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AISI 420 Stainless Steel vs. Grade 37 Titanium

AISI 420 stainless steel belongs to the iron alloys classification, while grade 37 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 420 stainless steel and the bottom bar is grade 37 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 8.0 to 15
22
Fatigue Strength, MPa 220 to 670
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
40
Shear Strength, MPa 420 to 1010
240
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
390
Tensile Strength: Yield (Proof), MPa 380 to 1310
250

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 620
310
Melting Completion (Liquidus), °C 1510
1650
Melting Onset (Solidus), °C 1450
1600
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 27
21
Thermal Expansion, µm/m-K 10
8.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
6.8

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
36
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.0
31
Embodied Energy, MJ/kg 28
500
Embodied Water, L/kg 100
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
76
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 25 to 62
24
Strength to Weight: Bending, points 22 to 41
26
Thermal Diffusivity, mm2/s 7.3
8.4
Thermal Shock Resistance, points 25 to 62
29

Alloy Composition

Aluminum (Al), % 0
1.0 to 2.0
Carbon (C), % 0.15 to 0.4
0 to 0.080
Chromium (Cr), % 12 to 14
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 82.3 to 87.9
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
96.9 to 99
Residuals, % 0
0 to 0.4