 8.7
10
Thermal Shock Resistance, points 37
17 to 20

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 0
0.4 to 0.6
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.15
96.5 to 97.7
Manganese (Mn), % 0
0.75 to 1.0
Molybdenum (Mo), % 0.2 to 0.4
0.2 to 0.3
Nickel (Ni), % 0.060 to 0.090
0.4 to 0.7
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 99.147 to 99.66
0