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SAE-AISI S4 Steel vs. S21603 Stainless Steel

Both SAE-AISI S4 steel and S21603 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S4 steel and the bottom bar is S21603 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
79
Tensile Strength: Ultimate (UTS), MPa 670 to 2140
690

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
3.6
Embodied Energy, MJ/kg 29
50
Embodied Water, L/kg 48
160

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 77
25
Strength to Weight: Bending, points 22 to 48
22
Thermal Shock Resistance, points 20 to 65
15

Alloy Composition

Carbon (C), % 0.5 to 0.65
0 to 0.030
Chromium (Cr), % 0.1 to 0.5
17.5 to 22
Iron (Fe), % 95.2 to 96.9
57.6 to 67.8
Manganese (Mn), % 0.6 to 1.0
7.5 to 9.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 1.8 to 2.3
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.15 to 0.35
0