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SAE-AISI P21 Steel vs. EN 1.8838 Steel

Both SAE-AISI P21 steel and EN 1.8838 steel are iron alloys. They have a moderately high 95% 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 1.8838 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 1130
610

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.6
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.7
Embodied Energy, MJ/kg 32
23
Embodied Water, L/kg 62
50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 40
21
Strength to Weight: Bending, points 31
20
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 37
18

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.054
Carbon (C), % 0.18 to 0.22
0 to 0.18
Chromium (Cr), % 0 to 0.5
0 to 0.35
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
0 to 0.6
Iron (Fe), % 92.1 to 94.2
95 to 99.985
Manganese (Mn), % 0.35 to 0.72
0 to 1.8
Molybdenum (Mo), % 0
0 to 0.23
Nickel (Ni), % 3.9 to 4.3
0 to 0.85
Niobium (Nb), % 0
0 to 0.060
Nitrogen (N), % 0
0 to 0.027
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.4
0 to 0.65
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0.15 to 0.25
0 to 0.14