MakeItFrom.com
Menu (ESC)

AISI 418 Stainless Steel vs. Grade 1 Titanium

AISI 418 stainless steel belongs to the iron alloys classification, while grade 1 titanium belongs to the titanium alloys. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 1 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
120
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17
28
Fatigue Strength, MPa 520
170
Poisson's Ratio 0.28
0.32
Reduction in Area, % 50
36
Shear Modulus, GPa 77
39
Shear Strength, MPa 680
200
Tensile Strength: Ultimate (UTS), MPa 1100
310
Tensile Strength: Yield (Proof), MPa 850
220

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
20
Thermal Expansion, µm/m-K 10
8.8

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
7.3

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
79
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 29
23
Thermal Diffusivity, mm2/s 6.7
8.2
Thermal Shock Resistance, points 40
24

Alloy Composition

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 0.2
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 0.18
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.095 to 100
Tungsten (W), % 2.5 to 3.5
0
Residuals, % 0
0 to 0.4