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SAE-AISI 50B44 Steel vs. AISI 430F Stainless Steel

Both SAE-AISI 50B44 steel and AISI 430F stainless steel are iron alloys. Both are furnished in the annealed condition. They have 83% 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 SAE-AISI 50B44 steel and the bottom bar is AISI 430F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
23
Fatigue Strength, MPa 250
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 360
340
Tensile Strength: Ultimate (UTS), MPa 570
540
Tensile Strength: Yield (Proof), MPa 360
310

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 410
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
8.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.1
Embodied Energy, MJ/kg 19
29
Embodied Water, L/kg 48
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 350
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20
20
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 17
19

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0 to 0.12
Chromium (Cr), % 0.2 to 0.6
16 to 18
Iron (Fe), % 97.5 to 98.5
79.2 to 83.9
Manganese (Mn), % 0.75 to 1.0
0 to 1.3
Phosphorus (P), % 0 to 0.035
0 to 0.060
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0.15 to 0.35