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Grade 3 Titanium vs. S21800 Stainless Steel

Grade 3 titanium belongs to the titanium alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 28 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 grade 3 titanium and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
210
Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 21
40
Fatigue Strength, MPa 300
330
Poisson's Ratio 0.32
0.28
Reduction in Area, % 34
62
Shear Modulus, GPa 39
75
Shear Strength, MPa 320
510
Tensile Strength: Ultimate (UTS), MPa 510
740
Tensile Strength: Yield (Proof), MPa 440
390

Thermal Properties

Latent Heat of Fusion, J/g 420
340
Maximum Temperature: Mechanical, °C 320
900
Melting Completion (Liquidus), °C 1660
1360
Melting Onset (Solidus), °C 1610
1310
Specific Heat Capacity, J/kg-K 540
500
Thermal Expansion, µm/m-K 9.2
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
15
Density, g/cm3 4.5
7.5
Embodied Carbon, kg CO2/kg material 31
3.1
Embodied Energy, MJ/kg 510
45
Embodied Water, L/kg 110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
250
Resilience: Unit (Modulus of Resilience), kJ/m3 910
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
26
Strength to Weight: Axial, points 32
27
Strength to Weight: Bending, points 32
24
Thermal Shock Resistance, points 37
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 0
16 to 18
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
59.1 to 65.4
Manganese (Mn), % 0
7.0 to 9.0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0 to 0.050
0.080 to 0.18
Oxygen (O), % 0 to 0.35
0
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0
3.5 to 4.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.8 to 100
0
Residuals, % 0 to 0.4
0