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S44725 Stainless Steel vs. SAE-AISI S1 Steel

Both S44725 stainless steel and SAE-AISI S1 steel are iron alloys. They have 73% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S44725 stainless steel and the bottom bar is SAE-AISI S1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 500
690 to 1840

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1450
1500
Melting Onset (Solidus), °C 1410
1450
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
41
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
8.0
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.1
2.6
Embodied Energy, MJ/kg 44
37
Embodied Water, L/kg 170
56

Common Calculations

PREN (Pitting Resistance) 33
5.9
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
24 to 64
Strength to Weight: Bending, points 18
22 to 42
Thermal Diffusivity, mm2/s 4.6
11
Thermal Shock Resistance, points 16
21 to 56

Alloy Composition

Carbon (C), % 0 to 0.015
0.4 to 0.55
Chromium (Cr), % 25 to 28.5
1.0 to 1.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 67.6 to 73.5
91.6 to 96.7
Manganese (Mn), % 0 to 0.4
0.1 to 0.4
Molybdenum (Mo), % 1.5 to 2.5
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.040
0.15 to 1.2
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.26
0
Tungsten (W), % 0
1.5 to 3.0
Vanadium (V), % 0
0.15 to 0.3