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SAE-AISI P21 Steel vs. AWS ERTi-2

SAE-AISI P21 steel belongs to the iron alloys classification, while AWS ERTi-2 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 SAE-AISI P21 steel and the bottom bar is AWS ERTi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 1130
340

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Melting Completion (Liquidus), °C 1450
1670
Melting Onset (Solidus), °C 1410
1620
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 41
21
Thermal Expansion, µm/m-K 12
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 2.3
31
Embodied Energy, MJ/kg 32
510
Embodied Water, L/kg 62
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 40
21
Strength to Weight: Bending, points 31
24
Thermal Diffusivity, mm2/s 11
8.7
Thermal Shock Resistance, points 37
27

Alloy Composition

Carbon (C), % 0.18 to 0.22
0 to 0.030
Chromium (Cr), % 0 to 0.5
0
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 92.1 to 94.2
0 to 0.12
Manganese (Mn), % 0.35 to 0.72
0
Nickel (Ni), % 3.9 to 4.3
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.667 to 99.92
Vanadium (V), % 0.15 to 0.25
0