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AWS ERTi-7 vs. SAE-AISI 1144 Steel

AWS ERTi-7 belongs to the titanium alloys classification, while SAE-AISI 1144 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 20
11 to 17
Fatigue Strength, MPa 190
280 to 430
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
72
Tensile Strength: Ultimate (UTS), MPa 340
750 to 840
Tensile Strength: Yield (Proof), MPa 280
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
400
Melting Completion (Liquidus), °C 1670
1450
Melting Onset (Solidus), °C 1620
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
51
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
8.2

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 47
1.4
Embodied Energy, MJ/kg 800
19
Embodied Water, L/kg 470
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 360
480 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 21
27 to 30
Strength to Weight: Bending, points 24
23 to 25
Thermal Diffusivity, mm2/s 8.8
14
Thermal Shock Resistance, points 26
22 to 24

Alloy Composition

Carbon (C), % 0 to 0.030
0.4 to 0.48
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
97.5 to 98
Manganese (Mn), % 0
1.4 to 1.7
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0.24 to 0.33
Titanium (Ti), % 99.417 to 99.8
0