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AISI 303 Stainless Steel vs. Grade 33 Titanium

AISI 303 stainless steel belongs to the iron alloys classification, while grade 33 titanium belongs to the titanium alloys. There are 30 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 AISI 303 stainless steel and the bottom bar is grade 33 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40 to 51
23
Fatigue Strength, MPa 230 to 360
250
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
41
Shear Strength, MPa 430 to 470
240
Tensile Strength: Ultimate (UTS), MPa 600 to 690
390
Tensile Strength: Yield (Proof), MPa 230 to 420
350

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 930
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 17
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
6.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
55
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.0
33
Embodied Energy, MJ/kg 42
530
Embodied Water, L/kg 140
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
86
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 21 to 25
24
Strength to Weight: Bending, points 20 to 22
26
Thermal Diffusivity, mm2/s 4.4
8.7
Thermal Shock Resistance, points 13 to 15
30

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 17 to 19
0.1 to 0.2
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 67.3 to 74.9
0 to 0.3
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 8.0 to 10
0.35 to 0.55
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.010 to 0.020
Phosphorus (P), % 0 to 0.2
0
Ruthenium (Ru), % 0
0.020 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0.15 to 0.35
0
Titanium (Ti), % 0
98.1 to 99.52
Residuals, % 0
0 to 0.4