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SAE-AISI 8620 Steel vs. EN 1.7218 Steel

Both SAE-AISI 8620 steel and EN 1.7218 steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8620 steel and the bottom bar is EN 1.7218 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 210
150 to 230
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 520 to 690
500 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 50
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 24
18 to 55
Strength to Weight: Bending, points 18 to 22
18 to 38
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 15 to 20
15 to 46

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.18 to 0.23
0.22 to 0.29
Chromium (Cr), % 0.4 to 0.6
0.9 to 1.2
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.9 to 98
96.2 to 98.1
Manganese (Mn), % 0.7 to 0.9
0.6 to 0.9
Molybdenum (Mo), % 0.15 to 0.25
0.15 to 0.3
Nickel (Ni), % 0.4 to 0.7
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035

Comparable Variants