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Grade 38 Titanium vs. EN 1.4658 Stainless Steel

Grade 38 titanium belongs to the titanium alloys classification, while EN 1.4658 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is EN 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 11
28
Fatigue Strength, MPa 530
530
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 40
81
Shear Strength, MPa 600
580
Tensile Strength: Ultimate (UTS), MPa 1000
900
Tensile Strength: Yield (Proof), MPa 910
730

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 330
1100
Melting Completion (Liquidus), °C 1620
1450
Melting Onset (Solidus), °C 1570
1400
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.0
16
Thermal Expansion, µm/m-K 9.3
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
25
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 35
4.5
Embodied Energy, MJ/kg 560
61
Embodied Water, L/kg 160
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
240
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
1280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 62
32
Strength to Weight: Bending, points 49
26
Thermal Diffusivity, mm2/s 3.2
4.3
Thermal Shock Resistance, points 72
24

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 0
0 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
50.9 to 63.7
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
5.5 to 9.5
Nitrogen (N), % 0 to 0.030
0.3 to 0.5
Oxygen (O), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 89.9 to 93.1
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0