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EN 1.4618 Stainless Steel vs. Grade 9 Titanium

EN 1.4618 stainless steel belongs to the iron alloys classification, while grade 9 titanium belongs to the titanium alloys. There are 30 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 EN 1.4618 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, % 51
11 to 17
Fatigue Strength, MPa 240 to 250
330 to 480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Shear Strength, MPa 480 to 500
430 to 580
Tensile Strength: Ultimate (UTS), MPa 680 to 700
700 to 960
Tensile Strength: Yield (Proof), MPa 250 to 260
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 280
410
Maximum Temperature: Mechanical, °C 900
330
Melting Completion (Liquidus), °C 1400
1640
Melting Onset (Solidus), °C 1360
1590
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 15
8.1
Thermal Expansion, µm/m-K 16
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
37
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.7
36
Embodied Energy, MJ/kg 39
580
Embodied Water, L/kg 150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
1380 to 3220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24 to 25
43 to 60
Strength to Weight: Bending, points 22 to 23
39 to 48
Thermal Diffusivity, mm2/s 4.0
3.3
Thermal Shock Resistance, points 15 to 16
52 to 71

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
0
Copper (Cu), % 1.0 to 2.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 62.7 to 72.5
0 to 0.25
Manganese (Mn), % 5.5 to 9.5
0
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.070
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
92.6 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4