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S40930 Stainless Steel vs. SAE-AISI 50B46 Steel

Both S40930 stainless steel and SAE-AISI 50B46 steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 31 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 S40930 stainless steel and the bottom bar is SAE-AISI 50B46 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
21
Fatigue Strength, MPa 130
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 270
340
Tensile Strength: Ultimate (UTS), MPa 430
540
Tensile Strength: Yield (Proof), MPa 190
310

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 710
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
47
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 32
19
Embodied Water, L/kg 94
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
99
Resilience: Unit (Modulus of Resilience), kJ/m3 94
260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 16
19
Strength to Weight: Bending, points 16
19
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 16
16

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0 to 0.030
0.44 to 0.49
Chromium (Cr), % 10.5 to 11.7
0.2 to 0.35
Iron (Fe), % 84.7 to 89.4
97.7 to 98.5
Manganese (Mn), % 0 to 1.0
0.75 to 1.0
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.080 to 0.75
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
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
Titanium (Ti), % 0.050 to 0.2
0