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S44800 Stainless Steel vs. SAE-AISI 1055 Steel

Both S44800 stainless steel and SAE-AISI 1055 steel are iron alloys. They have 65% of their average alloy composition in common. There are 32 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 S44800 stainless steel and the bottom bar is SAE-AISI 1055 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
220
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
11 to 14
Fatigue Strength, MPa 300
260 to 390
Poisson's Ratio 0.27
0.29
Reduction in Area, % 45
34 to 45
Shear Modulus, GPa 82
72
Shear Strength, MPa 370
440 to 450
Tensile Strength: Ultimate (UTS), MPa 590
730 to 750
Tensile Strength: Yield (Proof), MPa 450
400 to 630

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
11
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
12

Otherwise Unclassified Properties

Base Metal Price, % relative 19
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.4
Embodied Energy, MJ/kg 52
18
Embodied Water, L/kg 190
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
80 to 85
Resilience: Unit (Modulus of Resilience), kJ/m3 480
440 to 1070
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 4.6
14
Thermal Shock Resistance, points 19
23 to 24

Alloy Composition

Carbon (C), % 0 to 0.010
0.5 to 0.6
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 62.6 to 66.5
98.4 to 98.9
Manganese (Mn), % 0 to 0.3
0.6 to 0.9
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 2.0 to 2.5
0
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0 to 0.020
0 to 0.050