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AISI 420 Stainless Steel vs. S31266 Stainless Steel

Both AISI 420 stainless steel and S31266 stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 8.0 to 15
40
Fatigue Strength, MPa 220 to 670
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
81
Shear Strength, MPa 420 to 1010
590
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
860
Tensile Strength: Yield (Proof), MPa 380 to 1310
470

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
440
Maximum Temperature: Mechanical, °C 620
1100
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 27
12
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
37
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.0
6.5
Embodied Energy, MJ/kg 28
89
Embodied Water, L/kg 100
220

Common Calculations

PREN (Pitting Resistance) 14
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
290
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
29
Strength to Weight: Bending, points 22 to 41
24
Thermal Diffusivity, mm2/s 7.3
3.1
Thermal Shock Resistance, points 25 to 62
18

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.030
Chromium (Cr), % 12 to 14
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 82.3 to 87.9
34.1 to 46
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 0 to 0.5
5.2 to 6.2
Nickel (Ni), % 0 to 0.75
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5