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S35315 Stainless Steel vs. Grade 21 Titanium

S35315 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S35315 stainless steel and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Elongation at Break, % 46
9.0 to 17
Fatigue Strength, MPa 280
550 to 660
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
51
Shear Strength, MPa 520
550 to 790
Tensile Strength: Ultimate (UTS), MPa 740
890 to 1340
Tensile Strength: Yield (Proof), MPa 300
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 330
410
Maximum Temperature: Mechanical, °C 1100
310
Melting Completion (Liquidus), °C 1370
1740
Melting Onset (Solidus), °C 1330
1690
Specific Heat Capacity, J/kg-K 480
500
Thermal Conductivity, W/m-K 12
7.5
Thermal Expansion, µm/m-K 16
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 34
60
Density, g/cm3 7.9
5.4
Embodied Carbon, kg CO2/kg material 5.7
32
Embodied Energy, MJ/kg 81
490
Embodied Water, L/kg 220
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
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 26
46 to 69
Strength to Weight: Bending, points 23
38 to 50
Thermal Diffusivity, mm2/s 3.1
2.8
Thermal Shock Resistance, points 17
66 to 100

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0.040 to 0.080
0 to 0.050
Cerium (Ce), % 0.030 to 0.1
0
Chromium (Cr), % 24 to 26
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 33.6 to 40.6
0 to 0.4
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 34 to 36
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0.12 to 0.18
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 1.2 to 2.0
0.15 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
76 to 81.2
Residuals, % 0
0 to 0.4