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Grade 4 Titanium vs. S82122 Stainless Steel

Grade 4 titanium belongs to the titanium alloys classification, while S82122 stainless steel belongs to the iron alloys. There are 31 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 S82122 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
260
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 17
34
Fatigue Strength, MPa 340
360
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Shear Strength, MPa 390
460
Tensile Strength: Ultimate (UTS), MPa 640
680
Tensile Strength: Yield (Proof), MPa 530
450

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
990
Melting Completion (Liquidus), °C 1660
1420
Melting Onset (Solidus), °C 1610
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 9.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
12
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 31
2.6
Embodied Energy, MJ/kg 500
37
Embodied Water, L/kg 110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
210
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
510
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 40
25
Strength to Weight: Bending, points 37
22
Thermal Diffusivity, mm2/s 7.6
4.0
Thermal Shock Resistance, points 46
19

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
20.5 to 21.5
Copper (Cu), % 0
0.5 to 1.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
68.9 to 75.4
Manganese (Mn), % 0
2.0 to 4.0
Molybdenum (Mo), % 0
0 to 0.6
Nickel (Ni), % 0
1.5 to 2.5
Nitrogen (N), % 0 to 0.050
0.15 to 0.2
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98.6 to 100
0
Residuals, % 0 to 0.4
0