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Grade 4 Titanium vs. EN 1.4658 Stainless Steel

Grade 4 titanium belongs to the titanium alloys classification, while EN 1.4658 stainless steel belongs to the iron 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 grade 4 titanium and the bottom bar is EN 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
260
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 17
28
Fatigue Strength, MPa 340
530
Impact Strength: V-Notched Charpy, J 23
110
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 41
81
Shear Strength, MPa 390
580
Tensile Strength: Ultimate (UTS), MPa 640
900
Tensile Strength: Yield (Proof), MPa 530
730

Thermal Properties

Latent Heat of Fusion, J/g 420
300
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1610
1400
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 19
16
Thermal Expansion, µm/m-K 9.4
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
25
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
4.5
Embodied Energy, MJ/kg 500
61
Embodied Water, L/kg 110
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
240
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
1280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 40
32
Strength to Weight: Bending, points 37
26
Thermal Diffusivity, mm2/s 7.6
4.3
Thermal Shock Resistance, points 46
24

Alloy Composition

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), % 0 to 0.5
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 0.050
0.3 to 0.5
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 98.6 to 100
0
Residuals, % 0 to 0.4
0