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EN 1.4618 Stainless Steel vs. Grade 7 Titanium

EN 1.4618 stainless steel belongs to the iron alloys classification, while grade 7 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 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
150
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 51
24
Fatigue Strength, MPa 240 to 250
250
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
38
Shear Strength, MPa 480 to 500
270
Tensile Strength: Ultimate (UTS), MPa 680 to 700
420
Tensile Strength: Yield (Proof), MPa 250 to 260
340

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 900
320
Melting Completion (Liquidus), °C 1400
1660
Melting Onset (Solidus), °C 1360
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 16
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.7
47
Embodied Energy, MJ/kg 39
800
Embodied Water, L/kg 150
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
95
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24 to 25
26
Strength to Weight: Bending, points 22 to 23
28
Thermal Diffusivity, mm2/s 4.0
8.9
Thermal Shock Resistance, points 15 to 16
31

Alloy Composition

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 0.3
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 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.070
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
98.7 to 99.88
Residuals, % 0
0 to 0.4