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AISI 418 Stainless Steel vs. AWS ERTi-1

AISI 418 stainless steel belongs to the iron alloys classification, while AWS ERTi-1 belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is AWS ERTi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17
24
Fatigue Strength, MPa 520
120
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 1100
240
Tensile Strength: Yield (Proof), MPa 850
170

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 770
320
Melting Completion (Liquidus), °C 1500
1670
Melting Onset (Solidus), °C 1460
1620
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 25
21
Thermal Expansion, µm/m-K 10
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 15
37
Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 2.9
31
Embodied Energy, MJ/kg 41
510
Embodied Water, L/kg 110
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
52
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 29
19
Thermal Diffusivity, mm2/s 6.7
8.7
Thermal Shock Resistance, points 40
19

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.030
Chromium (Cr), % 12 to 14
0
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 78.5 to 83.6
0 to 0.080
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
0
Nitrogen (N), % 0
0 to 0.012
Oxygen (O), % 0
0.030 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.773 to 99.97
Tungsten (W), % 2.5 to 3.5
0