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AWS ERTi-12 vs. SAE-AISI S7 Steel

AWS ERTi-12 belongs to the titanium alloys classification, while SAE-AISI S7 steel belongs to the iron 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 ERTi-12 and the bottom bar is SAE-AISI S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
74
Tensile Strength: Ultimate (UTS), MPa 480
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 420
260
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
40
Thermal Expansion, µm/m-K 8.7
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 37
5.0
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
2.3
Embodied Energy, MJ/kg 510
31
Embodied Water, L/kg 110
65

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 30
24 to 72
Strength to Weight: Bending, points 30
22 to 46
Thermal Diffusivity, mm2/s 8.7
11
Thermal Shock Resistance, points 37
22 to 66

Alloy Composition

Carbon (C), % 0 to 0.030
0.45 to 0.55
Chromium (Cr), % 0
3.0 to 3.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.15
91.6 to 94.9
Manganese (Mn), % 0
0.2 to 0.9
Molybdenum (Mo), % 0.2 to 0.4
1.3 to 1.8
Nickel (Ni), % 0.060 to 0.090
0
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99.147 to 99.66
0
Vanadium (V), % 0
0 to 0.3