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SAE-AISI P21 Steel vs. EN 1.4662 Stainless Steel

Both SAE-AISI P21 steel and EN 1.4662 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 23 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 SAE-AISI P21 steel and the bottom bar is EN 1.4662 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 1130
810 to 830

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
16
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.3
3.2
Embodied Energy, MJ/kg 32
45
Embodied Water, L/kg 62
170

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
29 to 30
Strength to Weight: Bending, points 31
25
Thermal Diffusivity, mm2/s 11
3.9
Thermal Shock Resistance, points 37
22

Alloy Composition

Carbon (C), % 0.18 to 0.22
0 to 0.030
Chromium (Cr), % 0 to 0.5
23 to 25
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
0.1 to 0.8
Iron (Fe), % 92.1 to 94.2
62.6 to 70.2
Manganese (Mn), % 0.35 to 0.72
2.5 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 3.9 to 4.3
3.0 to 4.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.2 to 0.4
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.0050
Vanadium (V), % 0.15 to 0.25
0