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AISI 440B Stainless Steel vs. SAE-AISI S6 Steel

Both AISI 440B stainless steel and SAE-AISI S6 steel are iron alloys. They have 84% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 440B stainless steel and the bottom bar is SAE-AISI S6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
670 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
41
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
3.2
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
2.3
Embodied Energy, MJ/kg 31
33
Embodied Water, L/kg 120
56

Common Calculations

PREN (Pitting Resistance) 18
2.7
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 70
24 to 70
Strength to Weight: Bending, points 24 to 45
22 to 45
Thermal Diffusivity, mm2/s 6.1
11
Thermal Shock Resistance, points 27 to 70
22 to 64

Alloy Composition

Carbon (C), % 0.75 to 1.0
0.4 to 0.5
Chromium (Cr), % 16 to 18
1.2 to 1.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 78.2 to 83.3
92.8 to 94.7
Manganese (Mn), % 0 to 1.0
1.2 to 1.5
Molybdenum (Mo), % 0 to 0.75
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
2.0 to 2.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0.2 to 0.4

Comparable Variants