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S40977 Stainless Steel vs. SAE-AISI 9254 Steel

Both S40977 stainless steel and SAE-AISI 9254 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 S40977 stainless steel and the bottom bar is SAE-AISI 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
20
Fatigue Strength, MPa 200
280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 320
410
Tensile Strength: Ultimate (UTS), MPa 510
660
Tensile Strength: Yield (Proof), MPa 310
410

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 720
410
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
46
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.2
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
1.5
Embodied Energy, MJ/kg 27
20
Embodied Water, L/kg 97
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
110
Resilience: Unit (Modulus of Resilience), kJ/m3 250
450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 18
20

Alloy Composition

Carbon (C), % 0 to 0.030
0.51 to 0.59
Chromium (Cr), % 10.5 to 12.5
0.6 to 0.8
Iron (Fe), % 83.9 to 89.2
96.1 to 97.1
Manganese (Mn), % 0 to 1.5
0.6 to 0.8
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
1.2 to 1.6
Sulfur (S), % 0 to 0.015
0 to 0.040