MakeItFrom.com
Menu (ESC)

AISI 418 Stainless Steel vs. Grade 9 Titanium

AISI 418 stainless steel belongs to the iron alloys classification, while grade 9 titanium belongs to the titanium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is grade 9 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17
11 to 17
Fatigue Strength, MPa 520
330 to 480
Poisson's Ratio 0.28
0.32
Reduction in Area, % 50
28
Shear Modulus, GPa 77
40
Shear Strength, MPa 680
430 to 580
Tensile Strength: Ultimate (UTS), MPa 1100
700 to 960
Tensile Strength: Yield (Proof), MPa 850
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 270
410
Maximum Temperature: Mechanical, °C 770
330
Melting Completion (Liquidus), °C 1500
1640
Melting Onset (Solidus), °C 1460
1590
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 25
8.1
Thermal Expansion, µm/m-K 10
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
37
Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 2.9
36
Embodied Energy, MJ/kg 41
580
Embodied Water, L/kg 110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
1380 to 3220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 38
43 to 60
Strength to Weight: Bending, points 29
39 to 48
Thermal Diffusivity, mm2/s 6.7
3.3
Thermal Shock Resistance, points 40
52 to 71

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0.15 to 0.2
0 to 0.080
Chromium (Cr), % 12 to 14
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.5 to 83.6
0 to 0.25
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 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
92.6 to 95.5
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4