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AISI 302B Stainless Steel vs. SAE-AISI 5120 Steel

Both AISI 302B stainless steel and SAE-AISI 5120 steel are iron alloys. Both are furnished in the annealed condition. They have 71% of their average alloy composition in common. There are 31 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 AISI 302B stainless steel and the bottom bar is SAE-AISI 5120 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
16
Fatigue Strength, MPa 210
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 410
310
Tensile Strength: Ultimate (UTS), MPa 580
500
Tensile Strength: Yield (Proof), MPa 230
320

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 930
420
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 17
47
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
19
Embodied Water, L/kg 140
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
71
Resilience: Unit (Modulus of Resilience), kJ/m3 140
280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 4.4
13
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.15
0.17 to 0.22
Chromium (Cr), % 17 to 19
0.7 to 0.9
Iron (Fe), % 65.7 to 73
97.6 to 98.3
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Nickel (Ni), % 8.0 to 10
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 2.0 to 3.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040