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EN 1.4658 Stainless Steel vs. Grade 18 Titanium

EN 1.4658 stainless steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is grade 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 28
11 to 17
Fatigue Strength, MPa 530
330 to 480
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 81
40
Shear Strength, MPa 580
420 to 590
Tensile Strength: Ultimate (UTS), MPa 900
690 to 980
Tensile Strength: Yield (Proof), MPa 730
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1100
330
Melting Completion (Liquidus), °C 1450
1640
Melting Onset (Solidus), °C 1400
1590
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 16
8.3
Thermal Expansion, µm/m-K 13
9.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 4.5
41
Embodied Energy, MJ/kg 61
670
Embodied Water, L/kg 200
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
1380 to 3110
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32
43 to 61
Strength to Weight: Bending, points 26
39 to 49
Thermal Diffusivity, mm2/s 4.3
3.4
Thermal Shock Resistance, points 24
47 to 67

Alloy Composition


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Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 50.9 to 63.7
0 to 0.25
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 5.5 to 9.5
0
Nitrogen (N), % 0.3 to 0.5
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
92.5 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4