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S21640 Stainless Steel vs. Grade 20 Titanium

S21640 stainless steel belongs to the iron alloys classification, while grade 20 titanium belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is grade 20 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 46
5.7 to 17
Fatigue Strength, MPa 320
550 to 630
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
47
Shear Strength, MPa 520
560 to 740
Tensile Strength: Ultimate (UTS), MPa 740
900 to 1270
Tensile Strength: Yield (Proof), MPa 350
850 to 1190

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 940
370
Melting Completion (Liquidus), °C 1430
1660
Melting Onset (Solidus), °C 1380
1600
Specific Heat Capacity, J/kg-K 480
520
Thermal Expansion, µm/m-K 17
9.6

Otherwise Unclassified Properties

Density, g/cm3 7.7
5.0
Embodied Carbon, kg CO2/kg material 3.6
52
Embodied Energy, MJ/kg 51
860
Embodied Water, L/kg 150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 300
2940 to 5760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
33
Strength to Weight: Axial, points 27
50 to 70
Strength to Weight: Bending, points 23
41 to 52
Thermal Shock Resistance, points 16
55 to 77

Alloy Composition

Aluminum (Al), % 0
3.0 to 4.0
Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 17.5 to 19.5
5.5 to 6.5
Hydrogen (H), % 0
0 to 0.020
Iron (Fe), % 63 to 74.3
0 to 0.3
Manganese (Mn), % 3.5 to 6.5
0
Molybdenum (Mo), % 0.5 to 2.0
3.5 to 4.5
Nickel (Ni), % 4.0 to 6.5
0
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0 to 0.030
Oxygen (O), % 0
0 to 0.12
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
71 to 77
Vanadium (V), % 0
7.5 to 8.5
Zirconium (Zr), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4