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SAE-AISI P20 Steel vs. EN 1.4874 Stainless Steel

Both SAE-AISI P20 steel and EN 1.4874 stainless steel are iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 P20 steel and the bottom bar is EN 1.4874 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 540 to 1050
480

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 45
13
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 1.6
7.6
Embodied Energy, MJ/kg 21
110
Embodied Water, L/kg 52
290

Common Calculations

PREN (Pitting Resistance) 2.6
34
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 37
16
Strength to Weight: Bending, points 19 to 29
16
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 18 to 35
11

Alloy Composition

Carbon (C), % 0.28 to 0.4
0.35 to 0.65
Chromium (Cr), % 0.4 to 2.0
19 to 22
Cobalt (Co), % 0
18.5 to 22
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 95.2 to 98.5
23 to 38.9
Manganese (Mn), % 0.35 to 0.71
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.55
2.5 to 3.0
Nickel (Ni), % 0
18 to 22
Niobium (Nb), % 0
0.75 to 1.3
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
2.0 to 3.0