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AISI 309S Stainless Steel vs. SAE-AISI 5155 Steel

Both AISI 309S stainless steel and SAE-AISI 5155 steel are iron alloys. Both are furnished in the annealed condition. They have 64% 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 309S stainless steel and the bottom bar is SAE-AISI 5155 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
21
Fatigue Strength, MPa 210
260
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 400
390
Tensile Strength: Ultimate (UTS), MPa 580
620
Tensile Strength: Yield (Proof), MPa 230
380

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1080
420
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
49
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
19
Embodied Water, L/kg 170
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0 to 0.080
0.51 to 0.59
Chromium (Cr), % 22 to 24
0.7 to 0.9
Iron (Fe), % 58.1 to 66
97.2 to 97.9
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040