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S31266 Stainless Steel vs. SAE-AISI 8625 Steel

Both S31266 stainless steel and SAE-AISI 8625 steel are iron alloys. Both are furnished in the annealed condition. They have 42% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S31266 stainless steel and the bottom bar is SAE-AISI 8625 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 40
25
Fatigue Strength, MPa 400
240
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 590
330
Tensile Strength: Ultimate (UTS), MPa 860
510
Tensile Strength: Yield (Proof), MPa 470
330

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
39
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.6
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 6.5
1.5
Embodied Energy, MJ/kg 89
20
Embodied Water, L/kg 220
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
110
Resilience: Unit (Modulus of Resilience), kJ/m3 540
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 3.1
10
Thermal Shock Resistance, points 18
17

Alloy Composition

Carbon (C), % 0 to 0.030
0.23 to 0.28
Chromium (Cr), % 23 to 25
0.4 to 0.6
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 34.1 to 46
96.8 to 98
Manganese (Mn), % 2.0 to 4.0
0.7 to 0.9
Molybdenum (Mo), % 5.2 to 6.2
0.15 to 0.25
Nickel (Ni), % 21 to 24
0.4 to 0.7
Nitrogen (N), % 0.35 to 0.6
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040
Tungsten (W), % 1.5 to 2.5
0