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EN 1.4658 Stainless Steel vs. Grade 31 Titanium

EN 1.4658 stainless steel belongs to the iron alloys classification, while grade 31 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 31 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 28
20
Fatigue Strength, MPa 530
300
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 81
41
Shear Strength, MPa 580
320
Tensile Strength: Ultimate (UTS), MPa 900
510
Tensile Strength: Yield (Proof), MPa 730
450

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 1100
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 13
8.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 4.5
36
Embodied Energy, MJ/kg 61
600
Embodied Water, L/kg 200
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
99
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
940
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32
32
Strength to Weight: Bending, points 26
32
Thermal Diffusivity, mm2/s 4.3
8.5
Thermal Shock Resistance, points 24
39

Alloy Composition


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Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 0.5 to 2.0
0.2 to 0.8
Copper (Cu), % 0 to 1.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 50.9 to 63.7
0 to 0.3
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 0.050
Oxygen (O), % 0
0 to 0.35
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
97.9 to 99.76
Residuals, % 0
0 to 0.4