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EN 1.4020 Stainless Steel vs. SAE-AISI P20 Steel

Both EN 1.4020 stainless steel and SAE-AISI P20 steel are iron alloys. They have 70% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.4020 stainless steel and the bottom bar is SAE-AISI P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 770 to 1130
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.8
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.6
Embodied Energy, MJ/kg 37
21
Embodied Water, L/kg 150
52

Common Calculations

PREN (Pitting Resistance) 23
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
19 to 37
Strength to Weight: Bending, points 25 to 32
19 to 29
Thermal Shock Resistance, points 16 to 23
18 to 35

Alloy Composition

Carbon (C), % 0 to 0.15
0.28 to 0.4
Chromium (Cr), % 16.5 to 19
0.4 to 2.0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 62.8 to 71.8
95.2 to 98.5
Manganese (Mn), % 11 to 14
0.35 to 0.71
Molybdenum (Mo), % 0
0.3 to 0.55
Nickel (Ni), % 0.5 to 2.5
0
Nitrogen (N), % 0.2 to 0.45
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.030