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AISI 384 Stainless Steel vs. S31266 Stainless Steel

Both AISI 384 stainless steel and S31266 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 76% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI 384 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 480
860

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 910
1100
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 20
37
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 3.7
6.5
Embodied Energy, MJ/kg 52
89
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 16
54
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
29
Strength to Weight: Bending, points 17
24
Thermal Diffusivity, mm2/s 4.3
3.1
Thermal Shock Resistance, points 11
18

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.030
Chromium (Cr), % 15 to 17
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 60.9 to 68
34.1 to 46
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 17 to 19
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.045
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