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S30601 Stainless Steel vs. Grade 21 Titanium

S30601 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 27 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 S30601 stainless steel and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 37
9.0 to 17
Fatigue Strength, MPa 250
550 to 660
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
22
Shear Modulus, GPa 75
51
Shear Strength, MPa 450
550 to 790
Tensile Strength: Ultimate (UTS), MPa 660
890 to 1340
Tensile Strength: Yield (Proof), MPa 300
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 370
410
Maximum Temperature: Mechanical, °C 950
310
Melting Completion (Liquidus), °C 1360
1740
Melting Onset (Solidus), °C 1310
1690
Specific Heat Capacity, J/kg-K 500
500
Thermal Expansion, µm/m-K 15
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 20
60
Density, g/cm3 7.6
5.4
Embodied Carbon, kg CO2/kg material 3.9
32
Embodied Energy, MJ/kg 55
490
Embodied Water, L/kg 150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 230
2760 to 5010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
32
Strength to Weight: Axial, points 24
46 to 69
Strength to Weight: Bending, points 22
38 to 50
Thermal Shock Resistance, points 16
66 to 100

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.015
0 to 0.050
Chromium (Cr), % 17 to 18
0
Copper (Cu), % 0 to 0.35
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 56.9 to 60.5
0 to 0.4
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0 to 0.2
14 to 16
Nickel (Ni), % 17 to 18
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0 to 0.050
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 5.0 to 5.6
0.15 to 0.25
Sulfur (S), % 0 to 0.013
0
Titanium (Ti), % 0
76 to 81.2
Residuals, % 0
0 to 0.4