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S40977 Stainless Steel vs. SAE-AISI 1144 Steel

Both S40977 stainless steel and SAE-AISI 1144 steel are iron alloys. They have 87% 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 S40977 stainless steel and the bottom bar is SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
11 to 17
Fatigue Strength, MPa 200
280 to 430
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 320
460 to 510
Tensile Strength: Ultimate (UTS), MPa 510
750 to 840
Tensile Strength: Yield (Proof), MPa 310
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 720
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
51
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.4
Embodied Energy, MJ/kg 27
19
Embodied Water, L/kg 97
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 250
480 to 1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
27 to 30
Strength to Weight: Bending, points 18
23 to 25
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 18
22 to 24

Alloy Composition

Carbon (C), % 0 to 0.030
0.4 to 0.48
Chromium (Cr), % 10.5 to 12.5
0
Iron (Fe), % 83.9 to 89.2
97.5 to 98
Manganese (Mn), % 0 to 1.5
1.4 to 1.7
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0.24 to 0.33