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SAE-AISI 1144 Steel vs. S32950 Stainless Steel

Both SAE-AISI 1144 steel and S32950 stainless steel are iron alloys. They have 66% 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 SAE-AISI 1144 steel and the bottom bar is S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
17
Fatigue Strength, MPa 280 to 430
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
80
Shear Strength, MPa 460 to 510
480
Tensile Strength: Ultimate (UTS), MPa 750 to 840
780
Tensile Strength: Yield (Proof), MPa 420 to 690
550

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
3.4
Embodied Energy, MJ/kg 19
47
Embodied Water, L/kg 47
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 1290
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 30
28
Strength to Weight: Bending, points 23 to 25
24
Thermal Diffusivity, mm2/s 14
4.3
Thermal Shock Resistance, points 22 to 24
21

Alloy Composition

Carbon (C), % 0.4 to 0.48
0 to 0.030
Chromium (Cr), % 0
26 to 29
Iron (Fe), % 97.5 to 98
60.3 to 69.4
Manganese (Mn), % 1.4 to 1.7
0 to 2.0
Molybdenum (Mo), % 0
1.0 to 2.5
Nickel (Ni), % 0
3.5 to 5.2
Nitrogen (N), % 0
0.15 to 0.35
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0.24 to 0.33
0 to 0.010