MakeItFrom.com
Menu (ESC)

AISI 418 Stainless Steel vs. Grade 30 Titanium

AISI 418 stainless steel belongs to the iron alloys classification, while grade 30 titanium belongs to the titanium alloys. There are 30 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 AISI 418 stainless steel and the bottom bar is grade 30 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17
23
Fatigue Strength, MPa 520
250
Poisson's Ratio 0.28
0.32
Reduction in Area, % 50
34
Shear Modulus, GPa 77
41
Shear Strength, MPa 680
240
Tensile Strength: Ultimate (UTS), MPa 1100
390
Tensile Strength: Yield (Proof), MPa 850
350

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 770
320
Melting Completion (Liquidus), °C 1500
1660
Melting Onset (Solidus), °C 1460
1610
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
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
6.9

Otherwise Unclassified Properties

Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 2.9
36
Embodied Energy, MJ/kg 41
600
Embodied Water, L/kg 110
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
86
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 29
26
Thermal Diffusivity, mm2/s 6.7
8.6
Thermal Shock Resistance, points 40
30

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.080
Chromium (Cr), % 12 to 14
0
Cobalt (Co), % 0
0.2 to 0.8
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.5 to 83.6
0 to 0.3
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 0.25
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98 to 99.76
Tungsten (W), % 2.5 to 3.5
0
Residuals, % 0
0 to 0.4