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SAE-AISI 9255 Steel vs. S32654 Stainless Steel

Both SAE-AISI 9255 steel and S32654 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 43% 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 9255 steel and the bottom bar is S32654 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
220
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 21
45
Fatigue Strength, MPa 270
450
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
82
Shear Strength, MPa 430
590
Tensile Strength: Ultimate (UTS), MPa 680
850
Tensile Strength: Yield (Proof), MPa 390
490

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 46
11
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
34
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 1.5
6.4
Embodied Energy, MJ/kg 20
87
Embodied Water, L/kg 46
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
330
Resilience: Unit (Modulus of Resilience), kJ/m3 400
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 13
2.9
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0.51 to 0.59
0 to 0.020
Chromium (Cr), % 0
24 to 25
Copper (Cu), % 0
0.3 to 0.6
Iron (Fe), % 96.2 to 97
38.3 to 45.3
Manganese (Mn), % 0.7 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 0
7.0 to 8.0
Nickel (Ni), % 0
21 to 23
Nitrogen (N), % 0
0.45 to 0.55
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 1.8 to 2.2
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.0050